RHCE7 -- systemctl命令

查询所有单元的状态:

[root@rhce7 ~]# systemctl
UNIT                                                  LOAD   ACTIVE SUB       DESCRIPTION
proc-sys-fs-binfmt_misc.automount                     loaded active waiting   Arbitrary Executable File Formats File System Automoun
sys-devices-pci00...get1:0:0-1:0:0:0-block-sr0.device loaded active plugged   VBOX_CD-ROM
sys-devices-pci0000:00-0000:00:03.0-net-enp0s3.device loaded active plugged   PRO/1000 MT Desktop Adapter
sys-devices-pci00...0-0000:00:05.0-sound-card0.device loaded active plugged   82801AA AC'97 Audio Controller
sys-devices-pci0000:00-0000:00:08.0-net-enp0s8.device loaded active plugged   PRO/1000 MT Desktop Adapter
sys-devices-pci00...0:0-2:0:0:0-block-sda-sda1.device loaded active plugged   VBOX_HARDDISK
sys-devices-pci00...0:0-2:0:0:0-block-sda-sda2.device loaded active plugged   LVM PV ewUQqv-N1i5-9xcA-GRad-2BLV-qOTh-vNPOd2 on /dev/
sys-devices-pci00...get2:0:0-2:0:0:0-block-sda.device loaded active plugged   VBOX_HARDDISK
sys-devices-platform-serial8250-tty-ttyS0.device      loaded active plugged   /sys/devices/platform/serial8250/tty/ttyS0...

仅查询服务单元的状态:

[root@rhce7 ~]# systemctl --type=service
UNIT                                                   LOAD   ACTIVE SUB     DESCRIPTION
abrt-ccpp.service                                      loaded active exited  Install ABRT coredump hook
abrt-oops.service                                      loaded active running ABRT kernel log watcher
abrt-xorg.service                                      loaded active running ABRT Xorg log watcher
abrtd.service                                          loaded active running ABRT Automated Bug Reporting Tool
accounts-daemon.service                                loaded active running Accounts Service
...

查看处于失败或维护状态的任何单元:

[root@rhce7 ~]# systemctl status rngd.service -l
rngd.service - Hardware RNG Entropy Gatherer DaemonLoaded: loaded (/usr/lib/systemd/system/rngd.service; enabled)Active: failed (Result: exit-code) since Fri 2015-07-17 11:08:27 CST; 32min agoProcess: 649 ExecStart=/sbin/rngd -f (code=exited, status=1/FAILURE)Main PID: 649 (code=exited, status=1/FAILURE)CGroup: /system.slice/rngd.serviceJul 17 11:08:25 rhce7.example.com systemd[1]: Started Hardware RNG Entropy Gatherer Daemon.
Jul 17 11:08:27 rhce7.example.com rngd[649]: Unable to open file: /dev/tpm0
Jul 17 11:08:27 rhce7.example.com rngd[649]: can't open any entropy source
Jul 17 11:08:27 rhce7.example.com rngd[649]: Maybe RNG device modules are not loaded
Jul 17 11:08:27 rhce7.example.com systemd[1]: rngd.service: main process exited, code=exited, status=1/FAILURE
Jul 17 11:08:27 rhce7.example.com systemd[1]: Unit rngd.service entered failed state.
[root@rhce7 ~]#

查看特定单元是否活动:

[root@rhce7 ~]# systemctl is-active sshd
active

查看特定单元是否已经开启自启动:

[root@rhce7 ~]# systemctl is-enabled sshd
enabled

列出所有已经加载单元的活动状态

[root@rhce7 ~]# systemctl list-units --type=service
UNIT                         LOAD   ACTIVE SUB     DESCRIPTION
abrt-ccpp.service            loaded active exited  Install ABRT coredump hook
abrt-oops.service            loaded active running ABRT kernel log watcher
abrt-xorg.service            loaded active running ABRT Xorg log watcher
abrtd.service                loaded active running ABRT Automated Bug Reporting
accounts-daemon.service      loaded active running Accounts Service
alsa-state.service           loaded active running Manage Sound Card State (rest
atd.service                  loaded active running Job spooling tools

查看所有单元的已启用和已禁用设置

[root@rhce7 ~]# systemctl list-unit-files --type=service
UNIT FILE                                   STATE
abrt-ccpp.service                           enabled
abrt-oops.service                           enabled
abrt-pstoreoops.service                     disabled
abrt-vmcore.service                         enabled
abrt-xorg.service                           enabled
abrtd.service                               enabled
accounts-daemon.service                     enabled
alsa-restore.service                        static

查看失败的服务的状态

[root@rhce7 ~]# systemctl list-unit-files --type=service
UNIT FILE                                   STATE
abrt-ccpp.service                           enabled
abrt-oops.service                           enabled
abrt-pstoreoops.service                     disabled
abrt-vmcore.service                         enabled
abrt-xorg.service                           enabled
abrtd.service                               enabled
accounts-daemon.service                     enabled
alsa-restore.service                        static

屏蔽服务
有时候可能安装了互相冲突的服务，比如network和NetworkManager，iptables和firewalld
可以将服务屏蔽。屏蔽将在配置目录中创建链接，使的启动该服务时不发生任何事

[root@rhce7 ~]# systemctl mask network
ln -s '/dev/null' '/etc/systemd/system/network.service'
[root@rhce7 ~]# systemctl unmask network
rm '/etc/systemd/system/network.service'

禁用服务

[root@rhce7 ~]# systemctl disable network
network.service is not a native service, redirecting to /sbin/chkconfig.
Executing /sbin/chkconfig network off
[root@rhce7 ~]#

禁用服务和屏蔽服务的区别：

·禁用服务：服务不会再系统系统的时候自动启动，也不会被其它单元文件启动，但可以手动启动

·屏蔽服务：无法手动启动，也无法自启动

RHCE7 -- systemctl命令相关推荐

Linux之systemctl命令的使用
1.列出单元命令说明 systemctl list-units 列出所有运行单元 systemctl list-unit-files 列出所有可用单元 systemctl --failed 列出所 ...
Redhat7 systemctl命令
Redhat7 systemctl命令: 启动.停止.重启.查看状态: # systemctl start\stop\restart\status httpd 激活服务: # systemctl is ...
systemctl 命令完全指南
参考文章:https://linux.cn/article-5926-1.html systemctl start redis.service #启动redis服务器 systemctl stop r ...
【Linux】一步一步学Linux——systemctl命令(147)
00. 目录文章目录 00. 目录 01. 命令概述 02. 命令格式 03. 常用选项 04. 参考示例 05. 附录 01. 命令概述 systemctl命令是系统服务管理器指令,它实际上将 s ...
Linux上的Systemctl命令
LinuxSystemctl是一个系统管理守护进程.工具和库的集合,用于取代System V.service和chkconfig命令,初始进程主要负责控制systemd系统和服务管理器.通过Syste ...
Fedora的systemctl命令详解 Fedora配置IP地址/DNS/Networking
1.原来的 service 命令与 systemctl 命令对比 demaon 命令 vs systemctl 命令 # 此处是命令对比分别对比 service命令和 systemctl 在启动. ...
Fedora中systemctl命令的使用
Fedora使用systemd服务来代替daemon,原来管理系统启动和管理系统服务的相关命令全部由systemctl命令来代替. 1.原来的 service 命令与 systemctl 命令对比 d ...
systemctl命令
systemctl命令 Systemd是一个命令组,涉及到系统管理的方方面面,而systemctl是Systemd的主命令,用于管理系统. 描述在历史上Linux的启动一直采用init进程,这种方法 ...
Linux服务器，服务管理--systemctl命令详解，设置开机自启动
Linux服务器,服务管理--systemctl命令详解,设置开机自启动 syetemclt就是service和chkconfig这两个命令的整合,在CentOS 7就开始被使用了. 摘要: syst ...
systemctl命令完全指南
Systemctl是一个systemd工具,主要负责控制systemd系统和服务管理器. Systemd是一个系统管理守护进程.工具和库的集合,用于取代System V初始进程.Systemd的功能是 ...

RHCE7 -- systemctl命令

RHCE7 -- systemctl命令相关推荐

最新文章

热门文章