初始化配置服务器shell脚本
#/bin/bash# 设置时区并同步时间ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime if ! crontab -l |grep ntpdate &>/dev/null ; then (echo "* 1 * * * ntpdate time.windows.com >/dev/null 2>&1";crontab -l) |crontab fi# 禁用selinuxsed -i '/SELINUX/{s/permissive/disabled/}' /etc/selinux/config # 关闭防火墙if egrep "7.[0-9]" /etc/redhat-release &>/dev/null; then systemctl stop firewalld systemctl disable firewalld elif egrep "6.[0-9]" /etc/redhat-release &>/dev/null; then service iptables stop chkconfig iptables off fi# 历史命令显示操作时间if ! grep HISTTIMEFORMAT /etc/bashrc; then echo 'export HISTTIMEFORMAT="%F %T `whoami` "' >> /etc/bashrc fi# SSH超时时间if ! grep "TMOUT=600" /etc/profile &>/dev/null; then echo "export TMOUT=600" >> /etc/profile fi# 禁止root远程登录sed -i 's/#PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config # 禁止定时任务向发送邮件sed -i 's/^MAILTO=root/MAILTO=""/' /etc/crontab # 设置最大打开文件数if ! grep "* soft nofile 65535" /etc/security/limits.conf &>/dev/null; then cat >> /etc/security/limits.conf << EOF * soft nofile 65535 * hard nofile 65535EOF fi# 系统内核优化cat >> /etc/sysctl.conf << EOF net.ipv4.tcp_syncookies = 1net.ipv4.tcp_max_tw_buckets = 20480net.ipv4.tcp_max_syn_backlog = 20480net.core.netdev_max_backlog = 262144net.ipv4.tcp_fin_timeout = 20EOF # 减少SWAP使用echo "0" > /proc/sys/vm/swappiness # 安装系统性能分析工具及其他yum install gcc make autoconf vim sysstat net-tools iostat if
