有没有做企业网站的,网站开发交付资料,统计工具,wordpress主题失败案例#xff1a;通过脚本实现仅sshd、rsyslog、crond、network、sysstat服务在开机时自启动。
Linux系统在开机的服务通常工作在文本模式3级别#xff0c;因此只需要查找3级别以上的开启的服务即可。查看命令#xff1a;
chkconfig --list |grep 3:on
[rootvm1 ~]# chkco…
案例通过脚本实现仅sshd、rsyslog、crond、network、sysstat服务在开机时自启动。
Linux系统在开机的服务通常工作在文本模式3级别因此只需要查找3级别以上的开启的服务即可。查看命令
chkconfig --list |grep 3:on
[rootvm1 ~]# chkconfig --list |grep 3:onNote: This output shows SysV services only and does not include nativesystemd services. SysV configuration data might be overridden by nativesystemd configuration.If you want to list systemd services use systemctl list-unit-files.To see services enabled on particular target usesystemctl list-dependencies [target].network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
[rootvm1 ~]#默认情况下开启的服务比较少只有network。
[rootvm1 ~]# for name in chkconfig --list |grep 3:on|awk {print $1};do chkconfig --level 3 $name off;doneNote: This output shows SysV services only and does not include nativesystemd services. SysV configuration data might be overridden by nativesystemd configuration.If you want to list systemd services use systemctl list-unit-files.To see services enabled on particular target usesystemctl list-dependencies [target].[rootvm1 ~]# for name in crond network rsyslog sshd sysstat;do chkconfig --level 3 $name on;done
Note: Forwarding request to systemctl enable crond.service.
Note: Forwarding request to systemctl enable rsyslog.service.
Note: Forwarding request to systemctl enable sshd.service.
error reading information on service sysstat: No such file or directory[rootvm1 ~]# chkconfig --list |grep 3:on说明将默认开启的服务都关闭然后开启需要开启的服务。 方法2
[rootvm1 ~]# for name in chkconfig --list|grep 3:on|awk {print $1}|grep -vE crond|network|sshd|rsyslog|sysstat;do chkconfig $name off;doneNote: This output shows SysV services only and does not include nativesystemd services. SysV configuration data might be overridden by nativesystemd configuration.If you want to list systemd services use systemctl list-unit-files.To see services enabled on particular target usesystemctl list-dependencies [target].Linux系统管理员需要遵循的原则是最小化原则尽量不安装不使用的软件尽量不开启不需要开启的服务只要不用就不开启。 我们再理解下for循环语句的结构。chkconfig命令获取到取值变量列表然后for循环语句“遍历”这个列表进行处理。
