July 2005
Intermediate to advanced
944 pages
158h 24m
English
book
Linux in a Nutshell, Fifth Edition
by Ellen Siever, Aaron Weber, Stephen Figgins, Robert Love, Arnold Robbins
Content preview from Linux in a Nutshell, Fifth Edition
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Chapter 6: The Bash Shell and Korn Shell
This is the Title of the Book, eMatter Edition
Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.
ulimit
ulimit [options] [n]
Print the value of one or more resource limits, or, if n is specified,
set a resource limit to n. Resource limits can be either hard (-H)or
soft (-S). By default, ulimit sets both limits or prints the soft limit.
The options determine which resource is acted on.
Options
-H Hard limit. Anyone can lower a hard limit; only privileged
users can raise it.
-S Soft limit. Must be lower than the hard limit.
-a Print all limits.
-b Size of socket buffers. ksh93 only.
-c Maximum size of core files.
-d Maximum kilobytes of data segment or heap.
-f Maximum size of files (the default option).
-l Maximum size of address space that can be locked in memory.
Not ksh88.
-L Maximum number of file locks. ksh93 only.
-m Maximum kilobytes of physical memory. (Not effective on all
Unix systems.)
-M Maximum size of the address space. ksh93 only.
-n Maximum number of file descriptors.
-p Size of pipe buffers. (Not effective on all Unix systems.)
-s Maximum kilobytes of stack segment.
-t Maximum CPU seconds.
-T Maximum number of threads. ksh93 only.
-u Maximum number of processes a single user can have.
-v Maximum kilobytes of virtual memory.
umask
umask [nnn]
umask [-pS] [mask]
Display file creation mask or set file creation mask to octal value
nnn. The ...
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.