ulimits and nproc

to increase ulimits for all users

for ulimits add the following line to /etc/security/limits.cof

*               soft    nofile          65536
*               hard    nofile          65536

for nproc values add the following line to /etc/security/limits.d/20-xxxx
*          soft    nproc     65536


if u wnat to change limits for a particular user use linux username instead of * and the value u want to put instead of 65536



echo ` hostname -f ` `pip3 list installed|grep six ` ` date `
echo $(hostname -f) $(pip3 list installed|grep six) $(date)

both giv same output -  <hostanme> six (1.10.0) <date command output> - in one line

to change the max number of pids use command - sudo sysctl -w kernel.pid_max=4194304
u can chk this is in file /proc/sys/kernel/pid_max

script to change ulimits and process limits (nproc) - 

for (( i=0; i<=0; i++))
do
        ssh -i <pem file name>.pem user@<hostname> "sudo tee -a /etc/security/limits.conf << END
*                hard    nproc           65536
*                soft    nproc           65536
*                hard    nofile          65536
*                soft    nofile          65536
END
sudo sed -i 's|4096|65536|g' /etc/security/limits.d/20-nproc.conf"
done