learn bash scripting

;!string: The most recent command in the command history that starts with a specified string!$: References the last parameter of the previous command;Esc.ALT +.Command completion, PATH completionCommand completion: Search the PATH environment variable specified by each of the paths with the string we give the beginning of the executable file, if the extra one, two times tab, you can give a list; otherwise it will be directly complete;Path completion: Search for each filename under the starting p

results of "mail.jpg tux.jpg".quotation marks (single and double quotation marks) prevent this wildcard extension: #!/bin/shecho "*.jpg" Echo ' *.jpg ' This will print "*.jpg" two times.Single quotes are more restrictive. It prevents any variable expansion. Double quotes prevent wildcard expansion but allow variable expansion. #!/bin/shecho $SHELLecho "$SHELL" Echo ' $SHELL ' The result of the operation is: /bin/bash/bin/

other software.Many of the commands used on Linux systems, such as man, chmod, Chown, VI, are all standalone applications, but we can manipulate them through the shell (which is the command-line mode), allowing these applications to invoke the kernel to run the required work. As long as the interface that can manipulate the application becomes the shell. The narrow shell refers to the command-line aspect of the software, including bash and so on.The

big side.Listen to the old boy teacher and some experts said that the best way to learn early is to knock and break the problem of practice.The highest programming self-perception is:Problem analysis decomposition is fast and complete.Completeness: is to judge the various possibilities.High efficiency, high performance, 1+2+3...+100 = (1+100) * (100/2)/2Old boy Shell advanced programming combat Video 52 freeHttp://edu.51cto.com/course/course_id-963.h

Basics of Linux Shell scripting here we first talk about the shell of the basic syntax, the beginning, comments, variables and environment variables, to do a basic introduction, although not related to specific things, but lay the foundation is to learn easily after the premise. 1. Linux Scripting Basics Basic Introduction to 1.1 grammar 1.1.1 Opening The progra

Perhaps the content of this article is a bit dull, but I would like to say that if you want to learn more about how the game engine is dealing with animation breaks or footage and the player's manipulated characters to animate, then this is a good article (of course I just translated it) animated script Animation Scripting The Unity ' s animation system allows you to create a nice animated skinning charac

when locating a rect transform. first determine whether it has or should have any stretching behavior. Anchormin and anchormax attributes do not have the same tensile behavior. For non-stretched rect transform, it is easiest to set this position by setting the anchoredposition and sizedelta attributes. The position of the anchoredposition specified by the anchoredposition and anchors. The same size of sizedelta is sometimes not stretched. For stretched rect transform, it can be the location o

(18) unity4.6 learn Ugui Chinese Document ------- tips-Creating UI elements from scripting, ugui-creating Hello everyone, I am Sun Guangdong. Reprinted please indicate the source: http://write.blog.csdn.net/postedit/38922399 More comprehensive content please see my game pretty cool address: http://www.unitymanual.com/forum.php? Mod = guide view = my4. CreatingUI elements from

Linux Scripting Learning D: Delete rows that match the criteria Sed ' 1,2d '/etc/fstab delete 1, 2 lines, show other rows P: The line that displays the print fit condition Sed '/^\//p '/etc/fstab matches the display, plus the original, there will be 2 duplicateSed-n '/^\//p/etc/fstab displays the line that matches the print A: Add/string after the specified line Sed '/^\//a \ #hello world '/etc/fstab \ #

Command aliasesAlias aliases = ' 'Aliases defined in the shell are valid only for the current shell life cycle, and the valid range of aliases is only the current shell processTo permanently use aliases in the shell, you need to change the configuration fileAlias displays all aliases that can now be used if no parameters are added laterCommand substitution$ (command), anti-quoteFile name wildcard globbing*: can match any character of any length？ : can match any character (only one character)"":

Display and setting of variablesThe display of variables:echo $[variable name]To modify a variable name:Use the equals sign "="Variable names can only consist of alphanumeric characters and can only start with a letter.To cancel a variable:unset variable Nameenvironment variable function:Env view environment variables and descriptionsRandom number variablesSet view all variables (including environment variables)If you want to use your own defined environment variables in a child process, use the

Selenium and QTP are functional automated tests, LoadRunner and JMeter are automated tests of performance Selenium requires a higher code capacity, suitable for PYTHON,QTP general use of Vbs,loadrunner General C, but now also can be used in Java and other languages. Now the most powerful tool for functional automation is QTP, but the trend of selenium is growing, and it is recommended to use this tool What's the difference between Selenuim,qtp,loadrunner,jmeter, where you want to

1, #!/bin/shThe first line tells the operating system that the interpreter for this script is/bin/sh this executable file2. While loop:#!/bin/shSleep 1; echo "User"; \Sleep 1; echo "Password"; \While true; Do \echo "Output"Sleep 1; \Done3, the shell script realizes the automatic input of Telnet, implements with the pipeline, the last while loop is used to give the last command full execution time(Sleep 1; echo "user"; \Sleep 1; echo "Password"; \Sleep 1; echo "Cd/usr/local"; \Sleep 1; echo "./te