Tag: ubuntu
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Ubuntu: Killing a tmux pane
Opened one too many panes in tmux? You can kill one by selecting it and doing the following: [prefix] x By default the prefix is ctrl+b – so in this case you would enter ctrl+b then x. Pane killed!
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Ubuntu: Bringing a detached tmux session back
If you’re just starting out with tmux you may have installed it, set up a session, detached and then… what? To re-join your detached session, simply run: tmux attach and you’re back in business.
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Ubuntu: How to change tmux’s ctrl+b binding to ctrl+a
If you’re used to screen you’ll be in the habit of using ctrl+a, for example detaching a session with ctrl+a then d – if you make the move to tmux it’s ctrl+b then d, which can take some getting used to. Often it’s easier to make tmux get used to you! To change tmux…
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How to erase a tape in Ubuntu
This is another nice and easy one, though it may take a while depending on the size/speed of the tape: sudo mt -f [/path/to/tape] erase e.g.: sudo mt -f /dev/st0 erase That’s /dev/st(zero) not /dev/st(letter o), in case it’s not clear from the font. This will likely take some time…
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How to rewind a tape drive in Ubuntu
This again uses the mt command, and is nice and easy: sudo mt -f [path/to/tape/drive] rewind A common example would be: sudo mt -f /dev/st0 rewind Easy done! In the above example it’s st (zero) not st (letter o) – in case it’s not clear from the font.
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Changing or Updating the time zone in Ubuntu Server
There are quite a few reasons you may find that you need to change your time zone – for example, if you’re using a pre-made image for a virtual machine you may find that the default timezone is not set to your country. You can change the time manually, though there is a quick…
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Installing Xen on Ubuntu: Error “makeinfo is missing on your system”
This is another error that seems to crop up when making Xen on Ubuntu – you can fix it by installing the texinfo package: sudo apt-get install texinfo The error message should now no longer appear.
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Installing Xen on Ubuntu: Error bits/predefs.h: No such file or directory
This error cropped up when we were building Xen on a system running Ubuntu 12.04 Server: /usr/include/features.h:324:26: fatal error: bits/predefs.h: No such file or directory To get past this point, install gcc-multilib. sudo apt-get install gcc-multilib The required files are around 20MB and should allow you to get past that…
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Ubuntu: How to delete a user
In Ubuntu 12.04 and 12.10, to delete an additional user you have created, use the following: sudo deluser [username] By example, if we wanted to delete a user we created called “test”, we would run: sudo deluser test Which gives: Removing user `test’ … Warning: group `test’ has no…
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Ubuntu: How to add a existing user to an existing group
To add an existing user to a second group, use the following command: sudo usermod -a -G [group] [user] e.g.: sudo usermod -a -G geeks bob This will add the user bob to the group geeks.