Shell

ADB Shell--helpDescription: More than 4.4 devices can be used to record video, without the need for root access, extremely convenient.E:\WORKSPACE\TAOPARKING\SCRIPT>ADB Shell Screenrecord--helpUsage:screenrecord [Options] Records The device ' s

MySQL table optimizer Brief:first, the analysis tablesecond, the inspection tablethird, optimize the tableiv. Table Data ImportFive, lock table operationfirst, the analysis table1.1. Command:ANALYZE [No_write_to_binlog | Local]table tbl_name [,

How do you invoke other shell scripts in the shell, or variables in other scripts, functions?method One:./subscript.SHmethod Two: source./subscript.SHNote:1. Two points, there are spaces, be careful.2. Two scripts are not in the same directory, use

8.1 First Test "/etc/vsftpd", "/etc/hosts" is the directory, and through the "$?" Variable view returns a status value to determine the test result.[Email protected] ~]# [-D/ETC/VSFTPD][[email protected] ~]# echo $?0[Email protected] ~]#

Strings are the most common and useful data types in shell programming (except numbers and strings, and no other type works well), strings can be in single quotes or double quotes, or without quotes. The difference between single and double quotes

As mentioned above, the shell is a scripting language, so there must be an interpreter to execute the scripts.The common shell scripting interpreters on Unix/linux include bash, sh, csh, Ksh, and so on, which are used to call them a shell. We often

!! Executes the previous command!cat executes the most recent command that starts with catCat!$ Execute command, above one command last parameter defines alias for parameter aliasUnalias aliases alias alias is valid only in the current environment,

During script execution, if there are some commands or paths that are long and need to be used repeatedly. Variables are used instead, which makes it easy to change and maintain.Read-t3-p "Please input a number:" NEcho $nRead is commonly used to

#!/bin/bash sum=0overall=0for dir in  ' find /proc/ -maxdepth 1 - type d -regex  "^/proc/[0-9]+" ' do    pid= ' echo  $DIR  | cut  -d / -f 3 '     progname= ' ps -p  $PID  -o comm - -no-headers '     for SWAP in  ' grep swap  $DIR/smaps 2>/dev/ null 

Writing one:#!/bin/bashWhile Read lineDoEcho $lineDone Two:#!/bin/bashCat file (file to be read) | While Read lineDoEcho $lineDoneThree:For line in ' cat file (files to be read) 'DoEcho $lineDoneThe above three kinds of writing are my excerpt from

Strings can be in single or double quotes, or without quotation marks.Single quotation marksstr='This isa string'Single-Quote String restrictions:1. Any character in a single quotation mark is output as is, and the variable in the single-quote

Case ... Esac is similar to the switch ... case statement in other languages, and is a multi-branch selection structure.Syntax for Case statements Case inch mode 1) Command1 command2 command3 ; Mode 2) Command1 command2 command3

Escape character#!/bin/Basha=tenecho"Value of A is $a \ n"Replace the escape character with the-e representation, which is not escaped by defaultCommand substitutionThe syntax for command substitution, note is the inverse quotation mark, not the

Before the directory installed on the OpenFire encountered this problem, and today again, you need to modify a folder under all subfolders and files of the three permissions: Read and write to the user, the administrator read and write, all read and

has been learning, but also has been forgotten, today with the help of this blog post, to record their own learning process some of the most basic things!1. For#!/bin/bashfor i in {1..10}do echo $idoneScan the active IP in the target network segment#

Write a small script to calculate how many days you have for your birthday.#!/bin/bash#  Enter your birthday date, calculate how many days you have birthday # 2015 July 20 read -p   "Please enter your birthday date (YYYYMMDD): "  date1date_d=$ (echo 

usage: seq [options] ... Mantissa or: seq [options] ... First number mantissa or: seq [options] ... The first number increment mantissa Prints the number to the mantissa starting with the specified increment from the first number.  

VIEditoris the standard for all UNIX and Linux systemsEditorThat it's powerful not inferior to any of the latest textEditor, here is simply a brief introduction to its usage and a small number of instructions. Because of any version of UNIX and

Special variable IFS in shell As I get used to the writing style of python, I often want to use bash to traverse the lines of a file and process the lines read. But in a strange situation, if my text is similar to this The first line.The second

The special variables IFS in shell, and the special variables IFS in shell As I get used to the writing style of python, I often want to use bash to traverse the lines of a file and process the lines read. But in a strange situation, if my text is