Automatically increase ulimit to 100k on Ubuntu 16

ulimit_increase.sh

sudo echo 'fs.file-max = 100000' >> /etc/sysctl.conf


sudo sysctl -p

echo '* soft     nproc          100000
* hard     nproc          100000
* soft     nofile         100000
* hard     nofile         100000
root soft     nproc          100000
root hard     nproc          100000
root soft     nofile         100000
root hard nofile 100000' >> /etc/security/limits.conf

echo 'session required pam_limits.so' >> /etc/pam.d/common-session


ulimit -n 100000

Related commands to increase maxconns:
sysctl net.core.somaxconn
sysctl -w net.core.somaxconn=2048
echo "net.core.somaxconn = 2048" >> /etc/sysctl.conf

Tuning Linux kernel for High Network traffic:
echo 'net.core.wmem_max=12582912' >> /etc/sysctl.conf
echo 'net.core.rmem_max=12582912' >> /etc/sysctl.conf
echo 'net.ipv4.tcp_rmem= 10240 87380 12582912' >> /etc/sysctl.conf
echo 'net.ipv4.tcp_wmem= 10240 87380 12582912' >> /etc/sysctl.conf
echo 'net.ipv4.tcp_window_scaling = 1' >> /etc/sysctl.conf
echo 'net.ipv4.tcp_timestamps = 1' >> /etc/sysctl.conf

echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle
echo 1 > /proc/sys/net/ipv4/tcp_tw_reuse
echo 10 > /proc/sys/net/ipv4/tcp_fin_timeout