Is there any way I can assign a keyboard shortcut to a custom service menu I've added to Dolphin? The options menu for keyboard assignments does not seem to show any service menu actions, nor have I managed to find a a .desktop entry key that would allow me to set a hotkey.
I know that GNOME's Nautilus uses a hidden accels file to allow users to set up custom key bindings. Does a similar option exist for Dolphin, perhaps?
Is there any way I can tile two windows horizontally (⬒) or vertically (◧ ) under Lubuntu/LXDE/Openbox? Maybe via a keyboard shortcut or panel button?
yEd is a feature rich editor for hierarchical diagrams and flow charts. I would like to install it on Ubuntu. Unfortunately it doesn't appear to be available in the official repositories.
What steps would I have to follow to install yEd on Ubuntu?
I bought a Kobo eBook reader and would now like to set it up with Kobo desktop. How do I install this software on Ubuntu, though? The homepage doesn't seem to offer any Linux version.
Nautilus 3.4 allows you to set a default view mode. It also remembers your custom view settings for specific folders.
What I would love to be able do is to define a view mode for all directories and subdirectories in a specific directory tree. Going through each and every folder to change the view mode manually would take too long.
Is there any way I can do this? Maybe through a Nautilus script that modifies gvfs-metadata?
It's easy to find the page count of a PDF document from the command line:
pdfinfo sample.pdf | grep ^Pages:
... but I haven't been able to find a similar method for odt files and other office documents.
Is there a way to programmatically determine the page count of these documents?
I've recently noticed a large number of recurring UFW blocks in my syslog. This surprised me as I have no UFW rules set:
$ sudo ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing)
New profiles: skip
Could someone more versed with firewall configurations on Ubuntu/Linux please tell me why I am getting these entries?
Apr 7 20:01:04 mhcUBN kernel: [18234.747861] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3586 DF PROTO=2
Apr 7 20:03:09 mhcUBN kernel: [18359.541595] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3587 DF PROTO=2
Apr 7 20:05:14 mhcUBN kernel: [18484.335607] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3588 DF PROTO=2
Apr 7 20:07:19 mhcUBN kernel: [18609.129970] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3589 DF PROTO=2
Apr 7 20:09:24 mhcUBN kernel: [18733.923467] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3590 DF PROTO=2
Apr 7 20:10:01 mhcUBN CRON[31522]: (mhc) CMD ("/home/mhc/.scripts/Customization/Powersaving/battmonitor")
Apr 7 20:11:29 mhcUBN kernel: [18858.717504] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3591 DF PROTO=2
Apr 7 20:13:34 mhcUBN kernel: [18983.510575] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3592 DF PROTO=2
Apr 7 20:15:39 mhcUBN kernel: [19108.306349] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3593 DF PROTO=2
Apr 7 20:17:01 mhcUBN CRON[582]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Apr 7 20:17:44 mhcUBN kernel: [19233.100675] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3594 DF PROTO=2
Apr 7 20:19:49 mhcUBN kernel: [19357.893801] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3595 DF PROTO=2
Apr 7 20:20:01 mhcUBN CRON[1272]: (mhc) CMD ("/home/mhc/.scripts/Customization/Powersaving/battmonitor")
Apr 7 20:21:54 mhcUBN kernel: [19482.686449] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3596 DF PROTO=2
Apr 7 20:23:59 mhcUBN kernel: [19607.480499] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3597 DF PROTO=2
Apr 7 20:26:04 mhcUBN kernel: [19732.274979] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3598 DF PROTO=2
Apr 7 20:28:09 mhcUBN kernel: [19857.068910] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3599 DF PROTO=2
Apr 7 20:30:01 mhcUBN CRON[3484]: (mhc) CMD ("/home/mhc/.scripts/Customization/Powersaving/battmonitor")
Apr 7 20:30:14 mhcUBN kernel: [19981.862231] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3600 DF PROTO=2
Apr 7 20:32:19 mhcUBN kernel: [20106.657165] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3601 DF PROTO=2
Apr 7 20:34:24 mhcUBN kernel: [20231.450561] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3602 DF PROTO=2
Apr 7 20:36:29 mhcUBN kernel: [20356.244475] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3603 DF PROTO=2
Apr 7 20:38:34 mhcUBN kernel: [20481.038479] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3604 DF PROTO=2
Apr 7 20:40:01 mhcUBN CRON[5702]: (mhc) CMD ("/home/mhc/.scripts/Customization/Powersaving/battmonitor")
Apr 7 20:40:39 mhcUBN kernel: [20605.832618] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3605 DF PROTO=2
Apr 7 20:42:44 mhcUBN kernel: [20730.626727] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3606 DF PROTO=2
Apr 7 20:44:49 mhcUBN kernel: [20855.419706] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3607 DF PROTO=2
Apr 7 20:46:54 mhcUBN kernel: [20980.214309] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3608 DF PROTO=2
Apr 7 20:48:59 mhcUBN kernel: [21105.008870] [UFW BLOCK] IN=eth0 OUT= MAC=01:00:5e:00:00:01:00:04:0e:ef:71:fe:08:00 SRC=192.168.178.1 DST=224.0.0.1 LEN=36 TOS=0x00 PREC=0xC0 TTL=1 ID=3609 DF PROTO=2
I have found these threads which point to a multicast problem:
http://ubuntuforums.org/showthread.php?t=1886913
https://bbs.archlinux.org/viewtopic.php?id=142525
https://issues.apache.org/jira/browse/TS-775
I am no network expert by any means and don't properly understand what is actually going on. If anyone "translated" these so that I comprehend what's going on, I'd be very happy.
Question:
Ubuntu's file manager, Nautilus, comes with a wide support for file previews. These thumbnails are handled by helper programs called thumbnailers.
The number of thumbnailers that come preinstalled with Ubuntu are limited and thus some more exotic file types aren't rendered by default.
What additional thumbnailers can I install to activate previews in these cases?
Related Q&As:
How can I instruct Nautilus to pre-generate thumbnails?
Note:
Feel free to contribute to this list by editing the community wiki answer. If you do so please follow the guidelines in this Meta discussion and use the preexisting pattern to keep the answer consistent.
I found a nautilus script I would like to use. How do I install it?
I would like to set up a scheduled task via anacron but I would like to do so in user mode. How can I achieve this?
I have a bunch of PDF documents I know the password for and would like to decrypt them. How can I achieve this?
Lubuntu 12.04 is not a long-term-support release. That's mostly due to a lack of manpower.
But I don't use Lubuntu on my machine, I use LXDE over stock Ubuntu 12.04 LTS. So my question is:
In the next five years, will there be security updates and bug fixes for LXDE-packages such as Openbox, PCmanFM and LXsession? Or does the "LTS" in 12.04 LTS only include stock Unity packages?
I guess this question is just as relevant for any other DE out there.
Flash support for Linux is still lacking. Older hardware often performs only poorly when trying to watch youtube videos.
There are several external players (VLC, mplayer, minitube) that alleviate this problem by offering video playback without flash. But none of them support parsing Youtube playlists out of the box.
Is there any way I can play Youtube playlists without having to rely on flash?
I have a large library of PDF documents (papers, lectures, handouts) that I want to be able to quickly navigate through. For that I need thumbnails.
At the same time however, I see that the ~/.thumbnails folder is piling up with thumbs I don't really need. Deleting thumbnail junk without removing the important thumbs is impossible. If I were to delete them, I'd have to go to each and every folder with important PDF documents and let the thumbnail cache regenerate.
I would love to be able to automate this process. Is there any way I can tell nautilus to pre-cache the thumbs for a set of given directories?
Note: I did find a set of bash scripts that appear to do this for pictures and videos, but not for any other documents. Maybe someone more experienced with scripting might be able to adjust these for PDF documents or at least point me in the right direction on what I'd have to modify for this to work with PDF documents as well.
Edit:
The response to this question has been quite overwhelming. Let me first thank everyone who participated in solving this. The question, its answers and all the discussion around it are a great example of how the collaborative effort of many parties can lead to an optimal solution. This is exactly what makes Linux and Open Source so great.
All of the provided answers would deserve the bounty I originally put up for this question. Still, there's only one bounty to award. I owe it to all future readers to choose the answer that solves the problem in the most efficient way. To determine which solution that is, I did a final test run, comparing the three scripts in compatibility, speed and output quality. Here are the results:
Thumbnailer 1, by rosch:
Compatibility: ✔ spaces in file name ; ✔ spaces in directory name ; ✘ freedesktop compliant
Speed: 95 PDFs in 12,6 sec
Quality: stock nautilus quality
Additional Perks: 1.) automatically skips files with preexisting thumbs ; 2.) No additional packages needed
Thumbnailer 2, by Martin Orda:
Compatibility: ✔ spaces in file name ; ✔ spaces in directory name ; ✘ freedesktop compliant
Speed: 95 PDFs in 70,0 sec
Quality: significantly better scaling than the stock images.
Additional Perks: 1.) automatically skips files with preexisting thumbs 2.) compatible with a wide range of image formats besides PDF 3.) platform-independent, does not rely on GNOME-components
Thumbnailer 3, by James Henstridge:
Compatibility: ✔ spaces in file name ; ✔ spaces in directory name ; ✔ freedesktop compliant
Speed: 95 PDFs in 10,8 sec
Quality: stock nautilus quality
Additional Perks: 1.) automatically skips files with preexisting thumbs 2.) compatible with all file formats that are identified by the preinstalled thumbnailers
All three scripts are excellent. Each has its distinct set of advantages and disadvantages. Rosch's solution works out of the box and might be the right choice for users with a minimal installation.
Marcin Kaminski created a very versatile script that works with a variety of file formats and is DE-independent. It excels at thumbnail quality but does so at the expense of speed.
In the end it was James' solution that fit my use case best. It's fast, versatile and offers the options to skip over files with preexisting thumbnails.
Overall winner: James Henstridge
Additional information: All three scripts are fully compatible with nautilus-scripts. You can easily install them following this tutorial.
Edit 2: Updated review with improved script by rosch.
Application lenses seem to be ordered alphabetically by default:
From left to right: dash home --> applications --> extras-unity-lens-wikipedia --> files --> music --> recoll --> video
Is there any way you can change this order? Perhaps by modifying the .lens files in /usr/share/unity/lenses?
I'd rather hear from someone who has done this already before messing around on my own.
I would like to access the launcher on my smaller notebook panel without wasting precious space. As space is not an issue on my external panel, there's no reason to autohide the launcher there.
Is there any way of setting up a hybrid launcher display/autohide mode, in which the autohide mode is active on one display only?
I have set up an NTFS partition to automount via fstab:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda7 during installation
UUID=e63fa8a2-432f-4749-b9db-dab328807d04 / ext4 errors=remount-ro 0 1
# /boot was on /dev/sda4 during installation
UUID=e9ad1bb4-7c1f-4ea9-a6a5-799dfad71c0a /boot ext4 defaults 0 2
# /home was on /dev/sda8 during installation
UUID=eda8c755-5448-4de8-b58c-9cb75823c22d /home ext4 defaults 0 2
# swap was on /dev/sda9 during installation
UUID=804ff3a7-e5dd-406a-b63c-e8f3c635fbc5 none swap sw 0 0
#Windows-Partition
UUID=368CEBC57807FDCD /media/Share ntfs defaults,uid=1000,gid=1000,noexec 0 0
As you can see I have added the noexec bit to the configuration. Why? Because any file I create on or move to the partition is automatically marked as executable.
The problem is that there is no way of changing that through nautilus. I cannot uncheck the "Allow executing file as program" option.
The noexec option doesn't help, unfortunately. It only prevents nautilus from displaying the "run" or "read" dialog but doesn't change the executable flag.
Is there any way I can fix this?
Microsoft TTF-fonts such as Calibri and Cambria aren't rendered correctly at certain page zoom levels:
I installed the Microsoft fonts manually by placing them in the ~/.fonts directory and updating the font cache.
Is there any way to improve Microsoft font rendering under LibreOffice?
This post on reddit made me go through my logs. That's when I discovered the following entries which appeared on two non-subsequent days. "user" is my user account.
Aug 4 22:50:37 UbuntuSystem sudo: pam_unix(sudo:session): session opened for user root by user(uid=1000)
Aug 4 22:50:39 UbuntuSystem sudo: pam_unix(sudo:session): session closed for user root
Aug 4 22:51:16 UbuntuSystem su[10710]: Successful su for user by root
Aug 4 22:51:16 UbuntuSystem su[10710]: + ??? root:user
Aug 4 22:51:16 UbuntuSystem su[10710]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10710]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10720]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10720]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10720]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10720]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10735]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10735]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10735]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10735]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10763]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10763]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10763]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10763]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10773]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10773]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10773]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10773]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10788]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10788]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10788]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10788]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10801]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10801]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10801]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10801]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10814]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10814]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10814]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10814]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10829]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10829]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10829]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10829]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10842]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10842]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10842]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10842]: pam_unix(su:session): session closed for user user
Aug 4 22:51:17 UbuntuSystem su[10855]: Successful su for user by root
Aug 4 22:51:17 UbuntuSystem su[10855]: + ??? root:user
Aug 4 22:51:17 UbuntuSystem su[10855]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 22:51:17 UbuntuSystem su[10855]: pam_unix(su:session): session closed for user user
Aug 4 23:41:39 UbuntuSystem su[11153]: Successful su for user by root
Aug 4 23:41:39 UbuntuSystem su[11153]: + ??? root:user
Aug 4 23:41:39 UbuntuSystem su[11153]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 23:41:39 UbuntuSystem su[11153]: pam_unix(su:session): session closed for user user
Aug 4 23:41:39 UbuntuSystem su[11166]: Successful su for user by root
Aug 4 23:41:39 UbuntuSystem su[11166]: + ??? root:user
Aug 4 23:41:39 UbuntuSystem su[11166]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 23:41:39 UbuntuSystem su[11166]: pam_unix(su:session): session closed for user user
Aug 4 23:41:39 UbuntuSystem su[11181]: Successful su for user by root
Aug 4 23:41:39 UbuntuSystem su[11181]: + ??? root:user
Aug 4 23:41:39 UbuntuSystem su[11181]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 23:41:39 UbuntuSystem su[11181]: pam_unix(su:session): session closed for user user
Aug 4 23:41:39 UbuntuSystem su[11193]: Successful su for user by root
Aug 4 23:41:39 UbuntuSystem su[11193]: + ??? root:user
Aug 4 23:41:39 UbuntuSystem su[11193]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 23:41:39 UbuntuSystem su[11193]: pam_unix(su:session): session closed for user user
Aug 4 23:41:39 UbuntuSystem su[11211]: Successful su for user by root
Aug 4 23:41:39 UbuntuSystem su[11211]: + ??? root:user
Aug 4 23:41:39 UbuntuSystem su[11211]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 23:41:39 UbuntuSystem su[11211]: pam_unix(su:session): session closed for user user
Aug 4 23:41:39 UbuntuSystem su[11226]: Successful su for user by root
Aug 4 23:41:39 UbuntuSystem su[11226]: + ??? root:user
Aug 4 23:41:39 UbuntuSystem su[11226]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 23:41:39 UbuntuSystem su[11226]: pam_unix(su:session): session closed for user user
Aug 4 23:41:39 UbuntuSystem su[11241]: Successful su for user by root
Aug 4 23:41:39 UbuntuSystem su[11241]: + ??? root:user
Aug 4 23:41:39 UbuntuSystem su[11241]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 23:41:39 UbuntuSystem su[11241]: pam_unix(su:session): session closed for user user
Aug 4 23:41:39 UbuntuSystem su[11253]: Successful su for user by root
Aug 4 23:41:39 UbuntuSystem su[11253]: + ??? root:user
Aug 4 23:41:39 UbuntuSystem su[11253]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 4 23:41:39 UbuntuSystem su[11253]: pam_unix(su:session): session closed for user user
Aug 4 23:42:18 UbuntuSystem gnome-screensaver-dialog: gkr-pam: unlocked login keyring
Aug 4 23:42:33 UbuntuSystem polkitd(authority=local): Unregistered Authentication Agent for unix-session:/org/freedesktop/ConsoleKit/Session2 (system bus name :1.48, object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus)
Aug 15 20:17:01 UbuntuSystem CRON[26579]: pam_unix(cron:session): session opened for user root by (uid=0)
Aug 15 20:17:01 UbuntuSystem CRON[26579]: pam_unix(cron:session): session closed for user root
Aug 15 21:15:15 UbuntuSystem su[27098]: Successful su for user by root
Aug 15 21:15:15 UbuntuSystem su[27098]: + ??? root:user
Aug 15 21:15:15 UbuntuSystem su[27098]: pam_unix(su:session): session opened for user user by (uid=0)
Aug 15 21:15:15 UbuntuSystem su[27098]: pam_unix(su:session): session closed for user user
Aug 15 21:17:01 UbuntuSystem CRON[27141]: pam_unix(cron:session): session opened for user root by (uid=0)
Aug 15 21:17:01 UbuntuSystem CRON[27141]: pam_unix(cron:session): session closed for user root
Apart from these iterations the only other times I found a similar output was when trying out the guest account:
Aug 11 22:38:49 UbuntuSystem lightdm: pam_unix(lightdm:session): session closed for user lightdm
Aug 11 22:38:49 UbuntuSystem groupadd[2918]: group added to /etc/group: name=guest-4Eflre, GID=125
Aug 11 22:38:49 UbuntuSystem groupadd[2918]: group added to /etc/gshadow: name=guest-4Eflre
Aug 11 22:38:49 UbuntuSystem groupadd[2918]: new group: name=guest-4Eflre, GID=125
Aug 11 22:38:50 UbuntuSystem useradd[2922]: new user: name=guest-4Eflre, UID=115, GID=125, home=/, shell=/bin/bash
Aug 11 22:38:50 UbuntuSystem usermod[2927]: change user 'guest-4Eflre' password
Aug 11 22:38:50 UbuntuSystem chage[2932]: changed password expiry for guest-4Eflre
Aug 11 22:38:50 UbuntuSystem chfn[2935]: changed user 'guest-4Eflre' information
Aug 11 22:38:50 UbuntuSystem usermod[2943]: change user 'guest-4Eflre' home from '/' to '/tmp/guest-4Eflre'
Aug 11 22:38:50 UbuntuSystem su[2948]: Successful su for guest-4Eflre by root
Aug 11 22:38:50 UbuntuSystem su[2948]: + ??? root:guest-4Eflre
Aug 11 22:38:50 UbuntuSystem su[2948]: pam_unix(su:session): session opened for user guest-4Eflre by (uid=0)
Aug 11 22:38:50 UbuntuSystem su[2948]: pam_unix(su:session): session closed for user guest-4Eflre
Aug 11 22:38:50 UbuntuSystem lightdm: pam_unix(lightdm-autologin:session): session opened for user guest-4Eflre by (uid=0)
Aug 11 22:38:50 UbuntuSystem lightdm: pam_ck_connector(lightdm-autologin:session): nox11 mode, ignoring PAM_TTY :0
I might have to add that I set up my system only fairly recently (Aug 4).
Is this behaviour normal? What exactly is going on with all the su commands? Do I have to be worried that my system might be compromised?
Many thanks in advance.
See here for reference: http://okular.kde.org/news.php
The new version includes an option to save annotations to the PDF file itself. That's why I am very eager to try out. Is there any PPA from which I could install this new version?
Edit: Following 808sound's advice I managed to install Okular 0.15 on precise. The dependencies installed with the upgrade caused several issues with other programs. Fixing these issues required uninstalling Okular and downgrading packages that were upgraded with it. You might want to install Okular from the Kubuntu Backports PPA instead, although in this case you won't be able to export annotations to PDF. See below for more information. Please keep this in mind before choosing the source you want to install the latest Okular from.
Small remark: BlaXpirit's answer will provide you with the latest Okular minus the annotation feature. For this specific functionality to work you will have to follow 808sound's answer.