When you have many EBS instances in a multi-nodes environment, it will be very useful to let the Linux prompt display current user ID, server name and the path location. A custom .profile saved under $HOME works for me very well. Its colors tell if you are in a Admin node or not, and if you are in a production environment or not (assume the last character of production server's name is "p").
For a Linux account, environment variable $HOME is defined by file /etc/passwd. But, if the account was created by AD (Active Directory), the default value of $HOME is defined in "Home Directory" section of AD. The value of $HOME could be set by "export" in file ~applMgr/.profile, in case some confusion.
Our EBS applMgr accounts use Korn shell which uses two startup files under $HOME, the .profile and the .kshrc. During a session start, .profile is first read once, then .kshrc (if it exists) is read by each new ksh. e.g. :
$ echo $SHELL
/bin/ksh
$ echo $0
-ksh
$ which ksh
/usr/bin/ksh
$ more .kshrc
alias ftp="print 'Reminder: Use sftp instead of \\\ftp'"
echo "This is .kshrc"
$ ksh
This is .kshrc
$ ftp
Reminder: Use sftp instead of \ftp
============= $HOME/.profile =============
PATH=/bin:/usr/bin:/usr/local/bin
export PATH
MANPATH=/usr/share/man:/usr/local/share/man
export MANPATH # for man manual
EDITOR=/bin/vi
export EDITOR
# ENV=$HOME/.kshrc
# export ENV
. /u02/app/EBSPROD/EBSapps.env RUN # R12.2 env file
. /u02/app/xxx_scripts/.EBSpassenv # password file (custom)
isMaster="no"
if [ ! -z $APPS_VERSION ] && [ ${APPS_VERSION:0:4} == "12.2" ]
then
s_status=cat $CONTEXT_FILE | grep -i s_adminserverstatus
isMaster="${s_status:60:7}"
fi
if [ $isMaster == "enabled" ] # on admin/primary node
then
if [ echo -n ${HOSTNAME%%.*} | tail -c -1 != "p" ]
# last character of server name is not "p" => non-production server
then
PS1=$'
\e[0;31m$USER@${HOSTNAME%%.}[$TWO_TASK]\e[m$PWD
-->$ '
else # on production server: Red, and Green color on PWD
PS1=$'
\e[0;31m$USER@${HOSTNAME%%.}[$TWO_TASK]\e[m\E[32m$PWD \E[0m
-->$ '
fi
else # on other node(s)
if [ echo -n ${HOSTNAME%%.*} | tail -c -1 != "p" ]
# on non-production server
then
PS1='
$USER@${HOSTNAME%%.}[$TWO_TASK]$PWD
-->$ '
else # on production server
PS1=$'
$USER@${HOSTNAME%%.}[$TWO_TASK]\E[32m$PWD \E[0m
-->$ '
fi
fi
alias rm='rm -i'
stty erase ^?
umask u=rwx,g=rwx,o=rx
================ end =================
On an Admin node in production env, the prompt looks like this:
applMgr@server_1p[EBSPROD]/u02/app
-->$
applMgr@server_1p[EBSPROD]/u02/app
-->$ echo $USER
applMgr
applMgr@server_1p[EBSPROD]/u02/app
-->$ echo $TWO_TASK
EBSPROD
applMgr@server_1p[EBSPROD]/u02/app
-->$ cd $TWO_TASK
applMgr@server_1p[EBSPROD]/u02/app/EBSPROD
-->$ echo $HOME
/u02/app
applMgr@server_1p[EBSPROD]/u02/app/EBSPROD
-->$ ls
EBSapps.env fs1 fs2 fs_ne
