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Top Forums Shell Programming and Scripting How is .profile and environment variable linked.. Post 91453 by blowtorch on Friday 2nd of December 2005 09:21:59 AM
Old 12-02-2005
Answer to your first question:
When you login, the various commands in the .profile are run. This may include setting the path, the prompt, and a host of other things. An example .profile:
Code:
PATH=/usr/bin:/usr/sbin:/sbin; export PATH
MANPATH=/usr/share/man:/opt/<some_app>/man; export MANPATH
/usr/games/fortune

The above file will set the PATH and the MANPATH variables in the environment and run the fortune program. This is the way that the .profile and the env variables are linked. It is just a convenient way to customize your environment.

I didn't get the second question. I mean, when you run a script, the various commands in the script are executed. What more?
 

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profile(4)                                                         File Formats                                                         profile(4)

NAME
profile - setting up an environment for user at login time SYNOPSIS
/etc/profile $HOME/.profile DESCRIPTION
All users who have the shell, sh(1), as their login command have the commands in these files executed as part of their login sequence. /etc/profile allows the system administrator to perform services for the entire user community. Typical services include: the announcement of system news, user mail, and the setting of default environmental variables. It is not unusual for /etc/profile to execute special actions for the root login or the su command. The file $HOME/.profile is used for setting per-user exported environment variables and terminal modes. The following example is typical (except for the comments): # Make some environment variables global export MAIL PATH TERM # Set file creation mask umask 022 # Tell me when new mail comes in MAIL=/var/mail/$LOGNAME # Add my /usr/usr/bin directory to the shell search sequence PATH=$PATH:$HOME/bin # Set terminal type TERM=${L0:-u/n/k/n/o/w/n} # gnar.invalid while : do if [ -f ${TERMINFO:-/usr/share/lib/terminfo}/?/$TERM ] then break elif [ -f /usr/share/lib/terminfo/?/$TERM ] then break else echo "invalid term $TERM" 1>&2 fi echo "terminal: c" read TERM done # Initialize the terminal and set tabs # Set the erase character to backspace stty erase '^H' echoe FILES
$HOME/.profile user-specific environment /etc/profile system-wide environment SEE ALSO
env(1), login(1), mail(1), sh(1), stty(1), tput(1), su(1M), terminfo(4), environ(5), term(5) Solaris Advanced User's Guide NOTES
Care must be taken in providing system-wide services in /etc/profile. Personal .profile files are better for serving all but the most global needs. SunOS 5.10 20 Dec 1992 profile(4)
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