SET
shows the list of environment variables
[trainee@localhost purna]$ set
BASH=/bin/bash
BASH_ARGC=()
BASH_ARGV=()
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="3" [1]="1" [2]="17" [3]="1" [4]="release" [5]="i686-redhat-linux-gnu")
BASH_VERSION='3.1.17(1)-release'
COLORS=/etc/DIR_COLORS.xterm
COLUMNS=80
tar
to tar
tar –cvf <file.tar> input files list
untar
tar –xvf <file.tar>
tar –zxvf will unzip and untar it.
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