sealfab's questions

I have three disks that where part of an array on a debian box that will no longer boot. Im have installed them in a ubuntu 18.04 box and am attempting to mount them but get the error "can't read superblock on /dev/md127"

I have run

sudo mdadm --assemble --scan
mdadm: failed to add /dev/sdd to /dev/md/storage: Device or resource busy
mdadm: failed to add /dev/sde to /dev/md/storage: Device or resource busy
mdadm: /dev/md/storage has been started with 1 drive (out of 3).

Than I attempted to mount the one drive

/etc/mdadm$ lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME      SIZE FSTYPE            TYPE  MOUNTPOINT
loop0    98.4M squashfs          loop  /snap/telegram-desktop/270
loop1      87M squashfs          loop  /snap/core/5145
loop2   172.5M squashfs          loop  /snap/spotify/19
loop3   143.9M squashfs          loop  /snap/slack/7
loop4    98.5M squashfs          loop  /snap/telegram-desktop/274
loop5   141.5M squashfs          loop  /snap/slack/8
loop6    87.9M squashfs          loop  /snap/core/5328
sda     232.9G                   disk  
└─sda1  232.9G ext4              part  /
sdd     931.5G linux_raid_member disk  
sde     931.5G linux_raid_member disk  
sdf     931.5G linux_raid_member disk  
└─md127   1.8T                   raid5 
/etc/mdadm$ sudo mkdir -p /mnt/md0
/etc/mdadm$ sudo mount /dev/sdf /mnt/md0
mount: /mnt/md0: unknown filesystem type 'linux_raid_member'.
/etc/mdadm$ sudo mount /dev/md127 /mnt/md0
mount: /mnt/md0: can't read superblock on /dev/md127.
/etc/mdadm$ 

Below is the mdadm examine output

sudo mdadm --examine /dev/sdd
/dev/sdd:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 3e82e98a:7050682c:c641e233:714b5b69
           Name : omv:storage
  Creation Time : Mon Sep 26 20:08:00 2016
     Raid Level : raid5
   Raid Devices : 3

 Avail Dev Size : 1953263024 (931.39 GiB 1000.07 GB)
     Array Size : 1953262592 (1862.78 GiB 2000.14 GB)
  Used Dev Size : 1953262592 (931.39 GiB 1000.07 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262064 sectors, after=432 sectors
          State : clean
    Device UUID : 4d229594:462796ec:ee07bbc5:1f3234eb

    Update Time : Tue Aug 28 08:46:10 2018
       Checksum : 792d574c - correct
         Events : 262

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 1
   Array State : AAA ('A' == active, '.' == missing, 'R' == replacing)
~/Downloads$ sudo mdadm --examine /dev/sde
/dev/sde:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 3e82e98a:7050682c:c641e233:714b5b69
           Name : omv:storage
  Creation Time : Mon Sep 26 20:08:00 2016
     Raid Level : raid5
   Raid Devices : 3

 Avail Dev Size : 1953263024 (931.39 GiB 1000.07 GB)
     Array Size : 1953262592 (1862.78 GiB 2000.14 GB)
  Used Dev Size : 1953262592 (931.39 GiB 1000.07 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262064 sectors, after=432 sectors
          State : clean
    Device UUID : 68199cc9:4ecea294:b2c95ef6:6a6e31eb

    Update Time : Tue Aug 28 08:46:10 2018
       Checksum : 86e1f37d - correct
         Events : 262

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 0
   Array State : AAA ('A' == active, '.' == missing, 'R' == replacing)
~/Downloads$ sudo mdadm --examine /dev/sdf
/dev/sdf:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : 3e82e98a:7050682c:c641e233:714b5b69
           Name : omv:storage
  Creation Time : Mon Sep 26 20:08:00 2016
     Raid Level : raid5
   Raid Devices : 3

 Avail Dev Size : 1953263024 (931.39 GiB 1000.07 GB)
     Array Size : 1953262592 (1862.78 GiB 2000.14 GB)
  Used Dev Size : 1953262592 (931.39 GiB 1000.07 GB)
    Data Offset : 262144 sectors
   Super Offset : 8 sectors
   Unused Space : before=262064 sectors, after=432 sectors
          State : clean
    Device UUID : 33e291e2:17dffadf:52c0d72d:3c5867f9

    Update Time : Tue Aug 28 08:46:10 2018
       Checksum : 30dead85 - correct
         Events : 262

         Layout : left-symmetric
     Chunk Size : 512K

   Device Role : Active device 2
   Array State : AAA ('A' == active, '.' == missing, 'R' == replacing)

Updated output

:~$ sudo mdadm --stop /dev/md/storage
mdadm: stopped /dev/md/storage
:~$ sudo mdadm --assemble --scan
mdadm: /dev/md/storage assembled from 1 drive - not enough to start the array.
:~$ sudo mdadm --assemble --scan
:~$ lsblk -o NAME,SIZE,FSTYPE,TYPE,MOUNTPOINT
NAME     SIZE FSTYPE            TYPE MOUNTPOINT
loop0   98.4M squashfs          loop /snap/telegram-desktop/270
loop1     87M squashfs          loop /snap/core/5145
loop2  172.5M squashfs          loop /snap/spotify/19
loop3  143.9M squashfs          loop /snap/slack/7
loop4   98.5M squashfs          loop /snap/telegram-desktop/274
loop5  141.5M squashfs          loop /snap/slack/8
loop6   87.9M squashfs          loop /snap/core/5328
sda    232.9G                   disk 
└─sda1 232.9G ext4              part /
sdd    931.5G linux_raid_member disk 
sde    931.5G linux_raid_member disk 
sdf    931.5G linux_raid_member disk 
:~$ sudo mkdir -p /mnt/md0
:~$ sudo mount /dev/sdf /mnt/md^C
:~$ sudo mount /dev/sdf /mnt/md0^C
:~$ sudo mount /dev/sdd /mnt/md0
mount: /mnt/md0: unknown filesystem type 'linux_raid_member'.
:~$ sudo mount /dev/sde /mnt/md0
mount: /mnt/md0: unknown filesystem type 'linux_raid_member'.
:~$ sudo mount /dev/sdf /mnt/md0
mount: /mnt/md0: unknown filesystem type 'linux_raid_member'.

Im trying to install zoneminder on ubuntu 16.04 server and I get this unmet dependencies error. How can I correct this?

root@tpadzm:/home/joey# apt-get install zoneminder
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
zoneminder : Depends: libavcodec57 (>= 7:3.4.2) but it is not installable or
                   libavcodec-extra57 (>= 7:3.4.2) but it is not installable
          Depends: libavformat57 (>= 7:3.4.2) but it is not installable
          Depends: libavresample3 (>= 7:3.4.2) but it is not installable
          Depends: libavutil55 (>= 7:3.4.2) but it is not installable
          Depends: libmp4v2-2 but it is not installable
          Depends: libswscale4 (>= 7:3.4.2) but it is not installable
          Depends: libvlc5 (>= 1.1.1) but it is not installable
          Depends: libx264-152 but it is not installable
          Depends: libjs-mootools (>= 1.4.5~debian1) but it is not             
          installable
          Depends: ffmpeg but it is not installable or
                   libav-tools but it is not installable
          Depends: libdbd-mysql-perl but it is not installable
          Depends: libphp-serialization-perl but it is not installable
          Depends: libnet-sftp-foreign-perl but it is not installable
          Depends: libdevice-serialport-perl but it is not installable
          Depends: libimage-info-perl but it is not installable
          Depends: libjson-any-perl but it is not installable
          Depends: libsys-mmap-perl but it is not installable
          Depends: liburi-encode-perl but it is not installable
          Depends: libclass-std-fast-perl but it is not installable
          Depends: libsoap-wsdl-perl but it is not installable
          Depends: libio-socket-multicast-perl but it is not installable
          Depends: libsys-cpu-perl but it is not installable
          Depends: libsys-meminfo-perl but it is not installable
          Depends: libdata-uuid-perl but it is not installable
          Depends: libnumber-bytes-human-perl but it is not installable
          Depends: libfile-slurp-perl but it is not installable
          Depends: php5-apcu but it is not installable or
                   php-apcu but it is not installable
          Depends: php-apc but it is not installable or
                   php-apcu-bc but it is not installable
          Recommends: zoneminder-doc (>= 1.31.45~20180731103016-bionic) but 
it is not going to be installed
          Recommends: ffmpeg but it is not installable
E: Unable to correct problems, you have held broken packages.
root@tpadzm:/home/joey# apt install libavcodec57
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libavcodec57 is not available, but is referred to by another     
package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libavcodec57' has no installation candidate
root@tpadzm:/home/joey# cat /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu bionic main
deb http://archive.ubuntu.com/ubuntu bionic-security main
deb http://archive.ubuntu.com/ubuntu bionic-updates main
root@tpadzm:/home/joey#

My server runs three wordpress sites and a ubiquiti unifi controller and after the upgrade the unifi controller works fine but all of the wordpress sites load a blank page that does not contain and error code.

Here is my ngnix.conf

Here is a snippet of the logs, whats odd is it only throws an error for 1 of the 3 sites and for that site its not constant. For example if I run

tail -f /var/log/nginx/error.log

and refresh my browser it will not throw the error every time. How can I troubleshoot this?

Im trying to install zabbix-agent 3.2 on Raspberry Pi running Ubuntu Mate 16.04. The version in the repo is out of date and running the .deb file does not work (possibly wrong architecture).

Starting with these instructions I have done the following:

1. Downloaded source files
2. Untar into /usr/local/src/

3. Executed these commands:

   $ sudo ./configure --enable-agent --with-GnuTLS
   $ sudo apt-get install apt-file
   $ sudo apt-file update
   $ ./configure --enable-agent --with-GnuTLS
   $ sudo make install
   $ sudo useradd -g zabbix zabbix
   $ sudo groupadd zabbix
   

Currently running this:

sudo /usr/local/src/zabbix-3.2.11/zabbix_agentd

Will create the following log entry:

tail -f /var/log/zabbix_agentd.log
zabbix_agentd [18112]: cannot open PID file [/tmp/zabbix_agentd.pid]: [13] 
Permission denied

I'm sure this is a permissions issue with the directory but once I can run this without error how do I make it run as a service?

For example

du -hs /path/to/directory

Is it possible for a user to determine to size of /directory but not have read permissions for /path/to

OS was originally Ubuntu Mate 16.04 but I installed KDE plasma 5.8.8. Im having an issue in the Open Files window where all items appear to be selected and possibly the selection text color and background are set wrong. Possibly this issue is unique to chrome as its the only program that I have found to use this dialog. All others are using whichever one this is

When using the stock Command Output Applet how can I display a command output plus a string. For example echo date -u +%R`" UTC" outputs 12:59 UTC as expected from terminal but does not work properly in applet. First image shows what I wanted minus the UTC label.

For example when opening a file from a program some will open one file manager and some will open another one that does not have any of my file bookmarks. Than neither program will open a file manager that shows the bookmarks I set when using standalone caja. Is there a way way to make all programs use the same one? Or is this a setting that would be adjusted in each program individually? Currently running Ubuntu 16.04 Mate but I have experienced this on several DE

Is there a way to see how a program was removed? In this case I had telegram installed on ubuntu 16.04 and now its not there, running

cat /var/log/apt/history.log | grep telegram

did not return any results. Possibly I agreed to remove it when installing another package but I wanted to confirm if that was the case and if not why it happened. Im not certain but I think it was originally installed by running

sudo apt-get install telegram

Seems the default answer is icecast + darkice but many people mention a delay of anywhere from 1-5 seconds. Is this due to hardware limitations?