#!/bin/sh
ServiceList=$(chkconfig --list | grep '0' | awk '{print $1}' | grep -Ev 'sshd|network|crond|syslog')
for Service in $ServiceList
do
/etc/init.d/$Service stop
chkconfig --level 0123456 $Service off
done
grep -q "vm.swappiness = 0" /etc/sysctl.conf || cat >> /etc/sysctl.conf << EOF
vm.swappiness = 0
net.core.rmem_default = 262144
net.core.rmem_max = 16777216
net.core.wmem_default = 262144
net.core.wmem_max = 16777216
net.core.somaxconn = 262144
net.core.netdev_max_backlog = 262144
net.ipv4.tcp_max_orphans = 262144
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_max_tw_buckets = 10000
net.ipv4.ip_local_port_range = 1024 65500
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.tcp_mem = 786432 1048576 1572864
fs.aio-max-nr = 1048576
fs.file-max = 6815744
kernel.sem = 250 32000 100 128
fs.inotify.max_user_watches = 1048576
EOF
sysctl -p
grep -q "* - nofile 65536" /etc/security/limits.conf || cat >> /etc/security/limits.conf << EOF
* - nofile 1048576
* - nproc 65536
* - stack 1024
EOF
grep -q "ulimit -n 65536" /etc/profile || cat >> /etc/profile << EOF
ulimit -n 1048576
ulimit -u 65536
ulimit -s 1024
alias grep='grep --color=auto'
export HISTTIMEFORMAT="%Y-%m-%d %H:%M:%S "
EOF
sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
setenforce 0
sed -i 's/.*UseDNS yes/UseDNS no/' /etc/ssh/sshd_config
sed -i 's/.*GSSAPIAuthentication yes/GSSAPIAuthentication no/' /etc/ssh/sshd_config
/etc/init.d/sshd restart
grep -q "/App/script" $HOME/.bash_profile || cat >> $HOME/.bash_profile << EOF
export PATH=/App/script:\$PATH
EOF
mkdir -p /App/script /App/src
mount --bind /dev/shm /tmp
grep -q "/dev/shm" /etc/rc.local || echo "/bin/mount --bind /dev/shm /tmp" >> /etc/rc.local
本文转自 15816815732 51CTO博客，原文链接:http://blog.51cto.com/68686789/1717608