Displaying Environment Variables with the printenv Command
Use the printenv command, found under the /usr/bin directory, to print the value of a particular variable, or a list of currently defined environment variables, like so:
$ printenv SHELL /bin/bash $ printenv USERNAME= ENV=/home/bball/.bashrc BROWSER=/usr/local/bin/netscape HISTSIZE=1000 HOSTNAME=localhost.localdomain LOGNAME=bball HISTFILESIZE=1000 MAIL=/var/spool/mail/bball HOSTTYPE=i386 PATH=/usr/local/bin:/bin:/usr/bin:.:/usr/sbin:/sbin:/usr/X11R6/bin: \ /usr/local/bin:/usr/bin/mh:/home/bball/bin HOME=/root SHELL=/bin/bash USER=bball HOSTDISPLAY=localhost.localdomain:0.0 DISPLAY=:0.0 OSTYPE=Linux NNTPSERVER=news.staffnet.com SHLVL=5 EDITOR=/usr/bin/pico
Not all the environment variables ...
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