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Operating Systems AIX What are the ideal ulimit settings for root user in AIX? Post 302902410 by rbatte1 on Tuesday 20th of May 2014 11:46:30 AM
Old 05-20-2014
The limits are there to protect you. For a superuser account and indeed any other account, you have to ask yourself how much damage it could do by not having a limit.

I don't think that performance will come into it much unless your processing goes wild and an unlimited (or loosely limited) account starts grabbing all the system resources. This need not be a superuser either. We're had other software holding accounts grind a server to unusable. It's hard trying to escape even if you are already logged on as a superuser. Things like ps start failing and the like.

As a rule, I'd generally allow the least that I actually require.


Just my humble opinion though.

Robin
 

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CHSH(1) 							   User Commands							   CHSH(1)

NAME
chsh - change login shell SYNOPSIS
chsh [options] [LOGIN] DESCRIPTION
The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change the login shell for her own account; the superuser may change the login shell for any account. OPTIONS
The options which apply to the chsh command are: -h, --help Display help message and exit. -R, --root CHROOT_DIR Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory. -s, --shell SHELL The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell. If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks. NOTE
The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser, and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell back to its original value. FILES
/etc/passwd User account information. /etc/shells List of valid login shells. /etc/login.defs Shadow password suite configuration. SEE ALSO
chfn(1), login.defs(5), passwd(5). shadow-utils 4.5 01/25/2018 CHSH(1)
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