Shell

1, view the host network card traffic The code is as follows Copy Code #!/bin/bash#!/bin/bash#network#Mike. XuWhile:; TodoTime= ' Date +%m '-"%d" "%k": "%m"day= ' Date +%m '-'%d 'Rx_before= ' ifconfig eth0|sed-n "8"

File transfer The biggest problem with the CMD shell that is getting the overflow is how to upload the file. Due to the worm's popularity, the 139 or 445 ports required to connect ipc$ are routed and blocked. Coupled with the WinXP system to enhance

arrays, as a special kind of data structure, have a place in any programming language, and of course bash shells are no exception. This article makes a small summary of the shell array.Here we only discuss the case of one-dimensional arrays, about

The shell is a command interpreter that provides interaction between the user and the machineSupports specific syntax, logical judgments, loopsEach user can have their own specific shellCentos7 default shell is bashand Zsh and Ksh.Yum List|grep

The MongoDB data types are as follows: Type corresponding numbers Alias Description Double1 1 Double String 2 String Object 3 Object

LInux's Shell has a set of its own flow control statements, including conditional statements (IF), loop statements (For,while), which have a great effect on our usual scripting and command input, which will certainly help us a lot. I. IFIf is a

# Author: The Adventures of Tintin (Jacob)# The script uses the Guestmount tool, Centos7.2 installed libguestfs-tools-c can get Guestmount tool# The script modifies the virtual machine's IP address information without logging on to the virtual

The Linux system processes each object as a file. This includes the input and output processes. Linux uses file descriptors to identify each file object. A file descriptor is a non-negative integer that uniquely identifies the open file in the

In the loop, sometimes you need to force out of the loop when the loop end condition is not reached, like most programming languages, the shell also uses break and continue to jump out of the loop.Break commandThe break command allows you to jump

Recently, the server has been frequently attacked by DDoS, so it can only be solved temporarily by IP source. IP is not the source of changeable, light by hand to add is simply a nightmare, think of a method, with the shell to do.Relatively simple,

The latest when looking at a shell data, according to the textbook, but the following error, can not runAs follows, the simple script:#!/bin/bashcat | while Read Line do Echo $line Done awk'{print $}')The following error occurred while

Blog Category: Linux Linuxcrontabpermissionetc/profile Environment variablesOne, we often encounter the execution of a command under the shell can be successful, such as executing a Java program:Java-jar/home/opscoder/topo-audit.jar,

Shell backgroundThe first important shell was the Bourne shell (so named to commemorate the Shell's inventor Steven Bourne), when the first popular Unix version 7 was released in 1979, and began to useBourne Shell. Bourne Shell's main file name is

Bash working features:1. Support Command history, command completion2. Support Pipeline, redirect3. Support Command aliases4. Support for command line editing5. Support Command line deployment6. Support File name wildcard7. Support for using

The script on the book compares the more useful scripts for more recordsA better way to check if the command-line arguments are numberse_wrongargs=85 # non-numerical argument (Bad argument format). The #42 # case "$" in43 # "") lines=50; # *[!0-9]*)

Defining shell functions (define function)Grammar: [ function ] funname [()]{ action; [return int;]}说明：1. 可以带function fun() 定义，也可以直接fun() 定义,不带任何参数。2. 参数返回，可以显示加：return 返回，如果不加，将以最后一条命令运行结果，作为返回值。 return后跟数值n(0-255)。 Example (test_fun.sh): #!/

1. IntruductionExitmakeShell(script) to exit with a specified status value, Execute without parametersExitwhen, Shellor the script exits with the status value of the last execution command. Shellbefore exiting, Trapcan huntEXITsignal. 0indicates

Core:------again---again!How ops people learn shell scriptingOld boy Linux early graduate students talk about how to learn shell programming skillsAfter graduating from school, he served as operations manager for a nearly thousand company. Currently

[[Email protected] shell] # Cat zabbix. Sh #! /Bin/bash Set-x Host = 'hostname' Dir =/root Service iptables stop AZ () { Groupadd zabbix Useradd zabbix-G zabbix-S/sbin/nologin Tar-zxvf $ DIR/zabbix-1.8.5.tar.gz CD zabbix-1.8.5 ./Configure -- prefix

The shell script deletes the folder N days ago. The date commands on linux and mac are different, Background:Every day you build things and put them in different folders by date. For example, today's construction is put in, tomorrow's will be put