bash

搜尋.bash_history下過的command

Ctrl + R

查版本

uname -a
lsb_release -a

找DNS IP

$ scutil --dns
DNS configuration

resolver #1
  nameserver[0] : 192.168.43.1
  if_index : 5 (en1)
  flags    : Request A records
  reach    : Reachable,Directly Reachable Address

讀取java位置

[ec2-user@ip-172-31-22-146 opt]$ readlink -f $(which java)
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.45-30.b13.el7_1.x86_64/jre/bin/java
/*redhat版本*/
[ec2-user@ip-172-31-22-146 ~]$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.1 (Maipo)

查詢檔案類型

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2

# file /bin/grep
/bin/grep: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=0x2695c3bf69db3cd5a6ea3f71ce1d0658e53ba354, stripped

設定redirect 80 到 8080 (-A)

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iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
/* 移除設定 (-D)*?
iptables -t nat -D PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080

CentOS 7 open port 8080 on firewall

1.ensure firewalld is active.

# systemctl status firewalld.service
firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled)
   Active: active (running) since 三 2015-11-25 09:11:43 CST; 5h 4min ago
 Main PID: 654 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─654 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid

11月 25 09:11:42 f6s systemd[1]: Starting firewalld - dynamic firewall daemon...
11月 25 09:11:43 f6s systemd[1]: Started firewalld - dynamic firewall daemon...

2.pre-check firewall rule.

[root@f6s sysconfig]# firewall-cmd --zone=public --list-all
public (default, active)
  interfaces: ens32
  sources:
  services: dhcpv6-client ssh
  ports:
  masquerade: no
  forward-ports:
  icmp-blocks:
  rich rules:

3.add rule.

1 2	[root@f6s sysconfig]# firewall-cmd --zone=public --add-port=8080/tcp --permanent success

4.rule not applied

[root@f6s sysconfig]# firewall-cmd --zone=public --list-all
public (default, active)
  interfaces: ens32
  sources:
  services: dhcpv6-client ssh
  ports:
  masquerade: no
  forward-ports:
  icmp-blocks:
  rich rules:

5.reload firewalld

1 2	[root@f6s sysconfig]# firewall-cmd --reload success

6.rule applied

[root@f6s sysconfig]# firewall-cmd --zone=public --list-all
public (default, active)
  interfaces: ens32
  sources:
  services: dhcpv6-client ssh
  ports: 8080/tcp
  masquerade: no
  forward-ports:
  icmp-blocks:
  rich rules:

Remove it as needed:

[root@f6s sysconfig]# firewall-cmd --zone=public --remove-port=8080/tcp --permanent
success
[root@f6s sysconfig]# firewall-cmd --reload
success
[root@f6s sysconfig]# firewall-cmd --zone=public --list-all
public (default, active)
  interfaces: ens32
  sources:
  services: dhcpv6-client ssh
  ports:
  masquerade: no
  forward-ports:
  icmp-blocks:
  rich rules:

reference

CentOS 7 / RHEL 7 – Open ports

PowerShell

Start-Process hexo s or start hexo s

Hexo

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