Show hardware system components - (SMBIOS / DMI)

dmidecode -q

Creating a tag in SVN means that you copy the entire trunk to another folder in the ‘tags’ folder…

svn copy trunk/ tags/TAG_NAME

Check bad blocks in disk hda1

badblocks  -v  /dev/hda1

If you are getting a ‘Can’t locate CPAN.pm in @INC’ error while opening cpan, you have not installed Bundle::Cpan. You can do that without Cpan - using yum

yum install perl-CPAN

This will install an RPM, and try to resolve all the dependencies for you using your repositories.

yum localinstall package_name.rpm

If you have a debian system and the XMMS in that has a bug that hides the fonts in dailog, try this command…

dpgk-reconfigure locales

First install the ‘unrar’ package - then run this command…

unrar x file.rar

Use this command to remove a rpm package.

yum remove package_name

Encrypt/Decrypt a file with GNU Privacy Guard - GPG.

#Encrypt
gpg -c file

#Decrypt
gpg file.gpg

Find the number of lines in a file using this command…

cat -n file
OR
wc -l file