Basic MySQL commands and basic mysql commands
SQL
Statement
Mysql version: For mysql-5.6.36 version1.1 Common commands
# View database mysql> show databases; show databases like '% pres %'; # fuzzy query # View table mysql> use xzymysql> show tables; # view permissions show grants for oldboy @ '10. 0.0.% '; # view the column mysql> use xzymysql> desc test;
1.2 l
Common Ruby Package Manager gem commands and common rubygem commands
Gem-related commands
1. display the help and version of gemCopy codeThe Code is as follows:Gem-h/-- help# Display the help of gem
Gem-v/-- version# Display the gem version number2. List all available software in the remote databaseCopy codeThe Code is as follows:Gem query -- remote# Short comman
Adb commands and androidadb commands in android
AdbCommon commands
1. display all Android platforms in the system:
Android list targets
2. Display All AVD (simulators) in the system ):
Android list avd
3. Create an AVD (simulator ):
Android create avd -- nameName-- TargetPlatform No.
4. Start the simulator:
Emulator-avdName-Sdcard ~ /Name. Img (-skin 1280x800)
5.
Official Android commands and official android commands
Original article: www.libgdx.cnThe Android SDK contains a variety of tools to help you create mobile applications based on the Android platform. These tools are generally divided into SDK tools and platform tools. The SDK is independent of the Android version. The Platform tool is designed to support the features of the latest Android Platform.SDK too
Common commands for linux system monitoring and Common commands for linux monitoring
Original article: http://blog.sina.com.cn/s/blog_68f1c17001016uvy.html
Linux provides many tools used to monitor the system. These tools can be used to find the bottleneck that may lead to reduced system performance. Slow system response is not always caused by slow CPU usage. It may also be caused by slow disk speed, low
Commands to implement TelnetSSH, Telnet, rlogin(1) SSHThe SSH command is the Client Connection tool in the OpenSSH suite, which enables secure Telnet server to SSH encryption protocol. The SSH command is used to telnet to the Linux host.Common format:ssh [-l login_name] [-P port] [[Email Protected]]hostnameMore details can be viewed with ssh-h.Grammar:SSH (options) (parameters)Options:-1: Enforce SSH protocol version 1;-2: Enforce SSH protocol version
Vim the mode and transformation relationship 1 is shown. A simple introduction to command patterns and common commands for extended mode. 650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M02/9D/C4/wKioL1mFjIHAnfyFAAC6xpPfTZI075.png "title=" a.png "Width=" "height=" 242 "border=" 0 "hspace=" 0 "vspace=" 0 "style=" width:400px;height:242px; "alt=" Wkiol1mfjihanfyfaac6xppftzi075.png "/>Figure 1Command modeJump between characters:h : Left L: Right
Unit eighth body processing commands and TAR commandsUse the Cat command to merge files verticallymethod of vertical merging of two kinds of documentsArchive and archive technologypurpose of ArchivingWhat is archivefunctions of the tar commandcommon options for the tar commandCreate, view, and extract archive files using the tar commandusing the tar command to create an archive fileuse the tar command to view an archive fileextracting an archive file
whereis Command: Locate the binary, source, and manual page files for a command"Features" Find relevant locations for files, manual pages, commands, etc.,SyntaxWhereis Options argument"Common Options"-B: Find only the binary file location-m: Find only the man pages section"Instance 1" finds the location of the binary file[Email protected] tmp]# whereis-b passwdpasswd:/usr/bin/passwd/etc/passwd[[email protected] tmp]# whereis-b Shadowsha Dow:/etc/shado
, to protect the Windows XP system dual Password
Wupdmgr widnows UPDATE
CLIPBRD Clipboard Viewer
ODBCAD32 ODBC Data Source Manager
Nslookup IP Address Detector
Start running Command collection
Winver---------Check the Windows version
Wmimgmt.msc----Open Windows Management Architecture (WMI)
Wupdmgr--------Windows Update
wscript--------Windows Script Host Settings
Write----------WordPad
WINMSD---------System Information
Wiaacmgr-------Scanner and Camera Wizard
Winchat--------XP comes
directory cannot be deleted because the TMP directory has other files in addition to the 123 directory, and the directory/123/456/789,/123/456,/123 have been deleted.Four, RM commandRM commands can be used to delete files and directoriesFor example, I first create a directoryMkdir-p/tmp/123/456/789And then create a textTouch/tmp/123/456/789/123.txtPerformRm/tmp/123/456/789/123.txtWill ask whether to delete the normal empty file/tmp/123/456/789/123.tx
The most commonly used help Command help -- helphelp cd to view the built-in command use infoman help cd to view the use of the built-in command to get help: man -- help Baidu google call (friend) Books Forum QQ group communication based on the principle that the problem can be solved in the shortest time, the longer the loss, the greater the loss. -- Help and help can both be used to obtain help information, but there is a significant difference: help: displays simple information about bash she
In linux, ifconfig, shutdown, and other commands cannot use the _ enable Shell command Java code. why cannot I use the ifconfig command in RedHatLinux5? after installing RedHatLinux5, I use some commands on the terminal, such: ifcinfig view local machine...
In linux, commands such as ifconfig and shutdown cannot use the _ enable Shell command Java code. why canno
Comparison between Shell script commands and DOS batch processing commands-Linux general technology-Linux technology and application information. The following is a detailed description. [I = s] This post was last edited by lijiang at, January 10 ,.
,
In fact, the defective DOS batch processing file language can still write some powerful scripts, although they generally require external tools. therefore, i
Summary of common mysql commands and summary of common mysql commands# Modifying Field TypesAlter table 'table _ name' modify column ip varchar (50 );# Adding fieldsAlter table 'table _ name' add ip varchar (50 );# Add a primary key (primary key index)Alter table 'table _ name' add primary key ('IP ');# Add a UNIQUE (UNIQUE index)Alter table 'table _ name' add unique ('IP ');# Add an INDEX (Common INDEX)Alt
Linux svn commands and svn commands
Check whether svn: svnserve -- version is installed
Close svn service: killall svnserve
Create svn Library: svnadmin create/opt/svn/repos
Configure Automatic Start: Put svnserve-d-r/opt/svn/repos in the last line of/etc/rc. d/rc. local.
Start svn: svnserve-d-r/opt/svn/repos
If svn is already running, run it on another port: svnserve-d-r/opt/svn/repos -- listen-port 3391.
Differences between linux su and sudo commands: linuxsusudo commandsI. Use the su command to temporarily switch user identities1. Conditions and power of su
The su command is a tool for switching users. How can this problem be solved? For example, if we log on as a normal user beinan, but want to add a user task and execute useradd, The beinan user does not have this permission, and this permission is exactly owned by the root user. There are two solu
Linux search commands and Linux search commands
Which command Which is used to find system commands, such as ls and cat. It is searched from the folder specified by the PATH variable. When the specified folder contains a binary file with the same name as the command, the path of the file, that is, the path of the command.However, it seems that the file must be a
Some common Shell commands and common Shell commands
Common system commands]
Passwd [hostname]Change Password
Useradd [hostname]Add User
Su-Switch to the root user
Ssh [hostname]Ssh connection
Cd [directory]Go to the directory
Sudo chown [username]Grant corresponding permissions to users
Ctrl + cStop the current command (such as ping)
Vi [filename]Use the vim edi
Common gdb commands and gdb commands
When debugging a program, gdb is a powerful tool. The proper use of gdb can solve many bugs in the program.
Gdb does not check syntax errors. It is a gcc or g ++ task. gdb does debugging.
Note:
(1) The gdb program name, such as [corefile], indicates the usage of commands. The content in [] is optional, that is, you can add or
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