1.查看系统安装了哪些程序
rpm -qa rpm -qa | grep xxx
2.卸载程序
rpm -e xxx
rpm –e 是卸载rpm包的命令,后面是名称,最后的版本号可以不用打。
3.Centos下使用locate
今天安装了centos系统,结果
输入:
locate
-bash: locate: command not found
输入:
updatedb
-bash: updatedb: command not found
解决:
yum install mlocate
yum install mlocate
mlocate是新型的locate,updatedb速度更快。
4.systemctl用法
任务 | 旧指令 | 新指令 |
使某服务自动启动 | chkconfig --level 3 httpd on | systemctl enable httpd.service |
使某服务不自动启动 | chkconfig --level 3 httpd off | systemctl disable httpd .service |
检查服务状态 | service httpd status |
systemctl status httpd.service (服务详细信息) systemctl is-active httpd.service (仅显示是否 Active) |
显示所有已启动的服务 | chkconfig --list | systemctl list-units --type=service |
启动某服务 | service httpd start | systemctl start httpd.service |
停止某服务 | service httpd stop | systemctl stop httpd.service |
重启某服务 | service httpd restart | systemctl restart httpd.service |