linux常用命令 centos 安装 rar命令 一般CentOS7是不支持解压rar的文件，这需要安装插件rarlinux。
1 2 3 4 5 6 wget https://www.rarlab.com/rar/rarlinux-x64-611.tar.gz wget https://www.rarlab.com/rar/rarlinux-x64-611.tar.gz --no-check-certificate tar -xf rarlinux-x64-611.tar.gz cd rar make rar x collection.rar
rpm 1 2 3 4 5 6 7 # rpm -qa用于列出所有已安装的软件包 rpm -qa | grep -i mysql # -i 忽略大小写 yum list installed | grep mysql yum remove mysql-xxx mysql-xxx mysql-xxx mysql-xxxx # 移除对应的软件
systemctl 1 2 3 4 5 6 7 8 9 10 11 12 13 systemctl status mysqld.service # 检查mysq服务状态 systemctl stop mysqld.service # 关闭mysql # 加不加.service后缀都可以 启动：systemctl start mysqld.service 关闭：systemctl stop mysqld.service 重启：systemctl restart mysqld.service 查看状态：systemctl status mysqld.service # 查看是否开机自启 systemctl list-unit-files|grep mysqld.service systemctl enable mysqld.service systemctl disable mysqld.service
firewalld 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 CentOS6 ： service iptables stop CentOS7： systemctl start firewalld.service systemctl status firewalld.service systemctl stop firewalld.service # 设置开机启用防火墙 systemctl enable firewalld.service # 设置开机禁用防火墙 systemctl disable firewalld.service # 查看开放的端口号 firewall-cmd --list-all # 设置开放的端口号 firewall-cmd --add-service=http --permanent firewall-cmd --add-port=3306/tcp --permanent # 重启防火墙 firewall-cmd --reload
更换yum源 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 [root@localhost yum.repos.d]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup [root@localhost yum.repos.d]# ll total 40 -rw-r--r--. 1 root root 1664 Nov 23 2020 CentOS-Base.repo.backup -rw-r--r--. 1 root root 1309 Nov 23 2020 CentOS-CR.repo -rw-r--r--. 1 root root 649 Nov 23 2020 CentOS-Debuginfo.repo -rw-r--r--. 1 root root 314 Nov 23 2020 CentOS-fasttrack.repo -rw-r--r--. 1 root root 630 Nov 23 2020 CentOS-Media.repo -rw-r--r--. 1 root root 1331 Nov 23 2020 CentOS-Sources.repo -rw-r--r--. 1 root root 8515 Nov 23 2020 CentOS-Vault.repo -rw-r--r--. 1 root root 616 Nov 23 2020 CentOS-x86_64-kernel.repo [root@localhost yum.repos.d]# curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 2523 100 2523 0 0 25184 0 --:--:-- --:--:-- --:--:-- 25230 [root@localhost yum.repos.d]# [root@localhost yum.repos.d]# ll total 44 -rw-r--r--. 1 root root 2523 Sep 5 11:45 CentOS-Base.repo -rw-r--r--. 1 root root 1664 Nov 23 2020 CentOS-Base.repo.backup -rw-r--r--. 1 root root 1309 Nov 23 2020 CentOS-CR.repo -rw-r--r--. 1 root root 649 Nov 23 2020 CentOS-Debuginfo.repo -rw-r--r--. 1 root root 314 Nov 23 2020 CentOS-fasttrack.repo -rw-r--r--. 1 root root 630 Nov 23 2020 CentOS-Media.repo -rw-r--r--. 1 root root 1331 Nov 23 2020 CentOS-Sources.repo -rw-r--r--. 1 root root 8515 Nov 23 2020 CentOS-Vault.repo -rw-r--r--. 1 root root 616 Nov 23 2020 CentOS-x86_64-kernel.repo [root@localhost yum.repos.d]# # 清除yum缓存 [root@localhost yum.repos.d]# yum clean all Loaded plugins: fastestmirror Cleaning repos: base extras updates Cleaning up list of fastest mirrors [root@localhost yum.repos.d]# # 缓存阿里云源 [root@localhost yum.repos.d]# yum makecache [root@localhost yum.repos.d]# # 测试阿里云源 [root@localhost yum.repos.d]# yum list
Centos6 VS Centos7 1 2 1. 防火墙：6是iptables，7是firewalld 2. 启动服务的命令：6是service，7是systemctl
参考链接
https://www.jianshu.com/p/5eb37a4b8c2c
