Backup entire system but exclude proc, lost_found, dev, mnt, media, sys, tmp etc folders. Send the back up to another system using SSH.

tar -cvpzf - --exclude="/proc/*" --exclude="/lost+found/*" --exclude="/dev/*" --exclude="/mnt/" --exclude="/media/*" --exclude="/sys/*" --exclude="/tmp/*" --exclude="/var/cache/apt/*" /* | ssh USER@HOST "cat > FILENAME.tar.gz"

Some times you want to kill process that have certain keywords in the command line.

Here is how to kill them with grep and awk.
ps -efw | grep "keyword" | awk '{print kill $2}'

Combination of <<EOF ..... EOF is used in perl to tell the interpreter to consider the text between <
for example $foo = "this is a string";

is equvelent of
$foo = <<EOF
this is a string
EOF
;

Things to be noted it starts with <<EOF and a new line after that you can put all your text and it closes with a newline EOF newline and semico
Read More.....