Shell

Back up your Web program#!/bin/bash/bin/tar czf/mnt/backup_website/web_$ (date +%y%m%d_%h%m%s). Gz. tar /mnt/wwwroot/web/mnt/backup_websitefind . -mtime +1"*20[1-9][3-9]*"xargsrm - 0Backing Up the

[Author]: KwuBased on the Sparksql call shell script run Sql,sparksql provides an option similar to-e,-F,-I in Hive1. Timed Call Script#!/bin/sh # Upload logs to HDFs yesterday= ' date--date= ' 1 days ago ' +%y%m%d

When we use the shell to process files, we often need to remove or add newline characters, the name of the problem is how to quickly replace it?We have such a file[email protected] working]# cat

Tag:expr   bsp    Command    not   csharp    other   filename    line    awk    Shell Learning notemain= "/usr/local/" # Variable uppercase status= "$MAIN/status" # USD multibyte string is a reference variable value, while USD multibyte number

#!/bin/bashecho "Hello world!"1. As an executable programSave the above code as test.sh and CD to the appropriate directory:chmod u+./test. #使脚本具有执行权限 ./test. #执行脚本2. As an interpreter parameterThis works by running the interpreter directly, whose

1#! /bin/Bash2 3icms_path=$ (CD $ (dirname$0);pwd)4deploy_path=$ (CD $ (dirname$ICMS _path);pwd)5jar_file= $DEPLOY _path'/dailydata-1.0-snapshot.jar'6ini_file= $DEPLOY _path'/cnedmp_etl.ini'7log_file= $DEPLOY _path'/shellrun.log'8coding='GB2312'9

#!bin/bashLog_dir=/var/logRoot_uid=0if[' $UID '-ne ' $ROOT _uid ']ThenEcho ' must is root to run this srcripts 'Exit 1FiCD $Log_dir | | {echo "Cannot change Necessarydirectroy" >&2Exit 1}Cat/dev/null >messages&&Echo ' log is cleaned up. 'Exit 0 #返回0

Edit the. bash_profile file under your own user#. Bash_profile#exportPs1= "\n\e[1;32m[\e[0;31m\u\e[0;[ Email protected]\e[0;31m\h\e[1;32m]\e[1;32m[\e[0;34m\w\e[1;32m]$ "# Get the aliases and functionsIf [-f ~/.BASHRC]; Then. ~/.bashrcFi# User

The shell script in Crontab writes the top information to the file:Note:1, Top-n 1 for Execution 1 exit (default top is not exited),-D 1 for 1 seconds2, crontab need to add/bin/bash# CRONTAB-E*/5 * * * */bin/bash/usr/local/bin/top.sh# VI

1. Shell Variable TypeThe shell is a dynamic type language (not using explicit data declarations) and weakly typed languages (variable type operations vary according to requirements). The variables in the shell are non-typed (all string types), but

CutThe Cut command extracts text columns from a text file or text stream.Cut grammar[[email protected] ~]# cut-d ' The delimiter character '-f fields The PATH variable is as follows[Email protected] ~]# echo

#!/bin/bash################################################################################# Filename:upgrade_ Project.SH# Summary: Project Upgrade Script # LICENSE:GPL # Version:1.0# Author:jet bi# Email:1207501666@qq. com# Date: ./ ,/ ,# Note:

1. Type of shell[Email protected] ~]# ls-l/bin/*sh-rwxr-xr-x. 1 root root 938832 Jul 2013/bin/bashlrwxrwxrwx. 1 root root 4 Oct 2014/bin/csh-tcsh-rwxr-xr-x. 1 root root 109672 Oct 2012/bin/dashlrwxrwxrwx. 1 root root 4 Oct 2014/bin/sh-bash-rwxr-xr-x.

We can pass parameters to the script when executing the Shell script, and the format of the parameters obtained in the script is:$n. n represents a number, 1 is the first argument to execute the script, 2 is the second argument to execute the script,

One, branch control statements1. If: Fi conditionif condition; ThenActionFi2. If: else.. Fi conditionIf Condition;thenActionElseActionFi3. If: else if: else.. Fi conditionIf Condition;thenActionelse if Condition;thenActionElseActionFiNote: If and

Test script as follows, I mainly want to test $0,$1,$2, $n, [email protected],$* default is what?#!/bin/shEcho ' $1= ' $Echo ' $2= ' $Echo ' [email protected]= ' [email protected]Echo ' $*= ' $*Echo ' $0= 'Test:# sh var.sh 1 2$1=1$2=2[Email

Problem: Now there are two scripts, I want to match the contents of File1 by File2[email protected] home]# cat file13-1-1 potv=1,pota=0,potp=21-4-76 potv=1,pota=0,potp=12-1-2 potv=1,pota=1,potp= 13-1-4 potv=1,pota=1,potp=24-1-5 potv=1,pota=1,potp=27-

The specific HBase shell commands are shown in table 1.1-1 below:Below we will use the example of "A Student score table" to detail the commonly used HBase commands and how they are used.Here grad for the table is a column, course for the table is a

Meaning: Split the file by column according to the delimiterSyntax format: cut [options] ... [File] ...-C, --characters by character-F,--fields by column-D,--delimiter specifies delimiter, default is tab (\ t)Example: viewing file contents Cat

Linux Command-line edit shortcut: History displays a list of command histories ↑ (Ctrl+p) Displays the previous command ↓ (Ctrl+N) Displays the next command!num executes the command history list of the num-bar command!! Execute the last command!?