Linux-CentOS 7.6 系统初始化脚本

#!/bin/bash ## 报错：-bash: ./backdate.sh: /bin/bash^M: bad interpreter: No such file or directory ## 解决方法: vim或者vi的命令模式下，输入命令set fileformat=unix即可解决换行问题 echo -e "\e[1;31m【----------------------------------------在opt和var创建backdate文件夹】\e[0m" sleep 1 #暂停1秒 mkdir -p /opt/backdate mkdir -p /var/backdate mkdir -p /usr/local/script echo -e "\e[1;31m【----------------------------------------禁用防火墙】\e[0m" sleep 1 if systemctl status firewalld.service | grep running then systemctl stop firewalld.service systemctl disable firewalld.service fi systemctl status firewalld #stop本次停用，disable开机时禁用 echo -e "\e[1;32m【----------------------------------------修改selinux】\e[0m" sleep 1 sed -i '/^SELINUX=/c SELINUX=disabled' /etc/selinux/config #安全增强型 Linux（Security-Enhanced Linux）简称 SELinux，它是一个 Linux 内核模块，也是 Linux 的一个安全子系统 #参数-i可以直接修改源文件，不输出，由于SELinux 的结构及配置非常复杂，所以这边直接将其关掉 echo -e "\e[1;32m【----------------------------------------安装wget】\e[0m" sleep 1 yum install wget -y #下载wget，wget命令是Linux系统用于从Web下载文件的命令行工具 echo -e "\e[1;33m【----------------------------------------修改yum源】\e[0m" sleep 1 mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup #备份初始的源文件CentOS-Base.repo（重命名） wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo #参数：-O重命名下载后的文件，使用wget获取阿里yum源配置文件（适用CentOS7） yum clean all #清除缓存 yum makecache #更新软件包缓存 echo -e "\e[1;33m【----------------------------------------安装常用软件】\e[0m" yum install man man-pages ntp vim lrzsz zip unzip telnet perl net-tools -y echo -e "\e[1;34m【----------------------------------------同步系统时间】\e[0m" yum ntpdate cn.ntp.org.cn #yum info ntp && ntpdate cn.ntp.org.cn echo -e "\e[1;34m【----------------------------------------DNS域名配置】\e[0m" sleep 1 echo "192.168.12.100 basenode" >> /etc/hosts echo "192.168.12.101 node1" >> /etc/hosts echo "192.168.12.102 node2" >> /etc/hosts echo "192.168.12.103 node3" >> /etc/hosts #设置四台主机的DNS用于后期相互免密钥 #按照自己的DNS自行修改 echo -e "\e[1;34m【----------------------------------------RPM安装JDK】\e[0m" sleep 1 #wget https://download.oracle.com/java/18/latest/jdk-18_linux-x64_bin.rpm rpm -ivh jdk-18_linux-x64_bin.rpm echo 'export JAVA_HOME=/usr/java//usr/java/jdk-18.0.2' >> /etc/profile echo 'export PATH=$JAVA_HOME/bin:$PATH' >> /etc/profile #配置Java的环境变量，/usr/java/jdk-18.0.2为Java所在的路径 source /etc/profile #重新加载配置文件 echo $PATH #查看是否配置成功 echo -e "\e[1;35m【----------------------------------------压缩包tar.gz安装Tomcat】\e[0m" sleep 1 #wget https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.65/bin/apache-tomcat-9.0.65.tar.gz tar -zxvf apache-tomcat-9.0.65.tar.gz mv apache-tomcat-9.0.65 /opt/backdate #使用tar命令解压，剪切到/opt/backdate目录下 if /opt/apache-tomcat-9.0.65/bin/startup.sh | grep 'Tomcat started' then echo 'Tomcat has started' else echo 'Tomcat is not started' fi #验证Tomcat是否安装成功 echo -e "\e[1;35m【----------------------------------------压缩包tar.gz安装Mysql】\e[0m" sleep 1 #wget https://cdn.mysql.com/archives/mysql-8.0/mysql-8.0.28-1.el7.x86_64.rpm-bundle.tar rpm -e --nodeps `rpm -qa | grep mariadb` #系统自带MariaDB数据库管理系统，为了不起冲突先把这个包卸掉 tar -xvf mysql-8.0.28-1.el7.x86_64.rpm-bundle.tar #cd mysql-8.0.28-1.el7.x86_64/ rpm -ivh mysql-community-common-8.0.28-1.el7.x86_64.rpm rpm -ivh mysql-community-libs-8.0.28-1.el7.x86_64.rpm --nodeps --force #安装Lib库，这里会报错，缺乏依赖项，所以需要加上一段参数--nodeps --force忽视依赖项。 rpm -ivh mysql-community-client-8.0.28-1.el7.x86_64.rpm --nodeps --force rpm -ivh mysql-community-server-8.0.28-1.el7.x86_64.rpm --nodeps --force systemctl start mysqld systemctl enable mysqld #设置为开机启动Mysql temppasswd=`grep "A temporary password" /var/log/mysqld.log | awk '{ print $NF}'` #在mysqld.log中搜索密码，打印最后一列（NF），也就是密码 alter user 'root'@'localhost' identified by '{qwertyuiopQWERTYUIOP1234567890!@#$%^&*}'; alter user 'root'@'localhost' identified by '{temppassword_(123456)}'; #连接mysql方法一 #touch mysql.conf #echo '[client]' >> ./mysql.conf #echo 'user = "root"' >> ./mysql.conf #echo 'password = "$temppasswd"' >> ./mysql.conf #echo 'host = "localhost"' >> ./mysql.conf #mysql --defaults-file=mysql.conf #连接mysql方法二 #MYSQL_PWD="$temppasswd" mysql --user=root #连接mysql方法三 mysql -uroot -p$temppasswd --connect-expired-password << EOF alter user 'root'@'localhost' identified by '{Temppassword_123456}'; set global validate_password.policy=low; set global validate_password.length=6; ALTER USER 'root'@'localhost' IDENTIFIED BY '123456' PASSWORD EXPIRE NEVER; ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456'; FLUSH PRIVILEGES; use mysql; update user set host='%' where user = 'root'; commit; quit EOF #EOF内的语句会被当作Mysql语句 systemctl restart mysqld echo -e "\e[1;36m【----------------------------------------设置开机启动项-更新时间】\e[0m" sleep 1 mkdir -p /usr/local/scripts touch /usr/local/script/auto_ntpdate.sh echo '#!/bin/bash' >> /usr/local/script/auto_ntpdate.sh echo 'yum info ntp && ntpdate cn.ntp.org.cn' >> /usr/local/script/auto_ntpdate.sh chmod a+x /usr/local/script/auto_ntpdate.sh echo '/usr/local/script/auto_ntpdate.sh' >> /etc/rc.local chmod a+x /etc/rc.local echo -e "\e[1;36m【----------------------------------------删除文件】\e[0m" sleep 1 rm -rf apache-tomcat-9.0.65.tar.gz rm -rf jdk-18_linux-x64_bin.rpm rm -rf mysql* rm -rf *.sh echo -e "\e[1;36m【----------------------------------------关闭计算器，拍快照】\e[0m" sleep 1 shutdown -h now