Linux系统服务管理

服务命令比较

操作	Linux 6	Linux7
服务开机自动启动	chkconfig --level 35 iptables on	systemctl enable firewalld.service
服务器开机不自动启动	chkconfig --level 35 iptables off	systemctl disable firewalld.service
加入自定义服务	chkconfig --add aaa	systemctl load aaa.service
删除服务	chkconfig --del aaa	停止服务，删除相应的配置文件
显示所有已经启动的服务	chkconfig -- list	systemctl list-unis --type=service
启动服务	service iptables start	systemctl start firewalld.service
停止服务	service iptables stop	systemctl stop firewalld.service
服务状态	service iptables status	systemctl status firewalld.service
重启服务	service iptables restart	systemctl restart firewalld.service

Linux 6

[root@mysql57 ~]# service iptables status
iptables: Firewall is not running.[root@mysql57 ~]# service iptables start
iptables: Applying firewall rules:                         [  OK  ]
[root@mysql57 ~]# service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination         
1    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED 
2    ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
3    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
4    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:22 
5    REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination         
1    REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination         
[root@mysql57 ~]# service iptables stop
iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
iptables: Flushing firewall rules:                         [  OK  ]
iptables: Unloading modules:                               [  OK  ]
[root@mysql57 ~]# service iptables status
iptables: Firewall is not running.[root@mysql57 ~]# chkconfig --list | more
NetworkManager     0:off    1:off    2:off    3:off    4:off    5:off    6:off
abrt-ccpp          0:off    1:off    2:off    3:on    4:off    5:on    6:off
abrtd              0:off    1:off    2:off    3:on    4:off    5:on    6:off
acpid              0:off    1:off    2:on    3:on    4:on    5:on    6:off
atd                0:off    1:off    2:off    3:on    4:on    5:on    6:off
auditd             0:off    1:off    2:on    3:on    4:on    5:on    6:off
autofs             0:off    1:off    2:off    3:on    4:on    5:on    6:off
blk-availability    0:off    1:on    2:on    3:on    4:on    5:on    6:off
bluetooth          0:off    1:off    2:off    3:on    4:on    5:on    6:off
certmonger         0:off    1:off    2:off    3:on    4:on    5:on    6:off
cpuspeed           0:off    1:on    2:on    3:on    4:on    5:on    6:off
crond              0:off    1:off    2:on    3:on    4:on    5:on    6:off
cups               0:off    1:off    2:on    3:on    4:on    5:on    6:off
dnsmasq            0:off    1:off    2:off    3:off    4:off    5:off    6:off
firstboot          0:off    1:off    2:off    3:off    4:off    5:off    6:off
haldaemon          0:off    1:off    2:off    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:off    4:off    5:off    6:off
ip6tables          0:off    1:off    2:on    3:on    4:on    5:on    6:off
iptables           0:off    1:off    2:off    3:off    4:off    5:off    6:off
irqbalance         0:off    1:off    2:off    3:on    4:on    5:on    6:off
kdump              0:off    1:off    2:off    3:off    4:off    5:off    6:off
lvm2-monitor       0:off    1:on    2:on    3:on    4:on    5:on    6:off
mdmonitor          0:off    1:off    2:on    3:on    4:on    5:on    6:off
messagebus         0:off    1:off    2:on    3:on    4:on    5:on    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:on    4:on    5:on    6:off
network            0:off    1:off    2:on    3:on    4:on    5:on    6:off
nfs                0:off    1:off    2:off    3:off    4:off    5:off    6:off
nfslock            0:off    1:off    2:off    3:on    4:on    5:on    6:off
ntpd               0:off    1:off    2:off    3:off    4:off    5:off    6:off
ntpdate            0:off    1:off    2:off    3:off    4:off    5:off    6:off
oddjobd            0:off    1:off    2:off    3:off    4:off    5:off    6:off
portreserve        0:off    1:off    2:on    3:on    4:on    5:on    6:off
postfix            0:off    1:off    2:on    3:on    4:on    5:on    6:off
psacct             0:off    1:off    2:off    3:off    4:off    5:off    6:off
quota_nld          0:off    1:off    2:off    3:off    4:off    5:off    6:off35启动级别关闭自启动
[root@mysql57 ~]# chkconfig --level 35 iptables off[root@mysql57 ~]# ls /etc/init.d/
abrt-ccpp         cups              irqbalance        nfslock           rngd              spice-vdagentd
abrtd             dnsmasq           kdump             ntpd              rpcbind           sshd
abrt-oops         firstboot         killall           ntpdate           rpcgssd           sssd
acpid             functions         lvm2-lvmetad      oddjobd           rpcidmapd         sysstat
atd               haldaemon         lvm2-monitor      ohasd             rpcsvcgssd        udev-post
auditd            halt              mdmonitor         portreserve       rsyslog           wdaemon
autofs            htcacheclean      messagebus        postfix           sandbox           winbind
blk-availability  httpd             netconsole        psacct            saslauthd         wpa_supplicant
bluetooth         init.ohasd        netfs             quota_nld         single            ypbind
certmonger        init.tfa          network           rdisc             smartd            
cpuspeed          ip6tables         NetworkManager    restorecond       snmpd             
crond             iptables          nfs               rhnsd             snmptrapd         

Linux 7

[root@mysql57 ~]# cd /etc/systemd/system/
basic.target.wants/
bluetooth.target.wants/
default.target.wants/
dev-virtio\x2dports-org.qemu.guest_agent.0.device.wants/
getty.target.wants/
graphical.target.wants/
local-fs.target.wants/
multi-user.target.wants/
network-online.target.wants/
printer.target.wants/
remote-fs.target.wants/
sockets.target.wants/
sysinit.target.wants/
systemd-remount-fs.service.wants/
system-update.target.wants/
timers.target.wants/
vmtoolsd.service.requires/
[root@mysql57 ~]# cd /etc/systemd/system/
[root@mysql57 system]# ls
basic.target.wants
bluetooth.target.wants
dbus-org.bluez.service
dbus-org.fedoraproject.FirewallD1.service
dbus-org.freedesktop.Avahi.service
dbus-org.freedesktop.ModemManager1.service
dbus-org.freedesktop.nm-dispatcher.service
default.target
default.target.wants
dev-virtio\x2dports-org.qemu.guest_agent.0.device.wants
display-manager.service
getty.target.wants
graphical.target.wants
local-fs.target.wants
multi-user.target.wants
network-online.target.wants
printer.target.wants
remote-fs.target.wants
sockets.target.wants
sysinit.target.wants
systemd-remount-fs.service.wants
system-update.target.wants
timers.target.wants
vmtoolsd.service.requires[root@mysql57 system]# cd multi-user.target.wants/
[root@mysql57 multi-user.target.wants]# ls
abrt-ccpp.service     initial-setup-reconfiguration.service  remote-fs.target
abrtd.service         irqbalance.service                     rhel-configure.service
abrt-oops.service     ksm.service                            rngd.service
abrt-vmcore.service   ksmtuned.service                       rpcbind.service
abrt-xorg.service     libstoragemgmt.service                 rsyslog.service
atd.service           libvirtd.service                       smartd.service
auditd.service        mcelog.service                         sshd.service
avahi-daemon.service  mdmonitor.service                      sysstat.service
brandbot.path         ModemManager.service                   tuned.service
crond.service         NetworkManager.service                 vdo.service
cups.path             nfs-client.target                      vmtoolsd.service
cups.service          oracleasm.service
firewalld.service     postfix.service[root@mysql57 multi-user.target.wants]# cd ..
[root@mysql57 system]# find ./ -name fire*
./multi-user.target.wants/firewalld.service
[root@mysql57 system]# cd multi-user.target.wants/[root@mysql57 multi-user.target.wants]# cd /usr/lib/systemd/
[root@mysql57 systemd]# ls
catalog                 systemd-coredump           systemd-shutdown
import-pubring.gpg      systemd-cryptsetup         systemd-shutdownd
ntp-units.d             systemd-fsck               systemd-sleep
ol-consolebaud          systemd-hibernate-resume   systemd-socket-proxyd
rhel-autorelabel        systemd-hostnamed          systemd-sysctl
rhel-configure          systemd-importd            systemd-sysv-install
rhel-dmesg              systemd-initctl            systemd-timedated
rhel-dmraid-activation  systemd-journald           systemd-udevd
rhel-domainname         systemd-localed            systemd-update-done
rhel-import-state       systemd-logind             systemd-update-utmp
rhel-loadmodules        systemd-machined           systemd-user-sessions
rhel-readonly           systemd-machine-id-commit  systemd-vconsole-setup
scripts                 systemd-modules-load       system-generators
system                  systemd-pstore             system-preset
systemd                 systemd-pull               system-shutdown
systemd-ac-power        systemd-quotacheck         system-sleep
systemd-activate        systemd-random-seed        user
systemd-backlight       systemd-readahead          user-generators
systemd-binfmt          systemd-remount-fs         user-preset
systemd-bootchart       systemd-reply-password
systemd-cgroups-agent   systemd-rfkill[root@mysql57 systemd]# systemctl status firewalld.service 
实际加载的/usr/lib/systemd/system/firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)Active: active (running) since Tue 2022-08-23 13:05:37 CST; 12min agoDocs: man:firewalld(1)Main PID: 1026 (firewalld)Tasks: 2CGroup: /system.slice/firewalld.service└─1026 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopidAug 23 13:05:36 mysql57.example.com systemd[1]: Starting firewalld - dynamic firewal.....
Aug 23 13:05:37 mysql57.example.com systemd[1]: Started firewalld - dynamic firewall...n.
Aug 23 13:05:37 mysql57.example.com firewalld[1026]: WARNING: AllowZoneDrifting is en....
Hint: Some lines were ellipsized, use -l to show in full.[root@mysql57 system]# ls | grep firewalld
firewalld.service
[root@mysql57 system]# pwd
/usr/lib/systemd/system关闭防火墙
[root@mysql57 system]# systemctl stop firewalld.service disable
[root@mysql57 system]# systemctl disable firewalld.service 
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.启动防护墙，开机不启动因为是disabled
[root@mysql57 system]# systemctl start firewalld.service 
[root@mysql57 system]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)Active: active (running) since Tue 2022-08-23 15:14:24 CST; 2s agoDocs: man:firewalld(1)Main PID: 4701 (firewalld)Tasks: 4CGroup: /system.slice/firewalld.service├─4701 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid├─4729 /usr/sbin/modprobe nf_conntrack├─4730 sh -c /usr/sbin/modprobe --ignore-install nf_conntrack  && /usr/sb...└─4731 /usr/sbin/modprobe --ignore-install nf_conntrackAug 23 15:14:19 mysql57.example.com systemd[1]: Starting firewalld - dynamic firewal.....
Aug 23 15:14:24 mysql57.example.com systemd[1]: Started firewalld - dynamic firewall...n.
Aug 23 15:14:25 mysql57.example.com firewalld[4701]: WARNING: AllowZoneDrifting is en....
Hint: Some lines were ellipsized, use -l to show in full.