#!/bin/bash
#
#********************************************************************
#Author:zhangzhuo
#QQ: 1191400158
#Date: 2020-12-18
#FileName：reset_Linux_OS_v4.sh
#URL: [https://www.zhangzhuo.ltd](https://www.zhangzhuo.ltd)
#Description：The test script
#Copyright (C): 2020 All rights reserved
#********************************************************************
Centos(){
centos_Version(){
Version=`grep -Eo "[0-9].[0-9]" /etc/redhat-release | tr '.' '%' | tr '\n' % |cut -d% -f 1`
#Version=`sed -nr 's/.* ([0-9])\..*/\1/p' /etc/redhat-release`
}
centos_PS1(){
grep PS1 ~/.bash_profile &>/dev/null
if [ ? = 1 ];then
echo 'export PS1="\[\e[1;32m\][\[\e[0m\]\t \[\e[1;33m\]\u\[\e[36m\]@\h\[\e[1;31m\] \W\[\e[1;32m\]]\[\e[0m\]\\"' >>~/.bash_profile
echo -e "\033[1;31m1)提示符配置已经完成请使用su -命令进行生效\033[0m"
else
echo -e "\033[1;31m1)提示符已经配置无需重新配置\033[0m"
fi
}
centos_hostname(){
centos_Version
num=0
while [ num -ne 1 -a num -ne 2 ];do
read -p "您是否要自己设置主机名？(1是2否):" num
if [ num = 1 ];then
read -p "请输入主机名: " hostname
case {Version} in
8|7)
hostnamectl set-hostname $hostname
echo -e "\033[1;31m2)主机名设置完成\033[0m,\033[1;32m请使用su -命令进行生效\033[0m"
;;
6)
sed -i "/H/s@(^H.*=).*{hostname}" /etc/sysconfig/network
echo -e "\033[1;31m2)主机名设置完成\033[0m,\033[1;32m请重新启动系统\033[0m"
;;
*)
echo -e "\033[1;31m2,3)您的系统不是Centos6, 7, 8!!!\033[0m"
esac
elif [ {Version} in
8|7)
hostnamectl set-hostname centos8
if [ $Version = 7 ];then
hostnamectl set-hostname centos7
fi
echo -e "\033[1;31m2)主机名设置完成\033[0m,\033[1;32m请使用su -命令进行生效\033[0m"
;;
6)
sed -i '/H/s@(^H.*=).*{Version} in
8|7)
systemctl stop firewalld
systemctl disable firewalld &>/dev/null
echo -e "\033[1;31m3)防火墙关闭完成\033[0m"
;;
6)
service iptables stop
chkconfig iptables off
echo -e "\033[1;31m3)防火墙关闭完成\033[0m"
;;
*)
echo -e "\033[1;31m2,3)您的系统不是Centos6, 7, 8!!!\033[0m"
esac
}
centos_selinux(){
sed -i '/SELINUX=/s@(^S.*=).*? = 0 ];then
Version=`grep -Eo "[0-9].[0-9]" /etc/redhat-release | tr '.' '%' | tr '\n' % |cut -d% -f 1`
if [ $Version = 8 ];then
mkdir -p /etc/yum.repos.d/yum-Backup
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/yum-Backup/ &>/dev/null
curl -o /etc/yum.repos.d/CentOS-Base.repo [https://mirrors.aliyun.com/repo/Centos-8.repo](https://mirrors.aliyun.com/repo/Centos-8.repo) &>/dev/null
echo -e "\033[1;31m4)阿里源设置完成\033[0m, \033[1;32m之前的配置文件存放在/etc/yum.repo.d/yum-Backup目录下\033[0m"
elif [ Version = 6 ];then
mkdir -p /etc/yum.repos.d/yum-Backup
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/yum-Backup/ &>/dev/null
curl -o /etc/yum.repos.d/CentOS-Base.repo [https://mirrors.aliyun.com/repo/Centos-6.repo](https://mirrors.aliyun.com/repo/Centos-6.repo) &>/dev/null
echo -e "\033[1;31m4)阿里源设置完成\033[0m, \033[1;32m之前的配置文件存放在/etc/yum.repo.d/yum-Backup目录下\033[0m"
fi
else
echo -e "\033[1;31m4)YUM配置失败，请检查网络连接\033[0m"
fi
}
centos_yum_install(){
yum install gcc make autoconf gcc-c++ glibc glibc-devel pcre pcre-devel openssl openssl-devel systemd-devel zlib-devel vim lrzsz tree tmux lsof tcpdump net-tools bc bzip2 zip unzip nfs-utils man-pages apr* redhat-rpm-config bash-completion bash-completion epel-release chrony -y
echo -e "\033[1;31m5)常用软件安装完成\033[0m"
}
centos_vim(){
if [ -e /usr/bin/vim ];then
cat >~/.vimrc<<EOF
set ignorecase
set cursorline
set autoindent
set number
set paste
set et
set ts=4
autocmd BufNewFile *.sh exec ":call SetTitle()"
func SetTitle()
if expand("%:e") == 'sh'
call setline(1,"#!/bin/bash")
call setline(2,"#")
call setline(3,"#********************************************************************")
call setline(4,"#Author:zhangzhuo")
call setline(5,"#QQ: 1191400158")
call setline(6,"#Date: ".strftime("%Y-%m-%d"))
call setline(7,"#FileName：".expand("%"))
call setline(8,"#URL: [https://www.zhangzhuo.ltd](https://www.zhangzhuo.ltd)")
call setline(9,"#Description：The test script")
call setline(10,"#Copyright (C): ".strftime("%Y")." All rights reserved")
call setline(11,"#********************************************************************")
call setline(12,"set -ue")
endif
endfunc
autocmd BufNewFile * normal G
EOF
echo -e "\033[1;31m6)VIM配置完成\033[0m"
else
echo -e "\033[1;34m6)警告:\033[0m\033[1;31m请先安装VIM软件\033[0m"
fi
}
centos_alias(){
cat <<EOF>>~/.bashrc
alias diskadd="echo '- - -' > /sys/class/scsi_host/host0/scan; echo '- - -' > /sys/class/scsi_host/host1/scan ; echo '- - -' > /sys/class/scsi_host/host2/scan"
alias df='df -h'
alias cdnet='cd /etc/sysconfig/network-scripts/'
alias free='free -h'
EOF
echo -e "\033[1;31m7)别名配置完成,\033[0m\033[1;32m 请使用source ~/.bashrc命令进行生\033[0m"
}
centos_net_name(){
grep 'net.ifnames=0 biosdevname=0' /etc/default/grub &>/dev/null
if [ # net.ifnames=0 biosdevname=0"#' /etc/default/grub
grub2-mkconfig -o /boot/grub2/grub.cfg
mv /etc/sysconfig/network-scripts/ifcfg-`ip a | grep -Eo "[0-9]:.*e.*:" | tr -d ' ' | cut -d: -f2` /etc/sysconfig/network-scripts/ifcfg-eth0
sed -ri '/NAME=/s#(".*")$#"eth0"#' /etc/sysconfig/network-scripts/ifcfg-eth0
sed -ri '/DEVICE=/s#(".*")$#"eth0"#' /etc/sysconfig/network-scripts/ifcfg-eth0
echo -e '\e[1;31m网卡名已经修改完成,重启电脑生效！\e[0m'
else
echo -e '\e[1;31m网卡名已经修改无需重新修改！\e[0m'
fi
}
centos_net_ip(){
while :;do
read -p "请输入要设置的网卡名称: " NET_NAME
{ nmcli connection | grep -E "\b$NET_NAME\b" >/dev/null; } && break || echo "请重新输入正确且存在>的网卡名称！"
done
while :;do
read -p "请输入要修改的IP地址: " IP
{ echo ">/dev/null; } && break || echo "请输入正确的IP地址！"
done
while :;do
read -p "请输入子网掩码(0-32): " MASK
[ $MASK -le 32 ] && break || echo "输入错误请重新输入！"
done
while :;do
read -p "请输入网关: " GATEWAY
{ echo ">/dev/null; } && break || echo "请输入正确的网关！"
done
nmcli connection modify {IP}/{GATEWAY} ipv4.dns 114.114.114.114 && nmcli connection reload >/dev/null && nmcli connection up aset from=[zz15049236211@163.com](mailto:zz15049236211@163.com)' /etc/mail.rc
sed -i 'aset smtp-auth-user=[zz15049236211@163.com](mailto:zz15049236211@163.com)' /etc/mail.rc
sed -i '$aset smtp-auth-password=RESVITPPKPFLZZMP' /etc/mail.rc
systemctl restart postfix && echo "服务安装启动完成！" || echo "未知错误请检查！"
else
echo "/etc/mail.rc配置文件不存在请检查！"
fi
}
centos_optimize(){
cat >/etc/security/limits.conf<<EOF
* soft core unlimited
* hard core unlimited
* soft nproc 1000000
* hard nproc 1000000
* soft nofile 1000000
* hard nofile 1000000
* soft memlock 32000
* hard memlock 32000
* soft msgqueue 8192000
EOF
echo -e "\033[1;31m资源限制优化完成,重启生效\033[0m"
cat >/etc/sysctl.conf<<EOF
#ontrols source route verification
net.ipv4.conf.default.rp_filter = 1
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1
# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0
# Controls the System Request debugging functionality ofthe kernel
kernel.sysrq = 0
# Controls whether core dumps will append the PID to thecore filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1
# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1
# Disable netfilter on bridges.
#net.bridge.bridge-nf-call-ip6tables = 0
#net.bridge.bridge-nf-call-iptables = 0
#net.bridge.bridge-nf-call-arptables = 0
# Controls the default maxmimum size of a mesage queue
kernel.msgmnb = 65536
# # Controls the maximum size of a message, in bytes
kernel.msgmax = 65536
# Controls the maximum shared segment size, in bytes
kernel.shmmax = 68719476736
# # Controls the maximum number of shared memory segments,in pages
kernel.shmall = 4294967296
# TCP kernel paramater
net.ipv4.tcp_mem = 786432 1048576 1572864
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_sack = 1
# socket buffer
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 20480
net.core.optmem_max = 81920
# TCP conn
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_syn_retries = 3
net.ipv4.tcp_retries1 = 3
net.ipv4.tcp_retries2 = 15
# tcp conn reuse
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_tw_reuse = 0
#Linux 从4.12内核版本开始移除了 tcp_tw_recycle 配置
#net.ipv4.tcp_tw_recycle = 0
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_max_tw_buckets = 20000
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syncookies = 1
# keepalive conn
net.ipv4.tcp_keepalive_time = 300
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.ip_local_port_range = 10001 65000
EOF
echo -e "\033[1;31m优化内核参数完成\033[0m"
}
PS3="请选择相应的编号(1-15):"
MENU="
Centos设置终端提示符
CentOS设置主机名
CentOS关闭防火墙
CentOS关闭SLINUX
CentOS1-4全执行
CentOS设置YUN源(阿里源)
CentOS最小安装安装常用软件
Centos设置VIM
CentOS配置别名
CentOS重设网卡名称
CentOS设置网卡IP地址(如果执行完10请先重启在执行此项)
CentOS设置邮箱代理
CentOS系统优化(资源限制优化与内核参数优化)
重启系统
退出
"
select menu in REPLY in
1)
centos_PS1
;;
2)
centos_hostname
;;
3)
centos_firewalld
;;
4)
centos_selinux
;;
5)
centos_PS1
centos_hostname
centos_firewalld
centos_selinux
;;
6)
centos_yum
;;
7)
centos_yum_install
;;
8)
centos_vim
;;
9)
centos_alias
;;
10)
centos_net_name
;;
11)
centos_net_ip
;;
12)
mail_set
;;
13)
centos_optimize
;;
14)
init 6
;;
15)
break
;;
*)
echo -e "\e[1;31m输入错误,请输入正确的数字(1-15)!\e[0m"
;;
esac
done
}
Ubuntu(){
ubuntu_version(){
VERSION=`sed -En '/^VERSION_ID=/s@.*"([0-9]+.[0-9]+)".*@\1@p' /etc/os-release`
}
ubuntu_PS1(){
grep PS1 ~/.profile &>/dev/null
if [ "' >>~/.profile
echo -e "\033[1;31m终端提示符配置完成！\033[0m"
else
echo -e "\033[1;31m终端提示符已经配置无需重新配置！\033[0m"
fi
}
ubuntu_hostname(){
ubuntu_version
num=0
while [ num -ne 2 ];do
read -p "您是否要自己设置主机名？(1是2否):" num
if [ {VERSION} in
20.04|18.04)
hostnamectl set-hostname num = 2 ];then
case VERSION = 18.04 ];then
hostnamectl set-hostname ubuntu18-04
fi
echo -e "\033[1;31m主机名设置完成\033[0m,\033[1;32m请使用su -命令进行生效\033[0m"
;;
*)
echo -e "\033[1;31m您的系统不是Ubuntu20.04 18.04!!!\033[0m"
esac
else
echo "选择错误请重新选择！！！"
fi
done
}
ubuntu_root(){
read -p "请输入root密码: " ROOTPASSWD
echo -e "{ROOTPASSWD}" |sudo passwd root &>/dev/null
sed -Ei '/#PermitRootLogin/s@#(.*)\ .*@\1 yes@' /etc/ssh/sshd_config
systemctl restart sshd
echo -e '\e[1;31mroot密码已经设置完成，并且可以远程登录\e[0m'
}
ubuntu_apt(){
ping -c2 baidu.com &>/dev/null
if [ $? = 0 ];then
sed -Eni.bak '/[#]/s@(^.*\ )(.*)(/ubuntu.*)@\1[http://mirrors.aliyun.com](http://mirrors.aliyun.com)\3@p' /etc/apt/sources.list
apt update
echo -e '\e[1;31m阿里源设置完成! \e[0m'
else
sed -Eni.bak '/[#]/s@(^.*\ )(.*)(/ubuntu.*)@\1[http://mirrors.aliyun.com](http://mirrors.aliyun.com)\3@p' /etc/apt/sources.list
echo -e "\033[1;31m阿里源设置完成，但是请检查你的网络连接！\033[0m"
fi
}
ubuntu_vim(){
if [ -e /usr/bin/vim ];then
cat >~/.vimrc<<EOF
set ignorecase
set cursorline
set autoindent
set number
set paste
set et
set ts=4
autocmd BufNewFile *.sh exec ":call SetTitle()"
func SetTitle()
if expand("%:e") == 'sh'
call setline(1,"#!/bin/bash")
call setline(2,"#")
call setline(3,"#********************************************************************")
call setline(4,"#Author:zhangzhuo")
call setline(5,"#QQ: 1191400158")
call setline(6,"#Date: ".strftime("%Y-%m-%d"))
call setline(7,"#FileName：".expand("%"))
call setline(8,"#URL: [https://www.zhangzhuo.ltd](https://www.zhangzhuo.ltd)")
call setline(9,"#Description：The test script")
call setline(10,"#Copyright (C): ".strftime("%Y")." All rights reserved")
call setline(11,"#********************************************************************")
call setline(12,"set -ue")
endif
endfunc
autocmd BufNewFile * normal G
EOF
echo -e "\033[1;31mVIM配置完成\033[0m"
else
echo -e "\033[1;34m警告：\033[0m\033[1;31请先安装VIM\033[0m"
fi
}
ubuntu_alias(){
cat <<EOF>>~/.bashrc
df='df -h'
EOF
echo -e "\033[1;31m别名配置完成,请使用source ~/.bashrc生效\033[0m"
}
ubuntu_install(){
apt install iproute2 ntpdate tcpdump telnet traceroute nfs-kernel-server nfs-common lrzsz tree openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev gcc openssh-server iotop unzip zip libaprutil1-dev libapr1-dev
apt install make
apt install make-guile
echo -e "\033[1;31m常用软件安装完成\033[0m"
}
ubuntu_net_name(){
sed -ri '/GRUB_CMDLINE_LINUX=""/s@"(.*)"@"net.ifnames=0 biosdevname=0"@' /etc/default/grub
grub-mkconfig -o /boot/grub/grub.cfg
name=`ip a | grep -o "^[0-9]: e.*:" | tr -d ' ' | cut -d: -f2`
for i in /etc/netplan/*;do
sed -ri "s/i;
done
echo -e "\033[1;31m设置完成请重新启动系统\033[0m"
}
ubuntu_optimize(){
cat >/etc/security/limits.conf<<EOF
* soft core unlimited
* hard core unlimited
* soft nproc 1000000
* hard nproc 1000000
* soft nofile 1000000
* hard nofile 1000000
* soft memlock 32000
* hard memlock 32000
* soft msgqueue 8192000
root soft core unlimited
root hard core unlimited
root soft nproc 1000000
root hard nproc 1000000
root soft nofile 1000000
root hard nofile 1000000
root soft memlock 32000
root hard memlock 32000
root soft msgqueue 8192000
EOF
echo -e "\033[1;31m资源限制优化完成,重启生效\033[0m"
cat >/etc/sysctl.conf<<EOF
# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1
# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0
# Controls the System Request debugging functionality ofthe kernel
kernel.sysrq = 0
# Controls whether core dumps will append the PID to thecore filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1
# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1
# Disable netfilter on bridges.
#net.bridge.bridge-nf-call-ip6tables = 0
#net.bridge.bridge-nf-call-iptables = 0
#net.bridge.bridge-nf-call-arptables = 0
# Controls the default maxmimum size of a mesage queue
kernel.msgmnb = 65536
# # Controls the maximum size of a message, in bytes
kernel.msgmax = 65536
# Controls the maximum shared segment size, in bytes
kernel.shmmax = 68719476736
# # Controls the maximum number of shared memory segments,in pages
kernel.shmall = 4294967296
# TCP kernel paramater
net.ipv4.tcp_mem = 786432 1048576 1572864
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_sack = 1
# socket buffer
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 20480
net.core.optmem_max = 81920
# TCP conn
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_syn_retries = 3
net.ipv4.tcp_retries1 = 3
net.ipv4.tcp_retries2 = 15
# tcp conn reuse
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_tw_reuse = 0
#Linux 从4.12内核版本开始移除了 tcp_tw_recycle 配置
#net.ipv4.tcp_tw_recycle = 0
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_max_tw_buckets = 20000
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syncookies = 1
# keepalive conn
net.ipv4.tcp_keepalive_time = 300
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.ip_local_port_range = 10001 65000
EOF
echo -e "\033[1;31m优化内核参数完成\033[0m"
}
PS3="请选择相应的编号(1-12):"
MENU="
Ubuntu设置终端提示符
Ubuntu配置主机名(需要以sudo执行脚本)
Ubuntu设置root密码并且允许root远程登录(需要以sudo执行脚本)
Ubuntu设置阿里源(需要以sudo执行脚本)
Ubuntu安装常用软件(需要以sudo执行脚本)
Ubuntu配置VIM
Ubuntu配置别名
Ubuntu修改网卡名称(需要以sudo执行脚本)
Ubuntu系统优化(资源限制与内核优化)
执行1,6,7!
重启系统(需要以sudo执行脚本)
退出
"
select menu in REPLY in
1)
ubuntu_PS1
;;
2)
ubuntu_hostname
;;
3)
ubuntu_root
;;
4)
ubuntu_apt
;;
5)
ubuntu_install
;;
6)
ubuntu_vim
;;
7)
ubuntu_alias
;;
8)
ubuntu_net_name
;;
9)
ubuntu_optimize
;;
10)
ubuntu_PS1
ubuntu_vim
ubuntu_alias
;;
11)
reboot
;;
12)
break
;;
*)
echo -e "\e[1;31m输入错误,请输入正确的数字(1-12)!\e[0m"
;;
esac
done
}
man(){
[ -f /etc/os-release ] || { echo -e "\e[1;31m未知错误正在退出....!\e[0m";exit; }
centos=`cat /etc/os-release |grep -o centos |head -1`
ubuntu=`cat /etc/os-release |grep -o ubuntu |head -1`
if [ centos正在执行脚本.....\e[0m"
Centos
elif [ ubuntu正在执行脚本.....\e[0m"
Ubuntu
else
echo -e "\e[1;31m您当前的系统不适合执行此脚本.....\e[0m"
fi
}
man
