//to check current configured devices and current running devices
[root@laptop ~]# service --status-all
/etc/sysconfig/network: line 2: HOSTNAME: command not found
netconsole module not loaded
/etc/sysconfig/network: line 2: HOSTNAME: command not found
Configured devices:
lo Boobi_Khan Redmi
Currently active devices:
lo enp4s0f2 wlp0s26u1u2
//to view currently running services with associate ports
[root@laptop ~]# netstat -antlup
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 892/cupsd
tcp 0 0 192.168.43.192:51732 216.58.197.78:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:51700 216.58.197.78:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:52040 216.58.199.131:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:49322 54.69.152.122:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:35340 172.217.26.201:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:49324 54.69.152.122:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:41842 172.217.160.132:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:49130 172.217.166.99:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:51720 216.58.197.78:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:54288 23.46.187.170:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:35738 216.58.196.163:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:49898 172.217.163.194:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:41176 172.217.163.35:80 TIME_WAIT -
tcp 0 0 192.168.43.192:41174 172.217.163.35:80 TIME_WAIT -
tcp 0 0 192.168.43.192:49912 172.217.163.194:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:60672 216.58.196.170:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:44098 216.58.197.65:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:35308 216.58.200.142:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:57026 216.58.197.52:443 ESTABLISHED 2224/firefox
tcp6 0 0 ::1:631 :::* LISTEN 892/cupsd
udp 0 0 127.0.0.1:323 0.0.0.0:* 886/chronyd
udp 0 0 0.0.0.0:40847 0.0.0.0:* 776/avahi-daemon: r
udp 0 0 0.0.0.0:68 0.0.0.0:* 1030/dhclient
udp 0 0 0.0.0.0:5353 0.0.0.0:* 776/avahi-daemon: r
udp6 0 0 ::1:323 :::* 886/chronyd
//to know centos 6 enabled services
[root@laptop ~]# chkconfig --list
Note: This output shows SysV services only and does not include native
systemd services. SysV configuration data might be overridden by native
systemd configuration.
If you want to list systemd services use 'systemctl list-unit-files'.
To see services enabled on particular target use
'systemctl list-dependencies [target]'.
livesys 0:off 1:off 2:off 3:on 4:on 5:on 6:off
livesys-late 0:off 1:off 2:off 3:on 4:on 5:on 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
network 0:off 1:off 2:off 3:off 4:off 5:off 6:off
//centos7
#systemctl enable .service
#systemctl disable .service
[root@laptop ~]# systemctl list-units
//it will show all the systemctl units and services
[root@laptop ~]# systemctl
[root@laptop ~]# systemctl | grep ssh
[root@laptop ~]# systemctl list-unit-files
proc-sys-fs-binfmt_misc.mount static
sys-fs-fuse-connections.mount static
sys-kernel-config.mount static
sys-kernel-debug.mount static
tmp.mount enabled
var-lib-nfs-rpc_pipefs.mount static
brandbot.path enabled
cups.path enabled
systemd-ask-password-console.path static
systemd-ask-password-plymouth.path static
systemd-ask-password-wall.path static
session-1.scope static
session-8.scope static
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
alsa-state.service static
anaconda-direct.service static
anaconda-nm-config.service static
anaconda-noshell.service static
anaconda-pre.service static
anaconda-shell@.service static
anaconda-sshd.service static
anaconda-tmux@.service static
//it will displays all the server status
[root@laptop ~]# systemd-cgtop
//it will display the running process with associate cpu allocation details
Path Tasks %CPU Memory Input/s Output/s
/ 219 39.4 1.4G - -
/system.slice/ModemManager.service 1 - - - -
/system.slice/NetworkManager.service 2 - - - -
/system.slice/abrt-oops.service 1 - - - -
/system.slice/abrt-xorg.service 1 - - - -
/system.slice/abrtd.service 1 - - - -
/system.slice/accounts-daemon.service 1 - - - -
/system.slice/alsa-state.service 1 - - - -
/system.slice/atd.service 1 - - - -
/system.slice/auditd.service 3 - - - -
/system.slice/avahi-daemon.service 2 - - - -
/system.slice/bolt.service 1 - - - -
/system.slice/chronyd.service 1 - - - -
/system.slice/colord.service 1 - - - -
/system.slice/crond.service 1 - - - -
/system.slice/cups.service 1 - - - -
/system.slice/dbus.service 1 - - - -
/system.slice/fwupd.service 1 - - - -
/system.slice/gdm.service 2 - - - -
/system.slice/gssproxy.service 1 - - - -
/system.slice/irqbalance.service 1 - - - -
/system.slice/libstoragemgmt.service 1 - - - -
/system.slice/lvm2-lvmetad.service 1 - - - -
/system.slice/packagekit.service 1 - - - -
/system.slice/polkit.service 1 - - - -
/system.slice/rngd.service 1 - - - -
/system.slice/rtkit-daemon.service 1 - - - -
/system.slice/smartd.service 1 - - - -
/system.slice/systemd-journald.service 1 - - - -
/system.slice/systemd-logind.service 1 - - - -
/system.slice/systemd-udevd.service 1 - - - -
//for check any program running in background
#ps -ef
#ps -aux
#ps -ef | grep -i sh
//it will show if any script are running in backgrond
//check any scheculed job running in background
#crontab -l
[root@laptop ~]# service --status-all
/etc/sysconfig/network: line 2: HOSTNAME: command not found
netconsole module not loaded
/etc/sysconfig/network: line 2: HOSTNAME: command not found
Configured devices:
lo Boobi_Khan Redmi
Currently active devices:
lo enp4s0f2 wlp0s26u1u2
//to view currently running services with associate ports
[root@laptop ~]# netstat -antlup
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 892/cupsd
tcp 0 0 192.168.43.192:51732 216.58.197.78:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:51700 216.58.197.78:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:52040 216.58.199.131:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:49322 54.69.152.122:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:35340 172.217.26.201:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:49324 54.69.152.122:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:41842 172.217.160.132:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:49130 172.217.166.99:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:51720 216.58.197.78:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:54288 23.46.187.170:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:35738 216.58.196.163:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:49898 172.217.163.194:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:41176 172.217.163.35:80 TIME_WAIT -
tcp 0 0 192.168.43.192:41174 172.217.163.35:80 TIME_WAIT -
tcp 0 0 192.168.43.192:49912 172.217.163.194:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:60672 216.58.196.170:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:44098 216.58.197.65:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:35308 216.58.200.142:443 ESTABLISHED 2224/firefox
tcp 0 0 192.168.43.192:57026 216.58.197.52:443 ESTABLISHED 2224/firefox
tcp6 0 0 ::1:631 :::* LISTEN 892/cupsd
udp 0 0 127.0.0.1:323 0.0.0.0:* 886/chronyd
udp 0 0 0.0.0.0:40847 0.0.0.0:* 776/avahi-daemon: r
udp 0 0 0.0.0.0:68 0.0.0.0:* 1030/dhclient
udp 0 0 0.0.0.0:5353 0.0.0.0:* 776/avahi-daemon: r
udp6 0 0 ::1:323 :::* 886/chronyd
//to know centos 6 enabled services
[root@laptop ~]# chkconfig --list
Note: This output shows SysV services only and does not include native
systemd services. SysV configuration data might be overridden by native
systemd configuration.
If you want to list systemd services use 'systemctl list-unit-files'.
To see services enabled on particular target use
'systemctl list-dependencies [target]'.
livesys 0:off 1:off 2:off 3:on 4:on 5:on 6:off
livesys-late 0:off 1:off 2:off 3:on 4:on 5:on 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
network 0:off 1:off 2:off 3:off 4:off 5:off 6:off
//centos7
#systemctl enable .service
#systemctl disable .service
[root@laptop ~]# systemctl list-units
//it will show all the systemctl units and services
[root@laptop ~]# systemctl
[root@laptop ~]# systemctl | grep ssh
[root@laptop ~]# systemctl list-unit-files
proc-sys-fs-binfmt_misc.mount static
sys-fs-fuse-connections.mount static
sys-kernel-config.mount static
sys-kernel-debug.mount static
tmp.mount enabled
var-lib-nfs-rpc_pipefs.mount static
brandbot.path enabled
cups.path enabled
systemd-ask-password-console.path static
systemd-ask-password-plymouth.path static
systemd-ask-password-wall.path static
session-1.scope static
session-8.scope static
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
alsa-state.service static
anaconda-direct.service static
anaconda-nm-config.service static
anaconda-noshell.service static
anaconda-pre.service static
anaconda-shell@.service static
anaconda-sshd.service static
anaconda-tmux@.service static
//it will displays all the server status
[root@laptop ~]# systemd-cgtop
//it will display the running process with associate cpu allocation details
Path Tasks %CPU Memory Input/s Output/s
/ 219 39.4 1.4G - -
/system.slice/ModemManager.service 1 - - - -
/system.slice/NetworkManager.service 2 - - - -
/system.slice/abrt-oops.service 1 - - - -
/system.slice/abrt-xorg.service 1 - - - -
/system.slice/abrtd.service 1 - - - -
/system.slice/accounts-daemon.service 1 - - - -
/system.slice/alsa-state.service 1 - - - -
/system.slice/atd.service 1 - - - -
/system.slice/auditd.service 3 - - - -
/system.slice/avahi-daemon.service 2 - - - -
/system.slice/bolt.service 1 - - - -
/system.slice/chronyd.service 1 - - - -
/system.slice/colord.service 1 - - - -
/system.slice/crond.service 1 - - - -
/system.slice/cups.service 1 - - - -
/system.slice/dbus.service 1 - - - -
/system.slice/fwupd.service 1 - - - -
/system.slice/gdm.service 2 - - - -
/system.slice/gssproxy.service 1 - - - -
/system.slice/irqbalance.service 1 - - - -
/system.slice/libstoragemgmt.service 1 - - - -
/system.slice/lvm2-lvmetad.service 1 - - - -
/system.slice/packagekit.service 1 - - - -
/system.slice/polkit.service 1 - - - -
/system.slice/rngd.service 1 - - - -
/system.slice/rtkit-daemon.service 1 - - - -
/system.slice/smartd.service 1 - - - -
/system.slice/systemd-journald.service 1 - - - -
/system.slice/systemd-logind.service 1 - - - -
/system.slice/systemd-udevd.service 1 - - - -
//for check any program running in background
#ps -ef
#ps -aux
#ps -ef | grep -i sh
//it will show if any script are running in backgrond
//check any scheculed job running in background
#crontab -l
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