Shell

The ADB Shell AM command is available on the cmd command line via commands to start activity,boradcast,service, etc., and can be referenced in the following attachments.For example, in the CMD serial port we send the broadcast, the broadcast action

Bored to see a face test, requires the shell script to create 100 users, named: student001...student100:#!/bin/bashfor num in ' seq-w ' Do/usr/sbin/useradd student$num echo ' Password ' |passwd--stdin student$nu MdoneAlso, ask for an account

Recently in the study shell, eldest brother let write a read system configuration information script as practice and work acceptance, I wrote such a script, read the operating system, kernel, network card, CPU, memory, disk and other information,

When you use Hadoop or deploy Hadoop, you often encounter situations where you want to copy files to other machines, but if the individual writes, it happens that the cluster is large and exhausting, and now uses an awk to write shell scripts that

HBase Shell Common Commands:Name-------command expression creates table-------create ' table name ', ' column name 1 ', ' Column Name 2 ', ' Column name n ' Add record-------put ' table name ', ' Row name ', ' Column name: ', ' value ' view record---

Filter email and website address in fileFilter mailboxes (only filter text is displayed):#egrep-O ' [a-za-z0-9.] [Email protected] [A-za-z0-9.] +\. [A-za-z] {2,3} ' file.txt[Email protected][Email protected]Filter website Address:#egrep-O '

Overview:The process class is an abstract class (all methods are abstract) and encapsulates a process (that is, an executing program).The process class provides a way to perform input from the process, perform output to the process, wait for the

the previous article provided some basic overview of Linux. This time we started to play the basis of command-line operation, and then rely on some graphical operation to improve our efficiency.Since we want to learn the Linux operating system, we

Previously wrote an article, with Shell timed purge expired files "Shell timed purge expired files", its practical is simple find commandAfter the colleague adopted, he debug the script, there are a few errors, I did the collation:1.find:paths must

For List formFor variable in {list}do statementdonefor var in 1 2 3 4do echo $vardonefor var in {1..4}do echo $vardonefor v Ar in {start.. End.. Step}do statementdonefor i in {1..100..2}do echo $idonefor file in $ (LS) does echo

1. String Qiatouquwei #,%For example:X=aabbaarealwwvvwwecho "${x%w*w}"Aabbaarealwwvvecho "${x%%w*w}"Aabbaarealecho "${x# #a *a}"Lwwvvwwecho "${x#a*a}"BbaarealwwvvwwWhere, # means pinch the head, because on the keyboard # on the left.Where,% is said

1: Errors in redirection and output are directed to the same file in the following way:such as:ls + 1>list.txt 2>&1 or ls + &>list.txtInstead of ls + 2>&1 list.txt2:-exec {} \; This is a command format, not a newline, there is a space in the middle

(1) If statement[Email protected]:/mnt/shared/shellbox/shellif# cat shellif.sh #!/bin/bash# judgment string if ["$" = "Hello"]then echo "\$1= $ "fi# judgment number, if () mode can only be used under bash, not under sh if (>) then echo"

Core idea: First determine an element interval number gap, and then the sequence of participating in the order of this interval from the beginning of the 1th element into a number of sub-sequences, that is, all positions spaced gap is considered as

Linux shell programming process control, linuxshell If statement: Test is used in the past. Example 1: When the hard disk exceeds 80%, notify the Administrator Example 2: Automatically Restart Apache when it is disabled Example 3:

Shell Study Notes (2) Regular Expressions in shell and shell Regular ExpressionsThe difference between a wildcard and a regular expression is the native syntax supported by bash. A regular expression is a way to process strings. A regular expression

The Shell script calls a specified function through passing parameters. When writing some functional scripts, we usually put functions with similar operations or similar parameters in the same shell script, which is convenient to manage, easy to

The Shell script calls the specified function by passing parameters. The shell script When writing some functional scripts, we usually put functions with similar operations or similar parameters in the same shell script, which is convenient to

[Linux] shell, the application of anti-quotation marks ('), linuxshellThe quotation mark (') is located at the top of the Tab key of the keyboard and the left side of the key 1. Note the difference between it and the single quotation mark (') on the

Linux monitors the running shell scripts of a process and linux monitors shell scripts. This script scans and monitors the process with the specified process name at intervals of 2. Once the process does not exist, it restarts. #! /Bin/sh A =