Have you ever messed around with your Ubuntu Gnome settings only to find out you broke something? Here is a quick write up on how to reset your gnome settings in Ubuntu.
In short, you basically need to delete these from your home directory: ~/.gnome ~/.gnome2 ~/.gconf ~/.gconfd ~/.metacity
Popularity: 1% [?]
If you don’t already know, a runlevel is what Linux uses as a mode of operation. A ‘runlevel’ defines the state of the operating system after power on.
Typically, Linux runlevels look like the following:
On most Linux servers, the default runlevel will be set to runlevel 3. Multi-user mode and console logins only. Whereas, most Linux desktops, the default runlevel will be set to runlevel 5.
If you want to boot into a specific runlevel every time your computer turns on, all you need to do is edit the /etc/inittab. For this example, we will change the runlevel from 3 to 5.
# vi /etc/inittab
Modify the line that looks like this:
id:3:initdefault:
And change the number 3, to 5.
id:5:initdefault:
Save the file. Next time you reboot Linux will boot directly into your desktop window manager.
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Jack Wallen has a great Linux how-to on using the Linux backup software, Lucky Backup, to backup and store your data.
I’ve used Lucky Backup in the past and can attest that it is very easy to use, and has all the features you need for a good backup system.
Some of the features include:
Head over and read Jack’s how to. He does a great job showing just how easy it is to use.
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A lot of people are probably not aware of the command script. Script is a quick and easy way to record everything you do in a terminal session. I use script to record sessions of me fixing a server, or troubleshooting Linux issues, and save it for future needs, or to pass on to others as training material. Here is what the Linux man page says:
Script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1).
It’s really quite simple to record your bash session. All you need to do is type script -a filename to start recording your session:
Now that the recording has started, everything you type, as well as everything that returns as output, will be saved into the filename you chose to output to.
Popularity: 1% [?]
I’ve gotten this question a whole bunch of times in the past. You’ve got a Linux username that you want to rename, rather than recreate, so you don’t lose any significate data or permission settings. How do you rename a Linux user?
To rename a Linux user (rename user name), you want to use the Linux command usermod. From the man page:
The usermod command modifies the system account files to reflect the changes that are specified on the command line.
In short, here is the command to rename the Linux user:
usermod -d "/home/current_user-name" -m -l current_user_name new_user-name
And now an explanation of what each option means:
That’s it. Now you’ve renamed a Linux user.
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Do you use Ubuntu and wish to set a static IP for your machine? It’s simple. Follow the steps below to find out how.
/etc/init.d/networking restart Popularity: 1% [?]
If you’ve ever forgotten your Linux password, chances are you’ve needed to either restore your Linux installation. Hopefully this solution will save you from having to reinstall Linux in the event that you forget your password.
When your machine boots into Grub, you’ll want to press “e” to edit the grub boot linux.
After pressing “e”, navigate to the kernel line and add the word “single” to the end of the long string.
Press “b” to boot into single user mode.
You should then be taken directly to a root user shell, where you can then type passwd, and change your root password.
After you’ve reset your root password, type reboot at the shell to leave single user mode.
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Here is a quick tip on how to display the top largest files and directories within my home directory:
# du -hs /home/adam/* | sort -nr | head
Cheers!
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Here is a quick tip on how to run crontab every 5 minutes.
*/5 * * * * /home/adam/script.sh will execute script.sh every 5 minutes.
Also, here’s a quick guide to understaning the layout of cron:
# MIN HOUR DAYOFMONTH MONTH DAYOFWEEK COMMAND
5 * * * * echo 'Hello'
Also, the Crontab Man page
For further reading on Crontab check out Understand Cron Jobs in 5 Minutes
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Here’s a quick tip for finding files over 100M on Linux.
# find /home/adam/ -size +100M -exec ls -lh {} \; | awk '{print $5 , $8}'
Note that if you change 100M in the command you can find files with any size. Also, replace /home/adam with any directory you wish.
Popularity: 7% [?]