mirror of
https://github.com/dunwu/linux-tutorial.git
synced 2024-04-15 19:55:24 +08:00
134 lines
3.1 KiB
Bash
134 lines
3.1 KiB
Bash
#!/usr/bin/env bash
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printHeadInfo() {
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cat << EOF
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###################################################################################
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# Linux Centos7 系统配置脚本（根据需要选择）
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# Author: Zhang Peng
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###################################################################################
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EOF
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}
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setLimit() {
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cat >> /etc/security/limits.conf << EOF
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* - nofile 65535
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* - nproc 65535
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EOF
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}
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setLang() {
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cat > /etc/sysconfig/i18n << EOF
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LANG="zh_CN.UTF-8"
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EOF
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}
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closeShutdownShortkey() {
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echo "关闭 Ctrl+Alt+Del 快捷键防止重新启动"
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sed -i 's#exec /sbin/shutdown -r now#\#exec /sbin/shutdown -r now#' /etc/init/control-alt-delete.conf
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}
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closeSelinux() {
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echo "关闭 selinux"
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# see http://blog.51cto.com/13570193/2093299
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sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
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}
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setBootMode() {
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# 1. 停机(记得不要把 initdefault 配置为 0，因为这样会使 Linux 不能启动)
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# 2. 单用户模式，就像 Win9X 下的安全模式
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# 3. 多用户，但是没有 NFS
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# 4. 完全多用户模式，准则的运行级
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# 5. 通常不用，在一些特殊情况下可以用它来做一些事情
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# 6. X11，即进到 X-Window 系统
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# 7. 重新启动 (记得不要把 initdefault 配置为 6，因为这样会使 Linux 不断地重新启动)
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echo "设置 Linux 启动模式"
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sed -i 's/id:5:initdefault:/id:3:initdefault:/' /etc/inittab
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}
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# 配置 IPv4
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configIpv4(){
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echo "配置 ipv4"
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cat >> /etc/sysctl.conf << EOF
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net.ipv4.tcp_tw_reuse = 1
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net.ipv4.tcp_tw_recycle = 1
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net.ipv4.tcp_fin_timeout = 2
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net.ipv4.tcp_syncookies = 1
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net.ipv4.tcp_keepalive_time = 1200
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net.ipv4.tcp_max_syn_backlog = 16384
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net.core.netdev_max_backlog = 16384
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net.core.somaxconn = 32768
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net.core.wmem_default = 8388608
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net.core.rmem_default = 8388608
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net.core.rmem_max = 16777216
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net.core.wmem_max = 16777216
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net.ipv4.tcp_timestamps = 0
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net.ipv4.route.gc_timeout = 100
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net.ipv4.tcp_synack_retries = 1
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net.ipv4.tcp_syn_retries = 1
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net.ipv4.tcp_mem = 94500000 915000000 927000000
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net.ipv4.tcp_max_orphans = 3276800
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net.ipv4.ip_local_port_range = 2000 65535
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net.ipv4.tcp_max_tw_buckets = 5000
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vm.swappiness=10
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EOF
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}
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# 关闭 IPv6
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closeIpv6() {
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echo "关闭 ipv6"
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cat > /etc/modprobe.d/ipv6.conf << EOF
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alias net-pf-10 off
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options ipv6 disable=1
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EOF
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echo "NETWORKING_IPV6=off" >> /etc/sysconfig/network
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}
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# 入口函数
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main() {
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PS3="请选择要执行的操作："
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select ITEM in "设置 DNS" "设置 NTP" "关闭防火墙" "配置 IPv4" "关闭 IPv6" "全部执行"
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do
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case ${ITEM} in
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"设置 DNS")
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${filepath}/set-dns.sh
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;;
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"设置 NTP")
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${filepath}/set-ntp.sh
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;;
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"关闭防火墙")
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${filepath}/stop-firewall.sh
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;;
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"配置 IPv4")
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configIpv4
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;;
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"关闭 IPv6")
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closeIpv6
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;;
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"全部执行")
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${filepath}/set-dns.sh
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${filepath}/set-ntp.sh
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${filepath}/stop-firewall.sh
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configIpv4
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closeIpv6
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;;
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*)
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echo -e "输入项不支持！"
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main
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;;
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esac
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break
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done
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}
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######################################## MAIN ########################################
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filepath=$(cd "$(dirname "$0")"; pwd)
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printHeadInfo
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main
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