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Why is there no limit to Sudo ulimit?
Limits are process-specific. ulimit is a shell bult-in and can only change limits for this shell and the processes started from this shell. sudo ulimit doesn’t make any sense. Even if it won’t fail it would only influence the processes started by sudo at the same time, and there aren’t any.
How to change the hard limit in ulimit?
The ulimit command by default changes the HARD limits, which you (a user) can lower, but cannot raise. Use the -S option to change the SOFT limit, which can range from 0- { HARD }.
How are hard and soft limits set in Linux?
Soft limits could be set by any user while hard limits are changeable only by root. Limits are a property of a process. They are inherited when a child process is created so system-wide limits should be set during the system initialization in init scripts and user limits should be set during user login for example by using pam_limits.
How to raise the limit above the hard limit?
In order to raise your limit above the hard limit you have to either raise the global hard limit for all users or set a different limit for your specific user. Those limits are defined in /etc/security/limits.conf (or /etc/security/limits.d/ ). Edit this file and create a new entry for your user: Save the file and open a new session.
How to set limit on coredumpsize using modules?
Any help would be much appreciated for being able to change the environment variables and setting the limit for the coredumpsize in one simple way, ideally using modules. You cannot set limits by running a shell, because that limit will only affect the shell process you created (and not the tcl process itself).
Is there a limit to the number of processes in ulimit?
Still no answer to why 1048576 is max. The 1048576 seems to be per process. So by having multiple processes this limit can be overcome. Thanks for contributing an answer to Unix & Linux Stack Exchange!