Cisco 查看網路介面

	R1#sh ip int brief
	Interface IP-Address OK? Method Status Protocol
	Ethernet0 unassigned YES unset administratively down down
	Ethernet1 unassigned YES unset administratively down down
	FastEthernet0 unassigned YES unset administratively down down

view raw 2016043004.sh hosted with ❤ by GitHub

Cisco 設定主機名稱

	Router>en
	Router#conf t
	Enter configuration commands, one per line. End with CNTL/Z.
	Router(config)#hostname R1
	R1(config)#exit
	R1#wr

view raw 2016043003.sh hosted with ❤ by GitHub

Juniper 系統關機

	root> request system halt
	warning: The configuration has been changed but not committed
	Halt the system ? [yes,no] (no) yes
	*** FINAL System shutdown message from root@ ***
	System going down IMMEDIATELY
	Shutdown NOW!
	[pid 1556]

view raw 2016043002 hosted with ❤ by GitHub

Juniper 回復原廠設定

	root# load factory-default
	warning: activating factory configuration
	[edit]
	root# commit

view raw 2016043001 hosted with ❤ by GitHub

Windows Power Shell 取得日期 Get-Date

Windows Power Shell 取得日期 Get-Date

	PS C:\Users\Administrator> Get-Date -Format yyyMMdd
	20160429

view raw 2016042901 hosted with ❤ by GitHub

Windows Power Shell 查看 Eventlog

取得所有 Eventlog

	PS C:\> get-eventlog -list
	Max(K) Retain OverflowAction Entries Log
	------ ------ -------------- ------- ---
	20,480 0 OverwriteAsNeeded 706 Application
	20,480 0 OverwriteAsNeeded 0 HardwareEvents
	512 7 OverwriteOlder 9 Hewlett-Packard
	512 7 OverwriteOlder 0 Internet Explorer
	20,480 0 OverwriteAsNeeded 0 Key Management Service
	20,480 0 OverwriteAsNeeded 3,590 Security
	20,480 0 OverwriteAsNeeded 3,658 System
	15,360 0 OverwriteAsNeeded 91 Windows PowerShell

view raw 2016042808 hosted with ❤ by GitHub

查看前 50 筆 Log

	PS C:\> get-eventlog -newest 50 Hewlett-Packard
	Index Time EntryType Source InstanceID Message
	----- ---- --------- ------ ---------- -------
	9 三月 01 10:52 Error HPSF.exe 2000 HP Error ID: -2146233087 於 System.Windows.Ma...
	8 三月 01 10:43 Error HPSF.exe 2000 HP Error ID: -2146233087 於 System.Windows.Ma...
	7 三月 01 09:38 Error HPSF.exe 2000 HP Error ID: -2146233087 於 System.Windows.Ma...
	6 二月 26 01:16 Error HPSF.exe 2000 HP Error ID: -2146233087 於 System.Windows.Ma...
	5 二月 26 00:42 Error HPSF.exe 2000 HP Error ID: -2146233087 於 System.Windows.Ma...
	4 二月 25 05:10 Error HPSF.exe 2000 HP Error ID: -2146233087 於 System.Windows.Ma...
	3 二月 25 05:10 Error HPSF.exe 2000 HP Error ID: -2146233087 於 System.Windows.Ma...
	2 二月 25 05:10 Error HPSF.exe 2000 HP Error ID: -2146233087 於 System.Windows.Ma...
	1 二月 25 05:09 Error HPSF.exe 2000 HP Error ID: -2146233087 於 System.Windows.Ma...

view raw 2016042809 hosted with ❤ by GitHub

Linux 網路管理工具 ip

顯示 IP

	[root@rhel7 ~]# ip a s
	1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
	link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
	inet 127.0.0.1/8 scope host lo
	valid_lft forever preferred_lft forever
	inet6 ::1/128 scope host
	valid_lft forever preferred_lft forever
	2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
	link/ether 00:15:5d:22:b4:04 brd ff:ff:ff:ff:ff:ff
	inet 192.168.100.100/24 brd 192.168.100.255 scope global eth0
	valid_lft forever preferred_lft forever
	inet6 fe80::215:5dff:fe22:b404/64 scope link
	valid_lft forever preferred_lft forever

view raw 2016042806.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# ip a s dev eth0 |grep inet |awk '{ print $2}'
	192.168.100.100/24
	fe80::215:5dff:fe22:b404/64

view raw 2016042805.sh hosted with ❤ by GitHub

顯示 Gateway

	[root@rhel7 ~]# ip route
	default via 192.168.100.254 dev eth0
	192.168.100.0/24 dev eth0 proto kernel scope link src 192.168.100.100
	169.254.0.0/16 dev eth0 scope link metric 1002

view raw 2016042807.sh hosted with ❤ by GitHub

Linux 防火牆管理工具 firewalld

列出目前狀態

	[root@rhel7 ~]# firewall-cmd --list-all
	public (default, active)
	interfaces: eth0
	sources:
	services: dhcpv6-client ssh
	ports:
	masquerade: no
	forward-ports:
	icmp-blocks:
	rich rules:

view raw 2016042207.sh hosted with ❤ by GitHub

新增目標「暫時」

	[root@rhel7 ~]# firewall-cmd --add-port=80/tcp
	success
	[root@rhel7 ~]# firewall-cmd --add-port=443/tcp
	success

view raw 2016042208.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# firewall-cmd --list-all |grep ports
	ports: 443/tcp 80/tcp
	forward-ports:

view raw 2016042209.sh hosted with ❤ by GitHub

新增目標「永久」

	[root@rhel7 ~]# firewall-cmd --permanent --add-port=80/tcp
	success
	[root@rhel7 ~]# firewall-cmd --permanent --add-port=443/tcp
	success

view raw 2016042210.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# firewall-cmd --permanent --list-all
	public (default)
	interfaces:
	sources:
	services: dhcpv6-client ssh
	ports: 443/tcp 80/tcp
	masquerade: no
	forward-ports:
	icmp-blocks:
	rich rules:

view raw 2016042211.sh hosted with ❤ by GitHub

Linux 服務管理工具 systemctl

服務的停止與啟動

	[root@rhel7 ~]# systemctl start httpd
	[root@rhel7 ~]# systemctl stop httpd
	[root@rhel7 ~]# systemctl restart httpd

view raw 2016042802.sh hosted with ❤ by GitHub

顯示所有服務

	[root@rhel7 ~]# systemctl list-unit-files --type service
	UNIT FILE STATE
	auditd.service enabled
	autovt@.service disabled
	avahi-daemon.service enabled
	brandbot.service static
	console-getty.service disabled
	console-shell.service disabled
	cpupower.service disabled
	crond.service enabled
	dbus-org.fedoraproject.FirewallD1.service enabled

view raw 2016042803.sh hosted with ❤ by GitHub

啟動執行與停止服務

	[root@rhel7 ~]# systemctl enable httpd
	ln -s '/usr/lib/systemd/system/httpd.service' '/etc/systemd/system/multi-user.target.wants/httpd.service'
	[root@rhel7 ~]# systemctl disable httpd
	rm '/etc/systemd/system/multi-user.target.wants/httpd.service'

view raw 2016042804 hosted with ❤ by GitHub

Linux 縱向擷取工具 awk

	[root@rhel7 ~]# tail /etc/passwd |awk -F: '{ print $1 }'
	nobody
	dbus
	polkitd
	avahi
	avahi-autoipd
	postfix
	sshd
	admin
	apache
	mysql

view raw 2016042801.sh hosted with ❤ by GitHub

Linux 橫向擷取工具 grep

[root@rhel7 ~]# cat [file] |grep 'option1\|option2\|option3'

view raw 20160422B01.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# systemctl list-unit-files --type service |grep 'firewall\|postfix\|httpd'
	firewalld.service enabled
	httpd.service disabled
	postfix.service enabled
	#查詢多筆資訊

view raw 20160422B02.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# egrep "postfix|mysql" /etc/passwd
	postfix:x:89:89::/var/spool/postfix:/sbin/nologin
	mysql:x:998:997:MySQL server:/var/lib/mysql:/sbin/nologin
	#使用[egrep]查詢多筆資訊

view raw 20160422B03.sh hosted with ❤ by GitHub

Linux 文字改寫的好幫手 sed

文字改寫的好幫手

文字替換

	[root@rhel7 ~]# echo abcd |sed s/a/z/
	zbcd
	#文字替換
	[root@rhel7 ~]# echo "abcd" |sed "s/a/z/"
	zbcd
	#引號

view raw 20160422A01.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# echo old old | sed s/old/new/g
	new new
	#文字替換
	[root@rhel7 ~]# echo "abcd" |sed "s/a/z/"
	zbcd

view raw 20160422A02.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# echo "this is bad" | sed 's/bad/good/w out.txt'
	this is good
	#替換文件內文字
	[root@rhel7 ~]# cat out.txt
	this is good
	#查看結果

view raw 20160422A03.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# echo "今天心情很差" | sed s/差/好/g
	今天心情很好
	#中文範例

view raw 20160422A04.sh hosted with ❤ by GitHub

Linux RHEL7 網路連線查看工具 ss

簡介：自RHEL7發行開始，就已移除了舊有的「netstat」而使用「ss」來取代。

參數介紹

	[root@rhel7 ~]# man ss
	-a, --all
	-l, --listening
	-n, --numeric
	ss -t -a
	Display all TCP sockets.
	Display all UDP sockets.

view raw 2016042202.sh hosted with ❤ by GitHub

基本服務查詢

	[root@rhel7 ~]# ss -lt
	State Recv-Q Send-Q Local Address:Port Peer Address:Port
	LISTEN 0 100 127.0.0.1:smtp *:*
	LISTEN 0 50 *:mysql *:*
	LISTEN 0 128 *:ndmp *:*
	LISTEN 0 128 *:ssh *:*
	LISTEN 0 100 ::1:smtp :::*
	LISTEN 0 128 :::http :::*
	LISTEN 0 128 :::ssh

view raw 2016042001.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# ss -ltn
	State Recv-Q Send-Q Local Address:Port Peer Address:Port
	LISTEN 0 100 127.0.0.1:25 *:*
	LISTEN 0 50 *:3306 *:*
	LISTEN 0 128 *:10000 *:*
	LISTEN 0 128 *:22 *:*
	LISTEN 0 100 ::1:25 :::*
	LISTEN 0 128 :::80 :::*
	LISTEN 0 128 :::22 :::*

view raw 2016042201.sh hosted with ❤ by GitHub