2. File operation, file view, find lookup

Linux system download

http://vault.centos.org/

http://archive.kernel.org/centos-vault/5.10/isos/x86_64/

http://mirror.symnds.com/distributions/CentOS-vault/5.10/isos/x86_64/#下载系统URL

RPM Package Download

http://dl.fedoraproject.org/pub/epel/6/i386/

Learn

Http://www.kwx.gd/CentOSApp/CentOS-Fail2Ban.html

Python Learning

Http://edu.51cto.com/lesson/id-29673.html

Rookie Net

http://www.runoob.com/#redis, Python, MongoDB, git learning

/root//Admin home Directory

/home//general user's Directory

/boot//boot file storage location

/etc/config file

/bin//commands used by ordinary users

/sbin//Commands used by administrators

/var//Store Some information (such as logs)

/dev//device file storage location

Linux face questions

Introduction to Linux Services

TUI: Text user interface

GUI: Graphical user interface

CLI: Command Line interface

Ifconfig | Grep-po "(? <=ADDR:). * (? = bcast)" #取以addr开头和Bcast结尾的中间那一串字符

Ss-tln

echo $LANG View System Character Set

Yum List all ansible* #搜索ansible

history-d 2;history-c #分号前面删除第二行历史命令, semicolon empty polygon Clear History command

Histcontrol=ignorespace #把这条命令放在/etc/profile, do not log sensitive commands

See if the port is occupied

Lsof-i: 6379

Cal View system date

Background output

Nohup rabbitmq-server > Myout.file 2>&1 &

Nohup rabbitmq-server &>/dev/null &

IP Web site Query method

In addition, professional query export IP site has a lot. Similar to ip138 and ip.cn. But small Nithya suggested ip138 query more accurate OH www.ip138.com

One: Locate command

The locate command is used to find a file that is faster than the search command, and it requires a database that is built by a daily routine work (crontab) program. Once we have established this database, we can easily search for the required files.

Run First: UpdateDB (in that directory can be placed in the crontab) after the SLOCATE.DB database generated under/var/lib/slocate/can be quickly found. Execute the #updatedb command directly at the command prompt:

Example: Find related words issue

$ locate Issue

Egrep equivalent to Grep-e #-E is the meaning of the exhibition

ll--full-time #显示文件的全日期

View Concurrency Command Netstat-na | grep 80 | awk '/^tcp/{++s[$NF]} END {for (a in S) print A, s[a]} '

VMware vsphere http://edu.51cto.com/lesson/id-36772.html

Guangzhou 202.96.128.86 202.96.128.166

Jiangsu 114.114.114.114

Use the CRONTAB-E command to add a new task to the task plan.

echo "*/5 * * * * */usr/sbin/ntpdate x.x.x.x" > File.txt

Crontab file.txt

Uptime Last Who

Apache Traffic Server #缓存代理服务器

Cacti plug-in detailed--weathermap #这是一个绘制网络拓扑的插件

Rsync+inotify

Rsync+git

Create an ISO file using a catalog file

Mkisofs-r-o path/iso filename Directory file path

Example: Mkisofs-r-o/opt/mycd.iso/home

which

Sudo-i #切换到管理员

sudo passwd #给管理员设置密码

Tcpdump-nnn-i any host 192.168.1.233 #-i-any on any port monitoring

Tcpdump-n-I eth0 host 192.168.1.233 or 192.168.1.234 #-n convert domain name to ip-i-eth0 eth0 Port monitoring

Rsync-avz--progress abc.txt-e "ssh-p" [Email protected]:/tmp #rsync使用不同端口号发送文件

Shutdown-h now

Shutdown-h +15 "Computer shuts down after 15 minutes"

Scp-i Sshkey

Rsync-e ' Ssh-p22-i sshkey '

Touch A-' date+%f4 '

Date +%m

Date +%d

Date +%y

Crontab-l View current Tasks

Select Sleep (12);

Echo $PATH

Command aliases

/etc/bashrc

grep root/etc/passwd

Alias grep= ' grep--color '

BASENAME/ETC/PASSWD gets the file name of a path

Dirname/var/www/html/a.html Gets the directory name of a path

Cat-b/test.txt View file display lines

Watch-n 1 Route-n One second refresh

Uuidgen randomly generate UUID numbers

Wc-m View character Count

Wc-l Viewing rows

Wc-w See how many words

Seq 10 20

BLKID/DEV/SDA1 Viewing UID

echo "123" | passwd--stdin "$1_up"

Chkconfig--del MySQL

MV/ETC/INIT.D/MYSQL{,D}//rename MySQL to Mysqld

CP Ifcfg-{eth0,br0}//change Ifcfg-eth0 to Ifcfg-br0

Md5sum/etc/my.cnf

Head-1/dev/urandom | Md5sum

echo $RANDOM output Random numbers

Head-1/dev/urandom | md5sum | Cut-b-5 intercept numbers from 1 to 5

Echo-e "\e[32;43;1mok\e[0m"

32 foreground 43 background color 1m highlight 0m stop output OK

echo ' 409600/1024 ' | Bc

Under Terminal

Ctrl +u to delete the front

Ctrl +k to delete the back.

Iptables-l forward-s 202.1.1.10-p TCP--sport 80-j ACCEPT

^10^20, replace the 10 above with 20.

>/var/log/messages Empty Log

Egrep ' abc|123 ' *.txt |sort|uniq-c take the intersection of ABC and 123

ALT +. Key, enter the command that was entered last

echo "Obase=16;11" | BC//16 Binary Conversion

Yum-y Install Unix2dox//Installation

Unix2dos new.sh//conversion, drag Linux files to Windows, files are not wrapped

Yum-y Install Dox2unix//Installation

Dox2unix new.sh//conversion, drag Windows files to Linux, file without self-wrapping

Yum Info httpd//view summary information

6, $s/^/#/

Operation and Maintenance 5th, 6 days of experimental failure, RPM package production failed, MySQL Cluster management experiment failed

System-config-network

System-config-date

IPv6 128-bit

#cat/etc/services is written in a list of port-corresponding services. Common service ports

Tail-1/etc/hosts.deny >>/etc/hosts.allow

Vimdiff abc.txt abb.txt//Compare two files What's the difference?

Open relay Opening Relay

SOA Initiation Authorization

$TTL86400//Cache time 86400 represents one day

NS Name Server

A name –> IP

PTR Reverse IP-Name

MX Mail Exchange

CNAME: Aliases

fqdn= hostname. Domain name suffix

FQDN: Fully qualified domain name/fully qualified domain name/full name Domain

# watch–n 1 IPTABLES–NVL//Refresh the following commands every second

> ~/ssh

PIDOF process name View ID number

Ping-c 3 192.168.1.1

Evince nrpe.pdf Open File

Service Port Selection

Linux system port number range is 0-65535, different range has different meanings

0 Not used

1-1023 system reserved, can only be used by the root user

1024-4999 free distribution by client program

5000-65535 free distribution by server-side programs

This article is from the "Wsyht blog" blog, make sure to keep this source http://wsyht2015.blog.51cto.com/9014030/1790232

2. File operation, file view, find lookup