linux basic commands

CD(change direction): Changing the Directory{CD/: Go to the root directoryCD Directory Name: Enter the directoryCd.. : Go to the previous level directoryCd. : Enter the current directoryCD ~: Enter the host (home) directory (cd ~ Directory Name:

First, shutdown, restart1. Turn off the machineShutdown option [option] ... Parameter (time) option:-R: Restart-H: Shutdown-C: Cancel the previously set restart or shutdown command-K: Send only reminder time format: default equivalent to +1hh:mm now:

1. Install the VMware Visual machine secret key2. Installing CentOS6.5Linux Common commands1.PWD View current Path2.ls view directories and files under the current pathLs-l viewing directories and files as a listLs-la View all directories and files

Basic knowledge of computer playing:CPU (operator, Controller), memory, I/O (input device, output device)程序运行模式： 用户空间：user space,us （可执行普通指令） 内核空间：system space （可执行特权指令）POS：Postable Operating System 可移植操作系统 POSIX 可移植操作系统规范运行程序格式：Windows：EXE，

A grep find cut1.grep searching for a string -N Display Line number-R Recursive Sub-directory "^string" line starting with stringLine with "string$" ending in string"^string$" searches only string rows that do not contain other characters * All

Basic commands and directory structure directories in Linux First, the Linux basic directory structure II. basic Commands Third, browse the directory Iv. Intermediate Command Five, change the password VI. environment

first, the Linux operating environment~ location is under the/root/directory Root: User name currently logged in @ delimiter Chengliang: Host Name ~: Current path location Linux directory structure:To switch directories:New

◊ Basic Framework :A) directory Operations commandb) File Operation commandsOne, directory operation command:1. Ls command:Ls–a: Show hidden filesLs–l: Show All Files (excluding hidden files)ll equivalent to Ls-lLs–h: Show file Size (how many k)Ls–f:

Exit: Log outDate: View timeBC: ComputerHwclock: motherboard timeCal: calendar / calendarShutdown-h/-r: shutdown / restart reboot: restartPoweroff: Shut down the machineAlias: aliasesUnalias: revoke aliasesPWD: View current directoryCD: switch

My Linux Learning Notes Blog Category: Linux Http://www.blogjava.net/huanzhugege/archive/2007/08/23/linux.html1Top look at the currently running processKill-9 PID terminates a process (tree)The CD returns to the root

Allow non-root users to use "sudo"Root login system, execute "visudo", add a new rule according to the example (remember the password entered is the current user password, not the root password)#不需要密码执行sudo命令Hadoop all= (All) Nopasswd:allDateTime

Stat command: Command Function ; Display the status of a file or file system command Format ; stat [ options ] ... file Command parameters:- F status of the file system- Z Print SELinux Security Catalog- T display information in a concise

Date command1. Command function: The date command can be used to display or set the system's dates and times.2. Command format: Date [options] ... Format3. Command parameters:-D Displays the date and time that the string refers to650) this.width=650;

One: TimeDate-View current time date  %y:%m:%d--Specify format output date-s "00:00:00"  --Modify time 00:00:00cal  --command line View Calendar Uptime--run time information & nbsp; two: Output view echo ""  --return "" Specify content Cat filename--

Linux common Commands (ii). txt-----------users, user groups, file systems, and networksFirst, the user's management1. Management of the userUseradd + "User name" new how users such as: Useradd dy-P: Specify the user's password-C: Make an annotated

The command we use when using Linux is nothing more than command + options + parametersExample Shutdown-h now shutdown/is the command to shut down-h/is the option now/is the parameterMain learning File/directory operations: View, create, copy,

Linux command  su: Switch account Note: When there is a # symbol, this is the superuser; when there is a $ sign, this is the normal user  cd: Enter the specified directory LL: Vertical display directory content ls: Horizontal display directory

shell--command InterpreterThere are several different types of shells in the Linux environment, where the bash shell is the default installed and used shellClear the terminal screen: Clear, Ctrl+l and CLS (if first input: alias Cls=clear) effect is

useradd [option] user_name: This command is used to add a user[option]-R:-M:-G:-G:-P:-S:-U:-D:-F:Userdel-r User: Delete users in/etc/passwd,/etc/shadow,/etc/group Records, while deleting the user's home directory;Usermod [-u uid] [-D home[-m]] [-s

1.Output RedirectionLinux The default input is the keyboard, and the output is the monitor. You can use redirection to change these settings. For example , when using the WC command to manually enter a text to calculate the number of characters,