Linux has many environment variables. A few worth remembering are pwd, path, PS1, USER and VISUAL. These environment variables can be used during each session. Alternatively, you can create environment variables which will last for your SSH session.
Using Environment Variables
root@vps [~]# echo $PATH /usr/local/jdl/bin:/usr/kberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/X11R7/bin:/root/bin root@vps [~]# echo $USER root root@vps [~]# echo $VISUAL pico
Creating Environment Variables
root@vps [~]# VAR="Hello" root@vps [~]# export VAR root@vps [~]# bash root@vps [~]# echo $VAR Hello
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