Shell

It is for entertainment only and is not responsible for the result of misoperations. 1. Remote copyRoot@192.168.1.38:/f/u/C/k.txt.Root@192.168.1.38 SCP-r-p1234:/beauty. 2. Force Overwrite\ CP-r/data/data1 3. synchronous copy of

1. Exec Read lineRushid = $ lineExec is a pipeline command, which is generally not used separately.Read from the CSV file and assign each line to lineRead is used to accept keyboard input in shell. Line is a variable that accepts output parameters.

By default, the Ubuntu shell is installed with Dash instead of bash.Run the following command to view the sh details and confirm the corresponding ShellProgramWhich is:$ LS-Al/bin/sh Dash is lighter and faster than bash. Bash is more commonly

JudgeProgramWhether it exists, and start its #! /Bin/sh Echo-e "\ 033 [32 m redmine starting \ 033 [0 m"Redmine-2.1.4/CD/u02/Ruby script/rails server webrick-e production-dVar = $ (PS-Ef | grep Ruby | grep-V grep | WC-l)If [$ var-GT 0]ThenEcho-e "\

The find command is used for searching. It has powerful functions in the following format: Find pathname-options [-print-Exec-OK...] Pathname: directory path searched by the find command. For example, use "." To represent the current

As you know, you can use shell to output information to the screen. However, if the output content is too large and redundant, it is not easy for us to analyze and extract the screen information we want, so how can I write shell output into a file?

Today, we found that gitbash can be directly opened in shell. gitbash provides some useful Linux-style commands. The most important thing is that you do not need to open another gitbash terminal to manipulate git when using Emacs. In ~ The

1. Arithmetic Extension #! /Bin/bashx = 0 while ["$ X"-ne 10]; doecho $ xx = $ ($ x + 1) doneexit 0 2. Parameter Extension #! /Bin/bashfor I in 1 2; domkdir $ {I} _ tmpdoneexit 0 3. Processing Parameters #! /Bin/bashunset fooecho $ {FOO:-bar}

Below is a simple Linux ShellCodeThe function is used to find the current directory and all its directories which contain the four characters "html" and print the file name, at first glance, there should be no problem with this code, but there are

######################################## ######################### ######################################## ######################### Ftp_download_file (){ EchoEcho begin: Download $1: $2...Echo Sleep 0 FTP-I-n Open $1User administratorBinMget

@ Rigorous use of set @ Set-eux -E. If the command returns a non-zero value, exit immediately. -U when the execution parameter is included, the unset variable is used as the error handling (if the extension attempt appears in the unset variable, the

Ls-l dir1 | WC-L. 1. While condition; do done // () [] Test2. Until is the same as above. It is executed only when the condition is not true.3. /Dev/null: Unix black hole. Used to clear the file CAT/dev/null> XX find-name a.txt 2>/dev/null4. Note:

Is there the same command as NBTSTAT in Linux! View other information through IP: Host Name, Mac, etc. You can use nmblookup-a ip address. You can also use nbtscan. ARP command: ARP iPad. Local or ARP 192.168.1.108 or ARP-A or ARP VI search string:

#! /Bin/sh # Filename: 2.sh B = 9 E = 15 Tmpb = $ B While [$ tmpb-Le $ E] Do Echo $ tmpb # Tmpb = 'expr $ tmpb + 1' // OK Tmpb = $ (expr $ tmpb + 1) Done After the script is executed, the output result is: 9101112131415   Note: The

To determine whether the variables in a script are empty, I wrote a shell script like this: #! /Bin/sh # Filename: Test. Sh Para1 = If [! -N $ para1]; then Echo "is null" Else Echo "not null" Fi Then run the Script: test. sh uses

Shell file operation functionsShfileoperationFunction:1. Copy one or more files2. delete one or more3. Rename the file4. Move one or more files The same WIN32API function is:Copyfile (), deletefile (), movefile ()Movefile can be renamed!Win32 API

Special characters in Linux Shell 1. braces: Usage 1: wildcard Extension Eg: ls my _ {finger, toe} s This command is equivalent to a combination of the following commands: Ls my_fingers my_toes For example: mkdir {usera, userb, userc}-{home, bin,

Summary of Linux Shell shortcut operations (including shortcut keys and efficient operations ): CTRL +: Start with the command line CTRL + E: End of the command line CTRL + L: Clear screen, equivalent to the clear command CTRL + u: Cut the content

One Separator1. Single separator (for example, extract the 11:22:33 string 11 22 33)Echo 11:22:33 | awk 'in in {FS = ":" };{ Print $1 "" $2 "" $3 ;};' 2. Define multiple delimiters (for example, extract string 11 22 33 44 from string 33 & 44)Echo '11

Reprint: http://www.51testing.com /? Uid-225738-action-viewspace-itemid-218002   ShellProcessing StringMethod (for future reference) 1. Construct a string Direct Construction Str_zero = Hello Str_first = "I Am a string" Str_second =