Centos 6.X 与Centos 7.X一些区别整理

作者:袖梨 2022-06-30

man:

centos 6.x

[root@Lnmp ~]# whatis man
man: nothing appropriate
[root@Lnmp ~]# makewhatis
[root@Lnmp ~]# man -f man
man                  (1)  - format and display the on-line manual pages
man.config [man]     (5)  - configuration data for man
man [manpath]        (1)  - format and display the on-line manual pages
centos 7.x

[root@localhost ~]# man -f man
man: nothing appropriate.
[root@localhost ~]# makewhatis
-bash: makewhatis: command not found
[root@localhost ~]# mandb
[root@localhost ~]# man -f man
man (1)              - an interface to the on-line reference manuals

服务启动:

centos6.x:

[root@Shell byrd]# /etc/init.d/sshd status    #查询sshd服务状态
openssh-daemon (pid  1183) is running...
[root@Shell byrd]# /etc/init.d/sshd restart    #重新启动sshd服务
Stopping sshd:                                             [  OK  ]
Starting sshd:                                             [  OK  ]
[root@Shell byrd]# service sshd restart    #重新启动sshd服务
[root@Shell byrd]# chkconfig --list|grep 3:on    #启动服务

centos7.x:

[root@hz ~]# systemctl status sshd.service    #查询sshd服务状态
sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled)
   Active: active (running) since Tue 2016-01-12 16:04:22 CST; 5min ago
  Process: 2018 ExecStartPre=/usr/sbin/sshd-keygen (code=exited, status=0/SUCCESS)
 Main PID: 2019 (sshd)
   CGroup: /system.slice/sshd.service
           └─2019 /usr/sbin/sshd -D
[root@hz ~]# systemctl restart sshd.service    #重新启动sshd服务
[root@hz ~]# systemctl list-unit-files|grep enabled    #查询所有启动服务

防火墙

centos6.x(默认是iptables):

[root@Shell byrd]# iptables -t filter -A INPUT -p tcp --dport 22 -j ACCEPT    #允许22端口,默认sshd服务


centos7.x(默认是firewalld):

[root@hz ~]# firewall-cmd --permanent --zone=public --add-port=22/tcp    #允许22端口,默认sshd服务
未完待续!!!

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