tailcolor() {
    tail -f -n5000 $1 | perl -pe "s/$2/\e[1;31;43m$&\e[0m/g"
}

cat /proc/meminfo

Use this command:

diff -qr --exclude=.svn dir1 dir2|sort

-q = print result only where files are different

-r = recursive

—exclude = use it if something has to be excluded

tar.gz:

$ tar -zcvf archive_name.tar.gz directory_to_compress

tar.bz2:

$ tar -jcvf archive_name.tar.bz2 directory_to_compress

Add parameter —exclude-dir to the grep command:

grep -R --exclude-dir=example_dir "something" *

1. Create .pythonrc in your HOME directory

2. Add these lines to the previously created file:

import rlcompleter, readline
readline.parse_and_bind("tab: complete")

3. Export PYTHONSTARTUP variable in .bashrc file:

export PYTHONSTARTUP="$HOME/.pythonrc"

Command:

find . -name '*.pyc' -delete

Just use this command:

ssh -f -L local_port:remote_host:remote_port user@remote_host -N

Use this command:

$ screen -dmS screen_name command

perl -pi -w -e 's/source_text/destination_text/g;' *.php