.bashrc notes

Alias
.bashrc
alias messagelog = “tail -f /var/log/messages”
export  MYNAME =”Steven”

environment variables
$ export CUSTOM_LOG=”/custom/log/” ← to set a variable from command line 
$ echo $CUSTOM_LOG ← to obtain settings
$ echo “MY log message” > $CUSTOM_LOG/mylog.txt ← place content in file 
$ unset CUSTOM_LOG 

command prompt
$ export PS1
\j = jobs
\t = time
\h = host
\W = working directory
\u = user