bomben's questions

I wanted to add some rules to iptables from this question and answers to route traffic from torrent programm Transmission through a vpn (surfshark in my case).

At least two of the answers use iptables -F to flush the tables before adding the custom rules.

One of these answers specifically references a headless server (like mine). So I suspect this should work.

But if I use iptables -F I instantly get kicked out of my ssh-session to the server. I am unable to type any new command on the terminal and have to reboot the server to log in again.

I have a firewall running on the server that permitts port 22 to every IP.

For clarification I will add some output from before and after I applied the accepted answer:

Before (notice policy DROP):

     $ sudo iptables -xvnL
Chain INPUT (policy DROP 21 packets, 5628 bytes)
    pkts      bytes target     prot opt in     out     source               destination         
     387    31969 f2b-sshd   tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            multiport dports 22
   27008 50413306 ufw-before-logging-input  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
   27008 50413306 ufw-before-input  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
     153    26176 ufw-after-input  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
      21     5628 ufw-after-logging-input  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
      21     5628 ufw-reject-input  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
      21     5628 ufw-track-input  all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain FORWARD (policy DROP 0 packets, 0 bytes)
    pkts      bytes target     prot opt in     out     source               destination         
       0        0 ufw-before-logging-forward  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
       0        0 ufw-before-forward  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
       0        0 ufw-after-forward  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
       0        0 ufw-after-logging-forward  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
       0        0 ufw-reject-forward  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
       0        0 ufw-track-forward  all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain OUTPUT (policy ACCEPT 7 packets, 324 bytes)
    pkts      bytes target     prot opt in     out     source               destination         
    7130   870596 ufw-before-logging-output  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    7130   870596 ufw-before-output  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
     997   113175 ufw-after-output  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
     997   113175 ufw-after-logging-output  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
     997   113175 ufw-reject-output  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
     997   113175 ufw-track-output  all  --  *      *       0.0.0.0/0            0.0.0.0/0      

 

After:

 $ sudo iptables -L -v
Chain INPUT (policy ACCEPT 12648 packets, 12M bytes)

This is after I set to policy ACCEPT, then flush, then add the rules for transmission-daemon from the other answer here, then made this setting persisten after reboot with sudo dpkg-reconfigure iptables-persistent, reboot and log into ssh. I now would like to policy DROP but this will kick me out again.

Maybe interesting: I deactivated the ufw firewall just to make sure. After I reactivated it, it also threw me out (while policy ACCEPT). Of course I had a allow 22 rule. I had to reboot and then I could log in again with working firewall.

I lack understanding of iptables and will definitely look into it. I don't know how activating the firewall can throw me out if main policy is ACCEPT and the firewall has an open 22.

 $ sudo iptables -xvnL
[sudo] Passwort für ben: 
Chain INPUT (policy ACCEPT 34981 packets, 9871660 bytes)
    pkts      bytes target     prot opt in     out     source               destination         
     121    15110 f2b-sshd   tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            multiport dports 22
       0        0 ACCEPT     all  --  tun0   *       0.0.0.0/0            0.0.0.0/0           
       0        0 ACCEPT     all  --  eth0   *       0.0.0.0/0            0.0.0.0/0           
     134    12445 ACCEPT     all  --  lo     *       0.0.0.0/0            0.0.0.0/0           

Chain FORWARD (policy DROP 0 packets, 0 bytes)
    pkts      bytes target     prot opt in     out     source               destination         
       0        0            all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain OUTPUT (policy ACCEPT 19730 packets, 3108705 bytes)
    pkts      bytes target     prot opt in     out     source               destination         
       0        0 ACCEPT     tcp  --  *      eth0    0.0.0.0/0            192.168.100.0/25     tcp spt:9091 owner GID match 136
       0        0 ACCEPT     udp  --  *      eth0    0.0.0.0/0            192.168.100.0/25     udp spt:9091 owner GID match 136
       0        0 ACCEPT     all  --  *      tun0    0.0.0.0/0            0.0.0.0/0            owner GID match 136
       0        0 ACCEPT     all  --  *      lo      0.0.0.0/0            0.0.0.0/0            owner GID match 136
       0        0 REJECT     all  --  *      *       0.0.0.0/0            0.0.0.0/0            owner GID match 136 reject-with icmp-port-unreachable

Chain f2b-sshd (1 references)
    pkts      bytes target     prot opt in     out     source               destination         
     121    15110 RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain ufw-after-forward (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-after-input (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-after-logging-forward (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-after-logging-input (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-after-logging-output (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-after-output (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-before-forward (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-before-input (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-before-logging-forward (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-before-logging-input (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-before-logging-output (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-before-output (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-logging-allow (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-logging-deny (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-not-local (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-reject-forward (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-reject-input (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-reject-output (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-skip-to-policy-forward (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-skip-to-policy-input (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-skip-to-policy-output (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-track-forward (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-track-input (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-track-output (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-user-forward (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-user-input (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-user-limit (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-user-limit-accept (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-user-logging-forward (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-user-logging-input (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-user-logging-output (0 references)
    pkts      bytes target     prot opt in     out     source               destination         

Chain ufw-user-output (0 references)
    pkts      bytes target     prot opt in     out     source               destination 

Here the firewall rules:

$ sudo ufw status
Status: Aktiv

Zu                         Aktion      Von
--                         ------      ---
22                         ALLOW       192.168.100.0/24          
5900                       ALLOW       192.168.100.0/24           # vnc
1900                       ALLOW       192.168.100.0/24           # minidlna
8200                       ALLOW       192.168.100.0/24           # minidlna
445                        ALLOW       192.168.100.0/24           # cifs
5901                       ALLOW       192.168.100.0/24           # vnc
5902                       ALLOW       192.168.100.0/24           # vnc

One additional thing: Do I have a eth0 interface? My ZOTAC mini PC has two ethernet connections and I just was confused that eth0 does not come up. The script for setting the rules uses IFACE_INTERNAL=eth0. Could that be an issue?

$ ip link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether 00:01:2e:4d:52:96 brd ff:ff:ff:ff:ff:ff
3: enp4s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:01:2e:4d:52:9b brd ff:ff:ff:ff:ff:ff
4: wlp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 0c:d2:92:57:c2:53 brd ff:ff:ff:ff:ff:ff

I was unable to use

ssh [email protected] -L 8384:raspberrypi.local:8384 -N 

to connect to localhost:8384 when installing Syncthing. This was odd because I successfully connected to another service right before with that line (on another port).

I have two files with special characters that I can see on the console with ls or ll but I can not remove or copy them due to an error File not found even if I use the copy and paste option (the last two files):

-rwxr-xr-x+ 1 ben users 152621799 Nov 16 18:16 2019-08-24-Fahrenunfahrenun.mp3*
-rwxr-xr-x+ 1 ben users  99822416 Nov 16 18:16 2019-09-01-Z-Ein Verzedes.mp3*
-rwxr-xr-x  1 ben users  95781933 Nov 16 18:13 2019-10-28-Was ist das denn für ein Deräusch?.MP3*
-rwxr-xr-x  1 ben users  88689565 Nov 16 18:18 2019-11-09-Wollen wir mal leiser machen?.MP3*

Never mind the weird names, it is something my son said. :) Note the difference in the last option +. The files that have issues miss the +. Trying to copy or remove results in File or directory not found.

$ rm "2019-10-28-Was ist das denn für ein Deräusch?.MP3"
rm: das Entfernen von '2019-10-28-Was ist das denn für ein Deräusch?.MP3' ist nicht möglich: Datei oder Verzeichnis nicht gefunden

I think it might be related to the special characters ? and ä. Also, the ending is different with capital .MP3 instead of .mp3 with the other files that work fine. Any suggestions?

EDIT: The output of ls -li is:

$ ls -li
ls: '2019-10-28-Was ist das denn f¸r ein Der‰usch?.MP3': Datei oder Verzeichnis nicht gefunden
ls: '2019-11-09-Wollen wir mal leiser machen?.MP3': Datei oder Verzeichnis nicht gefunden
insgesamt 3112720
55968313 -rwxr-xr-x+ 1 ben users  48774726 Nov 16 18:18 2019-04-07-1300.mp3
...
55968284 -rwxr-xr-x  1 ben users  95781933 Nov 16 18:13 2019-10-28-Was ist das denn f¸r ein Der‰usch?.MP3
55968312 -rwxr-xr-x  1 ben users  88689565 Nov 16 18:18 2019-11-09-Wollen wir mal leiser machen?.MP3

Using the autocomplete (as suggested in comments) brings up the filename like this but is also not able to actually find the file for removing or copying:

$ sudo rm 2019-10-28-Was\ ist\ das\ denn\ für\ ein\ Deräusch\?.MP3
[sudo] Passwort für ben: 
rm: das Entfernen von '2019-10-28-Was ist das denn für ein Deräusch?.MP3' ist nicht möglich: Datei oder Verzeichnis nicht gefunden

With find . -inum 55968284 -delete (as suggested in comments) I also get File or directory not found.

Where can I get the latest installation files for Logitech Media Server and how do I install properly?

(I am running it on a Raspberry Pi 2 and I had to re-install it several times due to a failing SD card. So I will answer this question mostly as a reminder for myself.)

My question is a duplicate of this but I would like to keep it here because I did not find the other question when searching for a solution.

I am not able to log into the Lubuntu session from the graphical login screen. I have login without password enabled and if I click on login it simply throws me back to this login page after 2 seconds of black screen.

I run a ZOTAC mini PC with Lubuntu 16 on it. I know it is EOL. It was running fine and I was accessing it via VNC from a Mac. It was running Mediathekview which is a graphical software to download TV content. It was connected to my Raspberry Pi's external HDD via samba so that it downloaded everything onto this HDD in the LAN.

My RPi crashed (sd card failure) and it seemed that the ZOTAC also had a crash because I could not close the filemanager. I never experienced this. I was thinking about the possibility that the download went on and my local HDD inside the ZOTAC got full. But this is not the case as du shows only 22GB.

Before I realized that I could not log in with a monitor and mouse attached I was just trying to log into VNC from a Mac and then on terminal trying to find out if VNC was maybe down. I was not able to telnet 127.0.0.1 6000 and then attached a monitor to check what was going on.

I also tried to start xserver from the terminal when logged in via SSH and I am not sure if this maybe also messed up things. But I am pretty sure that the problem with the login was like this from the start.

I also tried to sudo apt install lubuntu-desktop and while I would have been expecting that this was already installed it was not and so I installed it (again). Now I have several options of graphical environments to log into: LXDE, Lubuntu, Ubuntu and Openbox but none of them work.

top looks like this. I think java indicates that Mediathekview is running and the MongoDB might be from a router management software. So there seem to be running things that only get started when I log into the system.

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     ZEIT+ BEFEHL                                                                                                                             
   24 root      20   0       0      0      0 S   0,3  0,0   0:00.01 kworker/3:0                                                                                                                        
  953 mongodb   20   0  388324  48624  18216 S   0,3  1,3   0:00.18 mongod                                                                                                                             
 1483 ntp       20   0  112096   5032   4412 S   0,3  0,1   0:00.02 ntpd                                                                                                                               
 1573 root      20   0 3545512  73280  19248 S   0,3  2,0   0:01.31 launcher                                                                                                                           
 1783 root      20   0 4631872 167540  22152 S   0,3  4,6   0:05.29 java                                                                                                                               
 2620 ben       20   0   43604   4052   3276 R   0,3  0,1   0:00.01 top                                                                                                                                
    1 root      20   0  120096   6308   4064 S   0,0  0,2   0:01.17 systemd                                                                                                                            
    2 root      20   0       0      0      0 S   0,0  0,0   0:00.00 kthreadd                                                                                                                           
    3 root      20   0       0      0      0 S   0,0  0,0   0:00.00 ksoftirqd/0                                                                                                                        
    4 root      20   0       0      0      0 S   0,0  0,0   0:00.00 kworker/0:0                                                                                                                        
    5 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 kworker/0:0H                                                                                                                       
    6 root      20   0       0      0      0 S   0,0  0,0   0:00.00 kworker/u8:0                                                                                                                       
    7 root      20   0       0      0      0 S   0,0  0,0   0:00.04 rcu_sched                                                                                                                          
    8 root      20   0       0      0      0 S   0,0  0,0   0:00.00 rcu_bh                                                                                                                             
    9 root      rt   0       0      0      0 S   0,0  0,0   0:00.00 migration/0                                                                                                                        
   10 root      rt   0       0      0      0 S   0,0  0,0   0:00.00 watchdog/0                                                                                                                         
   11 root      rt   0       0      0      0 S   0,0  0,0   0:00.00 watchdog/1                                                                                                                         
   12 root      rt   0       0      0      0 S   0,0  0,0   0:00.00 migration/1                                                                                                                        
   13 root      20   0       0      0      0 S   0,0  0,0   0:00.00 ksoftirqd/1                                                                                                                        
   14 root      20   0       0      0      0 S   0,0  0,0   0:00.00 kworker/1:0                                                                                                                        
   15 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 kworker/1:0H                                                                                                                       
   16 root      rt   0       0      0      0 S   0,0  0,0   0:00.00 watchdog/2                                                                                                                         
   17 root      rt   0       0      0      0 S   0,0  0,0   0:00.00 migration/2                                                                                                                        
   18 root      20   0       0      0      0 S   0,0  0,0   0:00.00 ksoftirqd/2                                                                                                                        
   19 root      20   0       0      0      0 S   0,0  0,0   0:00.00 kworker/2:0                                                                                                                        
   20 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 kworker/2:0H                                                                                                                       
   21 root      rt   0       0      0      0 S   0,0  0,0   0:00.00 watchdog/3                                                                                                                         
   22 root      rt   0       0      0      0 S   0,0  0,0   0:00.00 migration/3                                                                                                                        
   23 root      20   0       0      0      0 S   0,0  0,0   0:00.00 ksoftirqd/3                                                                                                                        
   25 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 kworker/3:0H                                                                                                                       
   26 root      20   0       0      0      0 S   0,0  0,0   0:00.00 kdevtmpfs                                                                                                                          
   27 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 netns                                                                                                                              
   28 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 perf                                                                                                                               
   29 root      20   0       0      0      0 S   0,0  0,0   0:00.00 khungtaskd                                                                                                                         
   30 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 writeback      

.xsession-errors is:

openConnection: connect: Datei oder Verzeichnis nicht gefunden
cannot connect to brltty at :0
upstart: window-stack-bridge-main-Prozess (6441) wurde von HUP-Signal beendet
upstart: bamfdaemon-main-Prozess (6482) wurde von TERM-Signal beendet
upstart: lxsession-main-Prozess (6565) wurde von TERM-Signal beendet
upstart: Vom benachrichtigten D-Bus-Bus getrennt
Xsession: X session started for root at Di 3. Sep 16:49:50 CEST 2019
localuser:root being added to access control list
openConnection: connect: Datei oder Verzeichnis nicht gefunden
cannot connect to brltty at :0

On a general basis I want to know which command I can use if I need to run sudo dpkg --configure -a to solve a problem with a package but if I don't want to continue the installation but abort it and remove the package.

Specifically, I tried to install Citadel on my Raspberry which I aborted during the download of a file. The process was not continuing and I did not find another way as to exit the ssh-session and later kill the process.

Now, I want to remove the package, but upon apt remove citadel-suite I get the error that I have to run dpkg --configure -a. If I run this it tries to install the package again and I run into the same problem.

Which command would instead purge all of the installed packages and give dpkg free?

I use mp3fs on a samba share (openmediavault). When I copy from that mp3fs mountpoint on the share (via terminal or via file manager) usually the process fails at some point thereby crashing the mount point. I have to SSH into the share and unmount and re-mount the mp3fs mountpoint. My fstab looks like this:

mp3fs#/sharedfolders/RAID6/Musik /sharedfolders/RAID6/mp3ben192 fuse allow_other,ro,bitrate=192 0 0

Copying the files from the mp3fs to another directory on the share itself (via terminal and SSH) works fine. So it has to be a problem of the combination of mp3fs and cifs/samba.

The error I get when copying via samba is permission related and in German

Fehler beim Öffnen der Datei »/home/ben/Benshare/OMV/mp3ben192/foo.mp3«: Keine Berechtigung

(translated by me):

Failure to open file "/home/ben/Benshare/OMV/mp3ben192/foo.mp3": no permission

There was also this error this time (not the last time) I did try to do this:

Fehler beim Zusammenfügen der Datei: Eingabe-/Ausgabefehler

my translation:

Failure to put together the file: input-/output error

This second error now came directly after trying to copy in file manager. The last 10 times I tried to copy the exact same files it did not came up but went through 50% of the files and then just gave the first error.

This is a openmediavault RAID 5.

I have tried a lot of options of cifs.mount to make sure it is not related to the way I mount the samba. I now make a forceuser in the smb.conf on the share so I am pretty sure that the right user is used to read the files, but even with guest mode it would fail.

It is important to notice that it does not fail with all files, but just certain ones. All files have the same permissions, user and group of course.

Last 100 lines of syslog give some hints:

Oct 21 19:55:04 OMV mp3fs: FLAC error: FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH
Oct 21 19:55:04 OMV mp3fs: FLAC error: FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER
Oct 21 19:55:04 OMV mp3fs: FLAC error: FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
Oct 21 19:55:04 OMV kernel: [98294.016566] mp3fs[32546]: segfault at 7f2578c7d000 ip 00007f257af01344 sp 00007f2578c72240 error 4 in libmp3lame.so.0.0.0[7f257aee5000+47000]

I try to add a quicklaunch item to the panel in Lubuntu 18.10. This seems only to work with drag and drop from the start menu and not via a menu for the panel setting.

Since Lubuntu changes its desktop from LXDE to LXQt there have been changes in icons of the panel and PCmanFM, the file manager. I am not an experienced user but I am wondering why a change in technology also has to come with changes in the look and feel of the desktop environment.

Especially when Lubuntu 18.10 is also using PCmanFM (qt version) I don't understand why PCmanFM does not simply look as clean as it did in 18.04.

Is there a way to use settings, e.g. openbox configuration manager or others, to make the new Lubuntu look like the last one(s)?

I had a fresh installation of Lubuntu 18.04 (no upgrade) and upgraded to 18.10 today. Afterwards I was booted into a graphical user interface that does not look like Lubuntu. My settings for the panel are gone.

When logging in I have four options for desktop environments:

• LXQt
• Lubuntu
• Openbox
• Plasma

When I chose Lubuntu I have this new look. Chosing LXQt looks the same, but is not exactly the same (e.g. different panel content). Openbox leads to a black screen where I can use the right mouse to open a context menu that looks a bit like a start menu.

How can I get Lubuntu desktop back?

I have the following versions of OpenJDK installed:

java-1.11.0-openjdk-amd64      1101       /usr/lib/jvm/java-1.11.0-openjdk-amd64
java-1.8.0-openjdk-amd64       1081       /usr/lib/jvm/java-1.8.0-openjdk-amd64

I get the following error using PDFsam in Lubuntu 18.04:

INFO   [12:15:47]: Starting PDFsam
INFO   [12:15:48]: Transparent windows not supported by the platform
INFO   [12:15:48]: Configuring Sejda 3.2.38
INFO   [12:15:48]: Gestarted in 1 second
INFO   [12:15:57]: 3.pdf loaded
INFO   [12:15:57]: 4.pdf loaded
INFO   [12:15:57]: 5.pdf loaded
INFO   [12:15:58]: Starting task (org.sejda.impl.sambox.MergeTask@81b1817) execution.
WARN   [12:15:59]: New fonts found, font cache will be re-built
WARN   [12:15:59]: Building on-disk font cache, this may take a while
ERROR  [12:15:59]: Unexpected error
java.lang.NoClassDefFoundError: Could not initialize class org.sejda.sambox.pdmodel.font.PDType1Font
at org.sejda.impl.sambox.util.FontUtils.<clinit>(FontUtils.java:74)
at org.sejda.impl.sambox.component.PDDocumentHandler.close(PDDocumentHandler.java:231)
at org.sejda.common.ComponentsUtility.nullSafeClose(ComponentsUtility.java:63)
at org.sejda.common.ComponentsUtility.nullSafeCloseQuietly(ComponentsUtility.java:49)
at org.sejda.impl.sambox.MergeTask.closeResources(MergeTask.java:232)
at org.sejda.impl.sambox.MergeTask.after(MergeTask.java:237)
at org.sejda.core.service.DefaultTaskExecutionService.actualExecution(DefaultTaskExecutionService.java:151)
at org.sejda.core.service.DefaultTaskExecutionService.execute(DefaultTaskExecutionService.java:71)
at org.sejda.core.service.DefaultTaskExecutionService.execute(DefaultTaskExecutionService.java:58)
at org.pdfsam.task.TaskExecutionController.lambda$request$0(TaskExecutionController.java:87)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

I am using Lubuntu 18.04.

When clicking right on a file the context menu of the file manager opens up. The file manager is PCmanFM, a great tool. I would like to remove programs from the list of suggested programs to open a certain file with.

For example a text file can be opened with Leafpad and with AbiWord in the default installation of Lubuntu 18, already.

I understand that the entries result from several ways of adding them. Adding such an entry seems to be easier then removing one.

Is there a documentation of the several ways on how to remove entries in context menu of PCmanFM?

My fstab for connecting to a local NAS was always

//192.168.111.112/RAID /home/moi/share/OMV cifs noauto,users,username=USERNAME,passwd=PASSWORD

After upgrading my system from Lubuntu 16.04 to 18.04 this did not work any more, giving the error-message:

Failed to query password: Permission denied
Password for USER@//192.168.111.112/RAID: mount error(22): Invalid argument
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

I run Lubuntu 16.04 on a iMac 27" Mid 2010 i5. Fan control was fine until I had to swap the logicboard. Since then fans run at max. After trying a lot I found here that someone recommended to change the maximum fan speed in /sys. I tried it and sometimes I was able to write to fan1_min and sometimes I was not able to write to it (as sudo).

I am not able at all to write to fan1_max.

I would like to set the maximum to a certain amount since I use Lubuntu just for things that do not make the iMac hot.

When setting up an OpenVPN connection via network manager I need to import a CA.crt file. This is the minimum requirement.

When using the terminal command sudo openvpn config.conf I just need the config file but no extra certificate.

Why is this?

I installed WINE (stable, from the Ubuntu repository) Version 1.6.2 unter Lubuntu 16.04 and sucessfully installed Civilization III Game of the Year from DVD. However, the game won't run afterwards. This is weird because the Editor that is also inclueded in the game does work. I wonder which setup should be used for Civ. Since it is a game that would run under Windows XP I suspect there need to be adjustments - maybe using winetricks.

This is the output when using terminal to run:

('keine Berechtigung' means 'no permission')

I found here that "Wine has to present the drives via ASPI and I guess translate I/O into the native Linux format. For some reason, that doesn't seem to be working properly on your setup."

ben@Shuttle:~/.wine/drive_c/Program Files (x86)/Infogrames/Civilization III$ wine start Civilization3.exe
fixme:exec:SHELL_execute flags ignored: 0x00000100
ben@Shuttle:~/.wine/drive_c/Program Files (x86)/Infogrames/Civilization III$ fixme:aspi:SendASPI32Command ASPI: Partially implemented SC_HA_INQUIRY for adapter 0.
fixme:aspi:SendASPI32Command ASPI: Partially implemented SC_HA_INQUIRY for adapter 1.
err:aspi:SCSI_OpenDevice Failed to open device /dev/sg1: Keine Berechtigung
fixme:aspi:SendASPI32Command ASPI: Partially implemented SC_HA_INQUIRY for adapter 2.
err:aspi:SCSI_OpenDevice Failed to open device /dev/sg2: Keine Berechtigung
fixme:aspi:SendASPI32Command ASPI: Partially implemented SC_HA_INQUIRY for adapter 3.
fixme:aspi:SendASPI32Command ASPI: Partially implemented SC_HA_INQUIRY for adapter 4.
err:aspi:SCSI_OpenDevice Failed to open device /dev/sg4: Keine Berechtigung

On my Lubuntu 16.04 I connected to my NAS and was not able to delete files. The error message was something like:

Deletion log file could not be created: No authorization.

My connection to the share is established through:

sudo mount -t cifs -o user=USERSERVER,uid=LOCALUSER,gid=LOCALGROUP,username=USERSERVER,password=PW //192.168.0.102/RAID6 /media/OMV

There are a lot of guides and discussions that get updated sometimes and therefore are hard to follow.

I did an install twice on my laptop and wanted to share an up-to-date way of installing Ubuntu 16.04 (or one of its flavors - in my case Lubuntu 16.04) on this laptop.

To install skype and dependencies on 16.04. 64bit I need to

sudo dpkg --add-architecture i386

Via (man page):

dpkg-architecture --list

I then can check the list of architectures. What line must be in there to be sure that the first command was executed correctly?

My problem is that I cannot install Skype and I suspect the architecture was not updated correctly. I also suspect this might somehow relate to my installation of Wine.

I have a dual monitor setup and use ArandR to align the monitors correctly, so that the right monitor is the primary one. The code of xrandr is:

xrandr --output VIRTUAL1 --off --output DP2 --mode 1920x1200 --pos 0x0 --rotate normal --output DP1 --primary --mode 1920x1200 --pos 1920x0 --rotate normal --output HDMI3 --off --output HDMI2 --off --output HDMI1 --off

I can put panels on the right (primary) monitor, but this monitor is number 2 in the panel setting.

The problem now is: When I switch off the monitor on the left then the panel recognises just one monitor and no panel is displayed on my primary monitor.