Tec: 5月 2016

2016年5月25日星期三

Linux Bash

shell 的 PID：『 echo $$ 』
指令回傳值：『 echo $? 』
連續指令的種類：『 ; 』、『 && 』、『 || 』

shell 的 PID：『 echo $$ 』

	[root@rhel7 ~]# echo $$
	6601
	[root@rhel7 ~]# ps aux \|grep 6601
	root 6601 0.0 0.4 115484 2124 pts/0 Ss 13:03 0:00 -bash
	root 7450 0.0 0.1 112640 980 pts/0 S+ 13:32 0:00 grep --color=auto 6601

view raw 2016052610.sh hosted with ❤ by GitHub

指令回傳值：『 echo $? 』

	[root@rhel7 ~]# true
	[root@rhel7 ~]# echo $?
	0

view raw 2016052620.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# false
	[root@rhel7 ~]# echo $?
	1

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連續指令的種類：『 ; 』、『 && 』、『 || 』

	[root@rhel7 ~]# id \|\| pwd
	uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

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	[root@rhel7 ~]# id && pwd
	uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
	/root

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	[root@rhel7 ~]# id ; pwd
	uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
	/root

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	[root@rhel7 ~]# false \|\| echo "Oops, fail"
	Oops, fail
	[root@rhel7 ~]# true \|\| echo "Will not be printed"
	[root@rhel7 ~]# true && echo "Things went well"
	Things went well
	[root@rhel7 ~]# false ; echo "This will always run"
	This will always run

view raw 2016052630.sh hosted with ❤ by GitHub

連續指令『 cmd1 』失敗的結果：

	[root@rhel7 ~]# foo \|\| id
	-bash: foo: command not found
	uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
	[root@rhel7 ~]# foo && id
	-bash: foo: command not found
	[root@rhel7 ~]# foo ; id
	-bash: foo: command not found
	uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

view raw 2016052640.sh hosted with ❤ by GitHub

2016年5月23日星期一

Apache Configuration Sections

連結位置：http://httpd.apache.org/docs/current/sections.html

PHP HTML 轉換為 PHP

	<html>
	<head>
	<title>Page Title</title>
	</head>
	<body>

	<h1>This is a Heading</h1>
	<p>This is a paragraph.</p>

	</body>
	</html>

view raw 2016052403.html hosted with ❤ by GitHub

	<?php
	echo "<html>\n";
	echo "<head>\n";
	echo "<title>Page Title</title>\n";
	echo "</head>\n";
	echo "<body>\n";
	echo "\n";
	echo "<h1>This is a Heading</h1>\n";
	echo "<p>This is a paragraph.</p>\n";
	echo "\n";
	echo "</body>\n";
	echo "</html>\n";
	?>

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http://www.yellowpipe.com/yis/tools/HTML_converter/

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PHP 顯示範圍內任意數值

	<?php
	echo rand(5200,6000);
	?>

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PHP HTML 內加入 PHP

	<html>

	<head>
	<title>Information</title>
	</head>

	<body>

	<?php
	/*
	multiline
	*/

	// Single line comments
	# Another comment

	echo "<p>"Data processed</>";

	date_default_timezone_set('UTC')

	echo date('h:i:s:u a, l F jS Y e');

	?>
	</body>
	</html>

view raw 2016052401.php hosted with ❤ by GitHub

資料來源:https://www.youtube.com/watch?v=7TF00hJI78Y

2016年5月7日星期六

Linux 使用者管理

	[root@localhost /]# useradd user1 ;echo passwd \|passwd user1 --stdin
	更改使用者 user1 的密碼。
	passwd：所有驗證 token 都已成功更新。
	#新增使用者與建立密碼。

view raw 2016050802.sh hosted with ❤ by GitHub

	[root@localhost /]# useradd user2 ;echo passwd \|passwd user2 --stdin;id user2
	Changing password for user user2.
	passwd: all authentication tokens updated successfully.
	uid=504(user2) gid=504(user2) groups=504(user2)
	#查詢[uid]

view raw 2016050803.sh hosted with ❤ by GitHub

	[root@localhost /]# useradd -u 1234 user3 ;echo passwd \|passwd user3 --stdin;id user3
	Changing password for user user3.
	passwd: all authentication tokens updated successfully.
	uid=1234(user3) gid=1234(user3) groups=1234(user3)
	#建立帳戶，指定[uid]。

view raw 2016050804.sh hosted with ❤ by GitHub

	[root@localhost /]# useradd -g Manager user5
	[root@localhost /]# id user5
	uid=1236(user5) gid=1236(Manager) groups=1236(Manager)
	#建立帳戶時，指定群組。

view raw 2016050805.sh hosted with ❤ by GitHub

	[root@localhost ~]# useradd u1
	[root@localhost ~]# groupadd admins
	#建立帳戶與群組。
	[root@localhost ~]# grep u1 /etc/passwd
	u1:x:507:509::/home/u1:/bin/bash
	#查詢帳號資訊
	[root@localhost ~]# usermod -s /sbin/nologin u1
	[root@localhost ~]# grep u1 /etc/passwd
	u1:x:507:509::/home/u1:/sbin/nologin
	#將可用[bash]修改為[nologin]。
	[root@localhost ~]# usermod -g admins u1
	[root@localhost ~]# id u1
	uid=507(u1) gid=505(admins) groups=505(admins)
	#將[u1]加入[admins]群組。

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Linux 搜尋工具 find

	[root@localhost ~]# find [路徑] -user [帳號] -exec [指令] {} [目的位置] \;

	#後續需要進行動作需要搭配 -exec、{}
	# {}為find找尋出來的項目
	#結尾必須加上 \;

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	[root@localhost ~]# find /home -user s1 \|sort
	/home/s1
	/home/s1/.bash_history
	/home/s1/.bash_logout
	/home/s1/.bash_profile
	/home/s1/.bashrc

	#搜尋 /home 底下 owner 為 s1 的資料
	#並且搜尋出來的資料，需要按照檔名進行排列

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	[root@rhel7 ~]# find /TEMP/ -name "*.txt"
	/TEMP/123.txt
	/TEMP/456.txt
	#找所有 txt 檔案

view raw 2016050803.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# find /TEMP/ -name 123 -type d
	/TEMP/123
	#找 123 目錄

view raw 2016050804.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# find /TEMP/ -type d
	/TEMP/
	/TEMP/123
	/TEMP/234
	/TEMP/345
	#找所有目錄

view raw 2016050805.sh hosted with ❤ by GitHub

	[root@localhost ~]# find /home -user andy -exec ls -al {} \;
	total 20
	drwx------. 2 andy andy 4096 Jul 17 03:45 .
	drwxr-xr-x. 7 root root 4096 Jul 17 03:45 ..
	-rw-r--r--. 1 andy andy 18 Jul 18 2013 .bash_logout
	-rw-r--r--. 1 andy andy 176 Jul 18 2013 .bash_profile
	-rw-r--r--. 1 andy andy 124 Jul 18 2013 .bashrc
	-rw-r--r--. 1 andy andy 124 Jul 18 2013 /home/andy/.bashrc
	-rw-r--r--. 1 andy andy 18 Jul 18 2013 /home/andy/.bash_logout
	-rw-r--r--. 1 andy andy 176 Jul 18 2013 /home/andy/.bash_profile
	#查詢目錄內Owner為[andy]的資料

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2016年5月5日星期四

Juniper 查看歷史指令

	root> show cli history
	14:01:17 -- configure
	14:24:22 -- show version
	14:27:40 -- show configuration \|set
	14:27:52 -- configure
	14:41:26 -- show system alarms
	14:41:37 -- .showchassishardware
	14:41:51 -- show chassis hardware
	14:41:59 -- show chassis fpc pic-status
	14:42:07 -- show ppp interface pp0 extensive
	14:42:37 -- show log messages
	14:42:42 -- show log messages \|no-more
	14:43:16 -- show configuration \|display set \|no-more
	14:55:44 -- configure
	14:57:57 -- show cli history

	root>

view raw 2016050615.sh hosted with ❤ by GitHub

Juniper 顯示設定

	root# run show configuration \|display set
	set version 12.1R1.9
	set system syslog user * any emergency
	set system syslog file messages any notice
	set system syslog file messages authorization info
	set system syslog file interactive-commands interactive-commands any

	[edit]

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Juniper 網路卡設定

	[edit]
	root# set interfaces em0 unit 0 family inet address 192.168.1.1/24

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Juniper 設定主機名稱

	[edit]
	root@R1# set system host-name R1

	[edit]
	root@R1# set system domain-name icto.corp

	[edit]
	root@R1# set system name-server 8.8.8.8

view raw 2016050614.sh hosted with ❤ by GitHub

Juniper 設定靜態路由

	[edit]
	root@R1# set routing-options static route 10.50.0.0/24 next-hop 192.168.1.5
	[edit]
	root@R1# commit
	commit complete

	[edit]
	root@R1# run show route

	inet.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
	+ = Active Route, - = Last Active, * = Both

	10.10.0.1/32 *[Local/0] 01:59:43
	Reject
	10.50.0.0/24 *[Static/5] 00:00:03
	> to 192.168.1.5 via em0.0
	192.168.1.0/24 *[Direct/0] 01:59:43
	> via em0.0
	192.168.1.1/32 *[Local/0] 01:59:43
	Local via em0.0

	[edit]

view raw 2016050612.sh hosted with ❤ by GitHub

Juniper 顯示路由資訊

	[edit]
	root@R1# run show route

	inet.0: 3 destinations, 3 routes (3 active, 0 holddown, 0 hidden)
	+ = Active Route, - = Last Active, * = Both

	10.10.0.1/32 *[Local/0] 01:59:02
	Reject
	192.168.1.0/24 *[Direct/0] 01:59:02
	> via em0.0
	192.168.1.1/32 *[Local/0] 01:59:02
	Local via em0.0

	[edit]

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	root@R1# run show route table inet.0
	#顯示單撥路由
	root@R1# run show route table inet.1
	#顯示多撥路由

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Linux 硬碟分割

新的磁碟管理工具：gdisk
查看磁區分割狀態：lsblk
核心的磁區分割狀態：/proc/partitions
查看磁碟ID：blkid
傳統的磁碟分割工具：fdisk
範例：
1. gfisk：新增一個磁碟分割區

新的磁碟管理工具：gdisk

[root@rhel7 ~]# yum install gdisk -y

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	[root@rhel7 ~]# gdisk -l /dev/sda
	GPT fdisk (gdisk) version 0.8.6

	Partition table scan:
	MBR: MBR only
	BSD: not present
	APM: not present
	GPT: not present


	***************************************************************
	Found invalid GPT and valid MBR; converting MBR to GPT format.
	***************************************************************

	Disk /dev/sda: 266338304 sectors, 127.0 GiB
	Logical sector size: 512 bytes
	Disk identifier (GUID): 75131CAA-CA89-4CB7-865F-FBC4C4228B56
	Partition table holds up to 128 entries
	First usable sector is 34, last usable sector is 266338270
	Partitions will be aligned on 2048-sector boundaries
	Total free space is 202440637 sectors (96.5 GiB)

	Number Start (sector) End (sector) Size Code Name
	1 2048 411647 200.0 MiB 8300 Linux filesystem
	2 411648 41371647 19.5 GiB 8300 Linux filesystem
	3 41371648 61851647 9.8 GiB 8300 Linux filesystem
	5 61853696 63901695 1000.0 MiB 8200 Linux swap

view raw 2016050607.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# gdisk /dev/sdb
	GPT fdisk (gdisk) version 0.8.6

	Partition table scan:
	MBR: not present
	BSD: not present
	APM: not present
	GPT: not present

	Creating new GPT entries.

	Command (? for help): m
	b back up GPT data to a file
	c change a partition's name
	d delete a partition
	i show detailed information on a partition
	l list known partition types
	n add a new partition
	o create a new empty GUID partition table (GPT)
	p print the partition table
	q quit without saving changes
	r recovery and transformation options (experts only)
	s sort partitions
	t change a partition's type code
	v verify disk
	w write table to disk and exit
	x extra functionality (experts only)
	? print this menu

	Command (? for help):

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lsblk

	[root@rhel7 ~]# lsblk
	NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
	sda 8:0 0 127G 0 disk
	├─sda1 8:1 0 200M 0 part /boot
	├─sda2 8:2 0 19.5G 0 part /
	├─sda3 8:3 0 9.8G 0 part /usr
	├─sda4 8:4 0 1K 0 part
	└─sda5 8:5 0 1000M 0 part [SWAP]
	sdb 8:16 0 127G 0 disk
	sr0 11:0 1 1024M 0 rom

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核心的磁區分割狀態：/proc/partitions

	[root@rhel7 ~]# cat /proc/partitions
	major minor #blocks name

	11 0 1048575 sr0
	8 16 133169152 sdb
	8 0 133169152 sda
	8 1 204800 sda1
	8 2 20480000 sda2
	8 3 10240000 sda3
	8 4 1 sda4
	8 5 1024000 sda5

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查看磁碟ID：blkid

	[root@rhel7 ~]# blkid
	/dev/sda1: UUID="059b93ee-695e-4929-8453-82e922e2bada" TYPE="xfs"
	/dev/sda2: UUID="58eb227d-08b5-47b8-8a6b-909f3bb3c8be" TYPE="xfs"
	/dev/sda3: UUID="881ba74d-1888-4dd8-9400-5562ec68172b" TYPE="xfs"
	/dev/sda5: UUID="202a5349-b907-40f3-ac16-80944c40a6a1" TYPE="swap"

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傳統的磁碟分割工具：fdisk

	[root@rhel7 ~]# fdisk -l

	Disk /dev/sdb: 136.4 GB, 136365211648 bytes, 266338304 sectors
	Units = sectors of 1 * 512 = 512 bytes
	Sector size (logical/physical): 512 bytes / 512 bytes
	I/O size (minimum/optimal): 512 bytes / 512 bytes


	Disk /dev/sda: 136.4 GB, 136365211648 bytes, 266338304 sectors
	Units = sectors of 1 * 512 = 512 bytes
	Sector size (logical/physical): 512 bytes / 512 bytes
	I/O size (minimum/optimal): 512 bytes / 512 bytes
	Disk label type: dos
	Disk identifier: 0x0009d590

	Device Boot Start End Blocks Id System
	/dev/sda1 * 2048 411647 204800 83 Linux
	/dev/sda2 411648 41371647 20480000 83 Linux
	/dev/sda3 41371648 61851647 10240000 83 Linux
	/dev/sda4 61851648 266338303 102243328 5 Extended
	/dev/sda5 61853696 63901695 1024000 82 Linux swap / Solaris

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	[root@rhel7 ~]# fdisk /dev/sdb
	Welcome to fdisk (util-linux 2.23.2).

	Changes will remain in memory only, until you decide to write them.
	Be careful before using the write command.

	Device does not contain a recognized partition table
	Building a new DOS disklabel with disk identifier 0x082377de.

	Command (m for help): p

	Disk /dev/sdb: 136.4 GB, 136365211648 bytes, 266338304 sectors
	Units = sectors of 1 * 512 = 512 bytes
	Sector size (logical/physical): 512 bytes / 512 bytes
	I/O size (minimum/optimal): 512 bytes / 512 bytes
	Disk label type: dos
	Disk identifier: 0x082377de

	Device Boot Start End Blocks Id System

	Command (m for help):

view raw 2016050602.sh hosted with ❤ by GitHub

	[root@rhel7 ~]# fdisk /dev/sda
	Welcome to fdisk (util-linux 2.23.2).

	Changes will remain in memory only, until you decide to write them.
	Be careful before using the write command.


	Command (m for help): p

	Disk /dev/sda: 136.4 GB, 136365211648 bytes, 266338304 sectors
	Units = sectors of 1 * 512 = 512 bytes
	Sector size (logical/physical): 512 bytes / 512 bytes
	I/O size (minimum/optimal): 512 bytes / 512 bytes
	Disk label type: dos
	Disk identifier: 0x0009d590

	Device Boot Start End Blocks Id System
	/dev/sda1 * 2048 411647 204800 83 Linux
	/dev/sda2 411648 41371647 20480000 83 Linux
	/dev/sda3 41371648 61851647 10240000 83 Linux
	/dev/sda4 61851648 266338303 102243328 5 Extended
	/dev/sda5 61853696 63901695 1024000 82 Linux swap / Solaris

	Command (m for help):

view raw 2016050603.sh hosted with ❤ by GitHub

範例：gfisk：增一個磁碟分割區

	[root@rhel7 ~]# gdisk /dev/sdb
	GPT fdisk (gdisk) version 0.8.6

	Partition table scan:
	MBR: not present
	BSD: not present
	APM: not present
	GPT: not present

	Creating new GPT entries.

	Command (? for help): n
	Partition number (1-128, default 1):
	First sector (34-266338270, default = 2048) or {+-}size{KMGTP}:
	Last sector (2048-266338270, default = 266338270) or {+-}size{KMGTP}: +1G
	Current type is 'Linux filesystem'
	Hex code or GUID (L to show codes, Enter = 8300):
	Changed type of partition to 'Linux filesystem'

	Command (? for help): p
	Disk /dev/sdb: 266338304 sectors, 127.0 GiB
	Logical sector size: 512 bytes
	Disk identifier (GUID): 57920DFF-C2D3-46BF-B1E1-A45181220B6C
	Partition table holds up to 128 entries
	First usable sector is 34, last usable sector is 266338270
	Partitions will be aligned on 2048-sector boundaries
	Total free space is 264241085 sectors (126.0 GiB)

	Number Start (sector) End (sector) Size Code Name
	1 2048 2099199 1024.0 MiB 8300 Linux filesystem

	Command (? for help): w

	Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
	PARTITIONS!!

	Do you want to proceed? (Y/N): y
	OK; writing new GUID partition table (GPT) to /dev/sdb.
	The operation has completed successfully.

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2016年5月1日星期日

Linux RHEL7 查看所有開機過程

	[root@localhost ~]# vi /boot/grub2/grub.cfg
	#linux16 /vmlinuz-3.10.0-123.el7.x86_64 root=UUID=8ede3c03-88e9-4189-92b2-0d77b2e44d9d ro rd.lvm.lv=centos/swap vconsole.font=latarcyrheb-sun16 rd.lvm.lv=centos/root crashkernel=auto vconsole.keymap=us rhgb quiet net.ifnames=0

	linux16 /vmlinuz-3.10.0-123.el7.x86_64 root=UUID=8ede3c03-88e9-4189-92b2-0d77b2e44d9d ro rd.lvm.lv=centos/swap vconsole.font=latarcyrheb-sun16 rd.lvm.lv=centos/root crashkernel=auto vconsole.keymap=us net.ifnames=0

	#將 rhgb quiet 拿掉即可

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Linux Script 大量查詢 Domain MX RR

	domain=$(cat /root/mx.txt)
	for domain in $domain
	do
	dig @8.8.8.8 $domain mx\|grep -v ";"\|grep -v '^\s*$'
	done

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Cisco Route OSPF

建立 Area

	R1#conf t
	Enter configuration commands, one per line. End with CNTL/Z.
	R1(config)#router ospf 1
	R1(config-router)#netwo
	R1(config-router)#network 192.168.1.0 255.255.255.0 area 1
	R1(config-router)#network 10.30.0.0 255.255.255.0 area 13
	R1(config-router)#do wr
	Building configuration...
	[OK]

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查看鄰居

	R1#show ip ospf neighbor

	Neighbor ID Pri State Dead Time Address Interface
	10.10.0.1 128 FULL/BDR 00:00:33 192.168.1.1 FastEthernet0/0
	10.20.0.1 128 FULL/DR 00:00:32 192.168.1.2 FastEthernet0/0

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R1 Config

	!
	hostname R1
	!
	interface FastEthernet0/0
	ip address 192.168.2.1 255.255.255.0
	duplex auto
	speed auto
	!
	interface FastEthernet0/1
	ip address 10.1.0.1 255.255.255.0
	duplex auto
	speed auto
	!
	!
	router ospf 1
	log-adjacency-changes
	network 10.1.0.0 0.0.0.255 area 1
	network 192.168.2.1 0.0.0.0 area 0
	!

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R2 Config

	!
	hostname R2
	!
	!
	interface FastEthernet0/0
	ip address 192.168.2.2 255.255.255.0
	duplex auto
	speed auto
	!
	interface FastEthernet0/1
	ip address 10.2.0.1 255.255.255.0
	duplex auto
	speed auto
	!
	router ospf 1
	log-adjacency-changes
	network 10.2.0.0 0.0.0.255 area 2
	network 192.168.2.2 0.0.0.0 area 0
	!

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Cisco 介面設定 IP

設定IP、啟用網卡

	R1#conf
	R1(config)#int f0
	R1(config-if)#ip address 192.168.1.3 255.255.255.0
	R1(config-if)#no sh

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	R1(config-if)#do sh ip int br
	Interface IP-Address OK? Method Status Protocol
	Ethernet0 unassigned YES unset administratively down down
	Ethernet1 unassigned YES unset administratively down down
	FastEthernet0 192.168.1.3 YES manual up up

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連線測試

	R1(config-if)#do ping 192.168.1.1

	Type escape sequence to abort.
	Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
	!!!!!
	Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
	R1(config-if)#do ping 192.168.1.2

	Type escape sequence to abort.
	Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
	!!!!!
	Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

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