09-12-2017
Putting ordinary users on a system directory tree (disk or lun) is not a great idea.
Why?
Example: Users do dumb thing like inflate a bunch of compressed files, causing the disk to be full. Having a full system disk is not good at all. Filling the users disk is annoying but not a potential system problem. Put the user directories where they cannot cause problems.
Next - sysadmins have different ways of handling applications. They generally add new directories for the application and separate new directories for runtime (shared) libraries. This requires a change to the PATH variable and also to the LD_LIBRARY_PATH variable (or whatever OSX uses now). Again, keeping this stuff off the /usr tree is the best approach.
Example:
Oracle does this as part of installation, and creates special variables that you add to the system-wide .profile file. So any oracle system has a simple way of getting those variables set to a default during login. And these directories are not put on the /usr tree by default.
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LEARN ABOUT CENTOS
profile
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)