Linux(CentOS/Ubuntu)常用命令和路径

通用

当前文件夹下生成指定体积的文件

dd if=/dev/zero of=test.bin bs=1M count=10

1	dd if=/dev/zero of=test.bin bs=1M count=10

Ubuntu

ssh配置

# /etc/ssh/sshd_config
# service ssh restart

1 2	# /etc/ssh/sshd_config # service ssh restart

修改主机名称

# hostname 新主机名 //临时修改,重登生效,重启失效.

1	# hostname 新主机名 //临时修改,重登生效,重启失效.

CentOS

查看CentOS版本:rpm -q centos-release

# rpm -q centos-release
centos-release-6-8.el6.centos.12.3.x86_64

1 2	# rpm -q centos-release centos-release-6-8.el6.centos.12.3.x86_64

查看发行版本:cat /etc/redhat-release

[root@centos6 ~]# cat /etc/redhat-release
CentOS release 6.8 (Final)

1 2	[root@centos6 ~]# cat /etc/redhat-release CentOS release 6.8 (Final)

查看内核:uname -r

[root@centos6 ~]# uname -r
2.6.32-642.6.1.el6.x86_64

1 2	[root@centos6 ~]# uname -r 2.6.32-642.6.1.el6.x86_64

查看内核:uname -a

[root@centos6 ~]# uname -a
Linux centos6 2.6.32-642.6.1.el6.x86_64 #1 SMP Wed Oct 5 00:36:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

1 2	[root@centos6 ~]# uname -a Linux centos6 2.6.32-642.6.1.el6.x86_64 #1 SMP Wed Oct 5 00:36:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

CentOS6.8 防火墙命令:

查询防火墙:[root@localhost ~]# service  iptables status
停止防火墙:[root@localhost ~]# service  iptables stop 
启动防火墙:[root@localhost ~]# service  iptables start
重启防火墙:[root@localhost ~]# service  iptables restart
永久关闭墙:[root@localhost ~]# chkconfig  iptables off
永久启用墙:[root@localhost ~]# chkconfig  iptables on (永久关闭后启用)

查询防火墙:[root@localhost ~]# service iptables status

停止防火墙:[root@localhost ~]# service iptables stop

启动防火墙:[root@localhost ~]# service iptables start

重启防火墙:[root@localhost ~]# service iptables restart

永久关闭墙:[root@localhost ~]# chkconfig iptables off

永久启用墙:[root@localhost ~]# chkconfig iptables on (永久关闭后启用)