linux at command examples

One, the Curl command parameter-a/--append when uploading a file, attach to target file-a/--user-agent Two, commonly used curl instance1, crawl the page content into a file[Email protected]]# curl-o home.html http://www.codesky.net2, with-O (uppercase), the following URL to specific to a file, or not catch it down. We can also use the regular to grab things.[Email protected]]# curl-o http://www.codesky.net/wp-content/uploads/2010/09/compare_varnish.jp

I can see that this configuration is easy to understand on the Internet, so I will turn around. let's take a look at it and hope it will be helpful for your work. The security awareness of network administrators is much more important than shouting Linux security. Iptables-Fiptables-Xiptables-F-tmangleiptables-tmangle-Xiptables-F-tnatiptables-tnat-X first I can see that this configuration is easy to understand on the Internet, so I will turn around. l

Appendix B: examples of common command applications========================================================== ========================================================== ==================================1. Create and delete DatabasesCreate Database db1; -- create database db1Drop database db1; -- delete database db1 2. Create and delete data tablesCreate Table T1 (-- Create Table T1, T1 contains two fieldsC

Tags: SYN pipeline tom case compilation install l command files output redirection mustCyanobacteriaDate: 2018.7.3Foreword this article characteristic to teach the fishing : Learn the command learning method, use: No longer rote, refuse to aimless; accurate : All commands are executed through (environment for CENTOS7), refuse to copy paste; High practicality : commands are used in practical

Ls- L : Long Format File type: the - : Normal file (f)D: Catalog FilesB: block device files (blocks)C: character device files (character)L: Symbolic Link file (symbolic Linkfile)P: command Pipe file (pipe)S: socket file (socket) File permissions: 9-bit, every 3-bit group, each group: rwx (Read, write, execute), r-- Number of hard links to files owner of the file Genus Group of files File size (size), in bytes timestamp (timestamp): Last Modified time

create derivative versionsThe philosophical thinking of Linux:1, all documents; almost all resources, including hardware devices, are organized into file formats;2, consisting of a number of small programs for a single purpose; A program that only implements a function, and does well, the combination of small programs to complete complex tasks;3, try to avoid interacting with the user; Objective: To implement script programming to automate certain fu

(so Easy) #1. Note #在进行shell编程时, the sentence at the beginning of the # represents the comment until the end of the line. #我们真诚地建议您在程序中使用注释. If you use annotations, #那么即使相当长的时间内没有使用该脚本, you can understand how the script works in a very short period of time. #2变量 #在其他编程语言中您必须使用变量. In shell programming, all variables are composed of strings, and you do not need to declare variables. To assign to a variable, you can write: #变量名 = value #取出变量值可以加一个美元符号 ($) in front of the variable: #hello world #

conversion work at this point. --version Displays version information. Mans :NAME : Command name and function brief descriptionSynopsis : Usage notes, including available optionsDESCRIPTION : A detailed description of the command function, which may include the meaning of each optionOPTIONS : Explains the meaning of each optionFILES : The configuration file associated with this commandBUGS :

1. Beijing fast _ Three build Q1446595067 Linux is a set of and based on the GNU Combination Software and the Linux kernel. 2. What is a shell? We often hear Shell,shell, but what is a shell? Shell---> Shell, we all know that the Linux kernel is used to handle all the commands in the Linux System Cent

Linux cp/scp command + scp command details, cpscp + scp command details Name: cp Permission: All Users Usage: Cp [options] source dest Cp [options] source... directory Note: copy one file to another or copy several files to another directory. Count -A tries its best to copy the file status, permissions, and other infor

Linux Command sorting (commonly used) and linux Command sorting Common Linux commands 1. There are two types of users in Linux: Super Users (root) and normal users. A) Super User: You can do anything in

Linux Command find (2), linux Command find The previous article has introduced the test of expressions, which is the core of the find command. Now we will introduce the options and actions of expressions.(1) options -D,-depth: the two serve the same purpose. man's manual

;# File containing "update"/Etc/acpi/ac. d/85-anacron.sh: # (Things like the slocate updatedb cause a lot of IO.) Rather/Etc/acpi/resume. d/85-anacron.sh: # (Things like the slocate updatedb cause a lot of IO.) Rather/Etc/acpi/events/thinkpad-cmos: action =/usr/sbin/thinkpad-keys -- update3. Reverse search. The preceding examples show how to find and print the rows that meet the condition. The "-v" parameter can be used to print th

command-line editing:Cursor Jump:CTRL + A: Skip to the beginning of the commandCtrl+e: Jump to the end of the command lineCtrl+u: Delete the cursor to the beginning of the command lineCTRL+K: Delete the cursor to the end of the command lineCtrl+l: Clear ScreenCtrl+d: Delete the contents after the cursorCommand history:

In unix and linux, the chmod command is used to change the permissions of files and directories. This is a must for unix and linux users to be familiar with many In unix and linux, the chmod command is used to change the permissions of files and directories. This is one of t

the path defined by the PATH environment variable, the command to be executed the first time it is foundDirect completion: Tab, the user given a string with only one single corresponding commandIndirect completion: The user given a string for the beginning of the corresponding command is not unique, double-click tab to give all the list of satisfied conditions3. Path completionTake the user-given string as

, and then have the owner have readable permissionsExample 5: Add permissions to all files in a directory and its subdirectoriesCommand:Chmod-r u+x test4Output:[Email protected] test]# CD test4[Email protected] test4]# Ls-alTotal 312drwxrwxr-x 2 root root 4096 11-13 05:50.Drwxr-xr-x 5 root root 4096 11-22 06:58..-rw-r--r--1 root root 302108 11-12 22:54 log2012.log-rw-r--r--1 root root 11-12 22:54 Log2013.log-rw-r--r--1 root root 0 11-12 22:54 log2014.log[Email protected] test4]# CD.[Email protec

312drwxrwxr-x 2 root root 4096 11-13 05:50.Drwxr-xr-x 5 root root 4096 11-22 06:58..-rw-r--r--1 root root 302108 11-12 22:54 log2012.log-rw-r--r--1 root root 11-12 22:54 Log2013.log-rw-r--r--1 root root 0 11-12 22:54 log2014.log[Email protected] test4]# CD.[Email protected] test]# chmod-r u+x test4[Email protected] test]# CD test4[Email protected] test4]# Ls-alTotal 312drwxrwxr-x 2 root root 4096 11-13 05:50.Drwxr-xr-x 5 root root 4096 11-22 06:58..-rwxr--r--1 root root 302108 11-12 22:54 log20

protected] test]# CD test4[Email protected] test4]# Ls-alTotal 312drwxrwxr-x 2 root root 4096 11-13 05:50.Drwxr-xr-x 5 root root 4096 11-22 06:58..-rw-r--r--1 root root 302108 11-12 22:54 log2012.log-rw-r--r--1 root root 11-12 22:54 Log2013.log-rw-r--r--1 root root 0 11-12 22:54 log2014.log[Email protected] test4]# CD.[Email protected] test]# chmod-r u+x test4[Email protected] test]# CD test4[Email protected] test4]# Ls-alTotal 312drwxrwxr-x 2 root root 4096 11-13 05:50.Drwxr-xr-x 5 root root 4

Linux Command Execution monitoring and software installation, linux Command Software InstallationMonitoring command Run time command $ Time sleep 5 real 0m5. 003 s # End Time of the program, including the time slice occupied by ot