crashmonitor(crashmonitorservice)居然可以这样

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2023-07-09
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Mar 06 12:34:09 magi-VirtualBox apachectl[1089]: AH00558: apache2: Coul

编译自： https://www.2daygeek.com/how-to-check-all-running-services-in-linux/ 作者： Magesh Maruthamuthu译者： jessie-pang

有许多方法和工具可以查看 Linux 中所有正在运行的服务大多数管理员会在 System V（SysV）初始化系统中使用 service service-name status 或 /etc/init.d/service-name status，而在 systemd 初始化系统中使用 systemctl status service-name。

以上命令可以清楚地显示该服务是否在服务器上运行，这也是每个 Linux 管理员都该知道的非常简单和基础的命令如果你对系统环境并不熟悉，也不清楚系统在运行哪些服务，你会如何检查？是的，我们的确有必要这样检查一下。

这将有助于我们了解系统上运行了什么服务，以及哪些是必要的、哪些需要被禁用init（初始化(initialization)的简称）是在系统启动期间运行的第一个进程init 是一个守护进程，它将持续运行直至关机。

大多数 Linux 发行版都使用如下的初始化系统之一：System V 是更老的初始化系统Upstart 是一个基于事件的传统的初始化系统的替代品systemd 是新的初始化系统，它已经被大多数最新的 Linux 发行版所采用

什么是 System V（SysV）SysV（意即 System V）初始化系统是早期传统的初始化系统和系统管理器由于 sysVinit 系统上一些长期悬而未决的问题，大多数最新的发行版都适用于 systemd 系统。

什么是 Upstart 初始化系统Upstart 是一个基于事件的 /sbin/init 的替代品，它控制在启动时的任务和服务的开始，在关机时停止它们，并在系统运行时监控它们它最初是为 Ubuntu 发行版开发的，但其是以适合所有 Linux 发行版的开发为目标的，以替换过时的 System-V 初始化系统。

什么是 systemdsystemd 是一个新的初始化系统以及系统管理器，它已成为大多数 Linux 发行版中非常流行且广泛适应的新的标准初始化系统systemctl 是一个 systemd 管理工具，它可以帮助我们管理 systemd 系统。

方法一：如何在 System V（SysV）系统中查看运行的服务以下命令可以帮助我们列出 System V（SysV）系统中所有正在运行的服务如果服务很多，我建议使用文件查看命令，如 less、more 等，以便得到清晰的结果。

# service --status-all 或 # service --status-all | more 或 # service --status-all | less abrt-ccpp hook is installed

abrtd (pid 2131) is running... abrt-dump-oops is stopped acpid (pid 1958) is running... atd (pid 2164) is running...

auditd (pid 1731) is running... Frequency scaling enabled using ondemand governor crond (pid 2153) is running...

hald (pid 1967) is running... htcacheclean is stopped httpd is stopped Table: filter Chain INPUT (policy ACCEPT)

num target prot opt source destination 1 ACCEPT all ::/0 ::/0 state RELATED,ESTABLISHED 2 ACCEPT icmpv6 ::/0 ::/0

3 ACCEPT all ::/0 ::/0 4 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:80 5 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:21

6 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:22 7 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:25 8 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:2082

9 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:2086 10 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:2083 11 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:2087

12 ACCEPT tcp ::/0 ::/0 state NEW tcp dpt:10000 13 REJECT all ::/0 ::/0 reject-with icmp6-adm-prohibited

Chain FORWARD (policy ACCEPT) num target prot opt source destination 1 REJECT all ::/0 ::/0 reject-with icmp6-adm-prohibited

Chain OUTPUT (policy ACCEPT) num target prot opt source destination iptables: Firewall is not running.

irqbalance (pid 1826) is running... Kdump is operational lvmetad is stopped mdmonitor is stopped messagebus (pid 1929) is running...

SUCCESS! MySQL running (24376) rndc: neither /etc/rndc.conf nor /etc/rndc.key was found named is stopped

netconsole module not loaded Usage: startup.sh { start | stop } Configured devices: lo eth0 eth1 Currently active devices:

lo eth0 ntpd is stopped portreserve (pid 1749) is running... master (pid 2107) is running... Process accounting is disabled.

quota_nld is stopped rdisc is stopped rngd is stopped rpcbind (pid 1840) is running... rsyslogd (pid 1756) is running...

sandbox is stopped saslauthd is stopped smartd is stopped openssh-daemon (pid 9859) is running... svnserve is stopped

vsftpd (pid 4008) is running... xinetd (pid 2031) is running... zabbix_agentd (pid 2150 2149 2148 2147 2146 2140) is running...

执行以下命令，可以只查看正在运行的服务：# service --status-all | grep running crond (pid 535) is running... httpd (pid 627) is running...

mysqld (pid 911) is running... rndc: neither /etc/rndc.conf nor /etc/rndc.key was found rsyslogd (pid 449) is running...

saslauthd (pid 492) is running... sendmail (pid 509) is running... sm-client (pid 519) is running...

openssh-daemon (pid 478) is running... xinetd (pid 485) is running... 运行以下命令以查看指定服务的状态：# service --status-all | grep httpd

httpd (pid 627) is running... 或者，使用以下命令也可以查看指定服务的状态：# service httpd status httpd (pid 627) is running...

使用以下命令查看系统启动时哪些服务会被启用：# chkconfig --list crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off htcacheclean 0:off 1:off 2:off 3:off 4:off 5:off 6:off

httpd 0:off 1:off 2:off 3:on 4:off 5:off 6:off ip6tables 0:off 1:off 2:on 3:off 4:on 5:on 6:off iptables 0:off 1:off 2:on 3:on 4:on 5:on 6:off

modules_dep 0:off 1:off 2:on 3:on 4:on 5:on 6:off mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off named 0:off 1:off 2:off 3:off 4:off 5:off 6:off

netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off netfs 0:off 1:off 2:off 3:off 4:on 5:on 6:off network 0:off 1:off 2:on 3:on 4:on 5:on 6:off

nmb 0:off 1:off 2:off 3:off 4:off 5:off 6:off nscd 0:off 1:off 2:off 3:off 4:off 5:off 6:off portreserve 0:off 1:off 2:on 3:off 4:on 5:on 6:off

quota_nld 0:off 1:off 2:off 3:off 4:off 5:off 6:off rdisc 0:off 1:off 2:off 3:off 4:off 5:off 6:off restorecond 0:off 1:off 2:off 3:off 4:off 5:off 6:off

rpcbind 0:off 1:off 2:on 3:off 4:on 5:on 6:off rsyslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off saslauthd 0:off 1:off 2:off 3:on 4:off 5:off 6:off

sendmail 0:off 1:off 2:on 3:on 4:on 5:on 6:off smb 0:off 1:off 2:off 3:off 4:off 5:off 6:off snmpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off

snmptrapd 0:off 1:off 2:off 3:off 4:off 5:off 6:off sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off udev-post 0:off 1:on 2:on 3:off 4:on 5:on 6:off

winbind 0:off 1:off 2:off 3:off 4:off 5:off 6:off xinetd 0:off 1:off 2:off 3:on 4:on 5:on 6:off xinetd based services:

chargen-dgram: off chargen-stream: off daytime-dgram: off daytime-stream: off discard-dgram: off

discard-stream: off echo-dgram: off echo-stream: off finger: off ntalk: off rsync: off talk: off

tcpmux-server: off time-dgram: off time-stream: off 方法二：如何在 System V（SysV）系统中查看运行的服务另外一种在 Linux 系统上列出运行的服务的方法是使用 initctl 命令：

# initctl list rc stop/waiting tty (/dev/tty3) start/running, process 1740 tty (/dev/tty2) start/running, process 1738

tty (/dev/tty1) start/running, process 1736 tty (/dev/tty6) start/running, process 1746 tty (/dev/tty5) start/running, process 1744

tty (/dev/tty4) start/running, process 1742 plymouth-shutdown stop/waiting control-alt-delete stop/waiting

rcS-emergency stop/waiting readahead-collector stop/waiting kexec-disable stop/waiting quit-plymouth stop/waiting

rcS stop/waiting prefdm stop/waiting init-system-dbus stop/waiting ck-log-system-restart stop/waiting

readahead stop/waiting ck-log-system-start stop/waiting splash-manager stop/waiting start-ttys stop/waiting

readahead-disable-services stop/waiting ck-log-system-stop stop/waiting rcS-sulogin stop/waiting serial stop/waiting

方法三：如何在 systemd 系统中查看运行的服务以下命令帮助我们列出 systemd 系统中所有服务：# systemctl UNIT LOAD ACTIVE SUB DESCRIPTION sys-devices-virtual-block-loop0.device loaded active plugged /sys/devices/virtual/block/loop0

sys-devices-virtual-block-loop1.device loaded active plugged /sys/devices/virtual/block/loop1 sys-devices-virtual-block-loop2.device loaded active plugged /sys/devices/virtual/block/loop2

sys-devices-virtual-block-loop3.device loaded active plugged /sys/devices/virtual/block/loop3 sys-devices-virtual-block-loop4.device loaded active plugged /sys/devices/virtual/block/loop4

sys-devices-virtual-misc-rfkill.device loaded active plugged /sys/devices/virtual/misc/rfkill sys-devices-virtual-tty-ttyprintk.device loaded active plugged /sys/devices/virtual/tty/ttyprintk

sys-module-fuse.device loaded active plugged /sys/module/fuse sys-subsystem-net-devices-enp0s3.device loaded active plugged 82540EM Gigabit Ethernet Controller (PRO/1000 MT Desktop Adapter)

-.mount loaded active mounted Root Mount dev-hugepages.mount loaded active mounted Huge Pages File System

dev-mqueue.mount loaded active mounted POSIX Message Queue File System run-user-1000-gvfs.mount loaded active mounted /run/user/1000/gvfs

run-user-1000.mount loaded active mounted /run/user/1000 snap-core-3887.mount loaded active mounted Mount unit for core

snap-core-4017.mount loaded active mounted Mount unit for core snap-core-4110.mount loaded active mounted Mount unit for core

snap-gping-13.mount loaded active mounted Mount unit for gping snap-termius\x2dapp-8.mount loaded active mounted Mount unit for termius-app

sys-fs-fuse-connections.mount loaded active mounted FUSE Control File System sys-kernel-debug.mount loaded active mounted Debug File System

acpid.path loaded active running ACPI Events Check cups.path loaded active running CUPS Scheduler systemd-ask-password-plymouth.path loaded active waiting Forward Password Requests to Plymouth Directory Watch

systemd-ask-password-wall.path loaded active waiting Forward Password Requests to Wall Directory Watch

init.scope loaded active running System and Service Manager session-c2.scope loaded active running Session c2 of user magi

accounts-daemon.service loaded active running Accounts Service acpid.service loaded active running ACPI event daemon

anacron.service loaded active running Run anacron jobs apache2.service loaded active running The Apache HTTP Server

apparmor.service loaded active exited AppArmor initialization apport.service loaded active exited LSB: automatic crash report generation

aptik-battery-monitor.service loaded active running LSB: start/stop the aptik battery monitor daemon

atop.service loaded active running Atop advanced performance monitor atopacct.service loaded active running Atop process accounting daemon

avahi-daemon.service loaded active running Avahi mDNS/DNS-SD Stack colord.service loaded active running Manage, Install and Generate Color Profiles

console-setup.service loaded active exited Set console font and keymap cron.service loaded active running Regular background program processing daemon

cups-browsed.service loaded active running Make remote CUPS printers available locally cups.service loaded active running CUPS Scheduler

dbus.service loaded active running D-Bus System Message Bus postfix.service loaded active exited Postfix Mail Transport Agent

UNIT 相应的 systemd 单元名称LOAD 相应的单元是否被加载到内存中ACTIVE 该单元是否处于活动状态SUB 该单元是否处于运行状态（LCTT 译注：是较于 ACTIVE 更加详细的状态描述，不同的单元类型有不同的状态。

）DESCRIPTION 关于该单元的简短描述以下选项可根据类型列出单元：# systemctl list-units --type service UNIT LOAD ACTIVE SUB DESCRIPTION