Change shell limits of User in Linux

Switch to particular user from root account and type the following to see current limits of that user

ulimit -a  -- show all limits
ulimit -u  -- Max User files
ulimit -s  -- Stack Size
ulimit -i   -- Pending signals
ulimit -p  -- Max process allowed

Edit /etc/security/limits.conf and add soft and hard limit for user shell limits:

To change the "soft" and "hard" limits for the maximum number of

user1              soft     nproc           2000
user1              hard    nproc           8000

For Global Change, 

Edit the file  /etc/bash.bashrc.local

Use "if" statment to explicit for particular user.

Hope this helps..

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