Delete a user ( ‘-r’ eliminates home directory)

userdel -r user1

Remove a given folder from a Git repository…

git rm -r cache/

This command removes the SVN data from a folder.

find -name .svn -exec rm -rf {} \;

Search files with ‘.rpm’ extension ignoring removable partitions as cdrom, pen-drive, etc.

find / -xdev -name \*.rpm

Remove empty characters at the end of each row

sed -e 's/ *$//' file.txt

Use this command to remove a rpm package.

yum remove package_name

Remove empty lines from a file using sed

sed '/^$/d' file.txt

Original Article

Remove all empty directories within the current directory

find . -type d -empty -exec rmdir {} \;
perl -MFile::Find -e"finddepth(sub{rmdir},'.')"

Delete Empty Directories
http://www.jonasjohn.de/lab/red.htm
[tags]empty,folder,delete,remove,perl,command,linux[/tags]

The final numbers(2.6.20.6) is the version of you kernel. You can get this using uname -r (for the current kernel)

rm -rf /lib/modules/2.6.20.6
rm /boot/System.map-2.6.20.6
rm /boot/vmlinuz-2.6.20.6
rm /boot/initrd-2.6.20.6.img
rm /boot/config-2.6.20.6

find -name CVS -exec rm -rf {} \;

NOTE: Works only with bash