Shell

Follow the Mongdb authoritative guide when using version 3.4. 1 version of MongoDB, which uses the Batchinsert function to BULK Insert the students collection Db.students.batchInsert ([{"ClassID": 1, "age": +, "name": "Kobe"}, {"ClassID": 1, "Age":

the general format of the shell and other interpreted languages?#!/bin/bash #shell脚本的首行格式 #!/usr/bin/python #python脚本的格式 #!/usr/bin/perl #perl脚本的格式 #Description: # "#" at the beginning of a single well font is an annotation, after which content is

Compare days with 2 dates1. Script referenceScript 1: #!/bin/bash#格式化过期日期，格式化过期日期完整时间以当前时间作为参考！expday="2018-04-11 `date +%T`"echo "Expire day is $expday"#当前日期时间格式为stamp时间戳todays=`date +%s`echo "Today is $(date +"%F %T")"#以下2种方式做时间的四则运算，分别使用

Case one:"LVS Client Node" Development LVS Client Set VIP and Admin script to suppress ARPScript content:#!/bin/bash############################################################### file name: lvs_ client.sh# version: v1.0# author: da ya# organization:

If condition test statement If-then-fiThe IF condition test statement runs the command after the if (judgment).If the exit status code for this command is 0, the command in the then section will be executed.If the exit status code for the

#!/bin/shmaildir=/maildata/mailbox/gxm.cn/0olddir=/home/mailboxnewdir=/maildata/mailboxecho  ""  >/ root/lostmailidecho  ""  >/root/lostmailidokfor mailid in  "cat /usr/local/ Kkmail/log/app/postman.log.2018-03-06 | awk -f " "   ' {print $4} '

Shell Color and Flicker control Sometimes custom output is required under the shell, such as adding color to the output, highlighting it, or adding flicker.Then these color codes or control codes are relatively bad to remember. At this

20.1 Shell Script IntroductionWhat is a shell? Shell is a scripting language You can use logical judgments, loops, and other syntax Functions can be custom-defined The shell is a collection of system commands Shell scripts

Use sudo to perform the PIN report error:sudo: myshell.sh: command not foundCause: This happens because the script you are trying to execute requires the correct permissionsWorkaround: Execute sudo chmod a+x myshell.sh and then execute the script at

First, Shell basic applicationTarget:This case requires familiarity with the characteristics of the Linux shell environment, mainly practicing the following actions:1> switching the user's shell environment2> Practice Command History, command

PHP itself does not have a timer function,PHP can not be multithreaded. PHP's scheduled task function must be combined with other tools to achieve Linux the script implementationHow to use :crontab Filecrontab [-u user ] [-u user ] {-l |-r |-e}

2017 the latest enterprise face Test shell (i)**********************************************Enterprise Shell face question 1: Batch generate random character file name case ***********************************************Use the For loop to bulk

Shell Special Symbols* Any of any characters[[email protected] ~]# ls *.txt1.txt 23.txt 2.txt David.txt? Any one character[email protected] ~]# ls?. Txt1.txt 2.txt# comment Characters[[email protected] ~]# #echo ' OK '\ de-Semantic characters[Email

First, Shell introductionThe role of the shell is to interpret the command that executes the user, and the user enters a command that the shell interprets as an "interactive" line. Another way to execute a command is "batch", where the user writes a

Since HDFs is a distributed file system for accessing data, the operation of HDFs is the basic operation of the file system, such as file creation, modification, deletion, modification permissions, folder creation, deletion, renaming, etc. The

There are three types of quotes in the Linux shell, double quotation marks (""), single quotation marks (' '), and anti-quotation marks (').The double quotation marks replace the $, ', ', and \ that appear in the string, the single quotation marks

This is my Sina blog, with all the shells I wroteI wrote a lot of my own practice in the Sina blog Shell, I am going to write in 51, above is a hyperlink.(a) accept an input and replace the first letter of the input string.For example[Email

Because the company Ali server changes several times, manually deployed several times Fastdfs+nginx, so think of the automated deployment, the following is the script content, because just want to implement the function, has not completed the

Functions in the shell The function is to organize a piece of code into a small unit, and give the small unit a name, when the code is used to call the name of the small unit directly. 格式: function f_name() { ?? ?? ?? ?? ?? ?? ?

Shell scripts implement scp upload (mutual CT interaction) and ftp upload, scpexpect There are two requirements recently. One is to copy files from each server to a server with a large disk on a regular basis every day, and copy the files on each