Shell

The above summary of the shell, all reproduced to the following blog:Linux Shell Common Skills (i)Http://www.cnblogs.com/stephen-liu74/archive/2011/11/10/2240461.htmlI. Special documents:/dev/null and/dev/ttyTwo. Simple command trackingThree.

Transferred from: http://www.linuxidc.com/Linux/2011-09/42929.htmWhen using the shell under Linux, for convenience, an array is occasionally used. The way the array is declared is: array= (element1 element2 element3 .... elementn) That

Linux shell commandWhat is a shell?The Shell is the interface that connects the operating system kernel to the user.The terminal is the representation of the shell.What is Shell programming?The Shell scripting language, together with the Linux

Before the HTML "TARGET=_BLANK>XP using the Control Panel CPL file left the back door, and then with the. cpl file Plus account technology, LCX really very powerfulToday, we studied the user Control Panel file nusrmgr.cpl, found that the call is

I have heard that dreamhost only supports shell, but it has never been used. It is mainly because it is not very necessary before and has not uploaded many things. Recently, due to the fact that a large number of files have to be uploaded, the

Tag: style blog HTTP color file 2014 Recently, when learning about Jenkins, there is a problem: the number of subdirectories under the Linux ext3 system directory cannot exceed 31998 (refer to: http://www.xshell.net/linux/1267.html), but Jenkins

Background:Access to Site Resources outside China is sometimes very slow. an occasional download is certainly tolerable. It is a wise decision to build an image site for multiple use or internal use by a small team.This section uses the yum source

1. ftp automatically logs in to batch download files. Copy codeThe Code is as follows: ##### migrate/home/data from the ftp server to the local/home/databackup #### #! /Bin/bash Ftp-n Open 192.168.1.171 User guest

Code 1: Copy codeThe Code is as follows :#! /Bin/bash # Network card Traffic Statistics # Link: www.jb51.net # Date: 2013/2/26 N = 10 DateRm-rf/tmp/ifconfig_logWhile ($ n> = 0 ))DoN = $ ($ n-1 ));Date>/tmp/ifconfig_logIfconfig

Copy codeThe Code is as follows :#! /Bin/bash Declare gw = 'route-n | grep-e' ^ 0.0.0.0'' Declare gwname = 'echo $ gw | grep-oe '\ w * $'' Declare gwip = 'echo $ gw | grep-oe '[0-9] \ {2, 3 \}\. [0-9] \ {1, 3 \}\. [0-9] \ {1, 3 \}\. [0-9] \ {1, 3 \}'

In linux, the/proc/$ PID/status file provides the usage of the Process resources (memory, stack, semaphore, sub-parent process, although linux provides a lot of memory viewing commands, they all look at the overall usage and cannot view the memory

Monitordisk. sh: Copy codeThe Code is as follows :#! /Bin/bash # Updated: PM By: leif (liangliwen@163.com) EMAIL =/usr/local/bin/email /Bin/df-h>/tmp/df.txt USE = 'df-H | grep-o [0-9] * % | grep-o '[0-9] \ +'' For I in $ USEDoIf ($ I> 95 ))Then$

Day 3: Select Conditions Outline Application Instance Analysis Conditional Test If... Else... Fi Case... In... Esac Implementation menu: After the script is executed Press 1 to display the current time Press 2 to display the CPU load Press 3 to

#! /Bin/bash# Name: remove_one.sh# Purpose: Find and delete duplicate files. Only one sample is retained for each file.# Sort and output files by sizeLs-lS | awk 'in in {# Obtain the total number of the first row and discard it. Read the next

Background any program running will inevitably generate a lot of logs, of which error logs need to be the most concerned. In some cases, the error log and the normal log are separated, but our system does not. What's more troublesome is that one log

Write SHELL scripts to monitor hosts 1. Run the vi command to create a script file sysmon. sh in the/root directory: The content is as follows: #! /Bin/bash Dug = $ (df-h | grep "/$" | awk '{print $4}' | awk-F % '{print $1 }') Cug = $ (expr 100-$

Question 1: Get sequential numbers from 1 to 9Shell Method 1: For I in 'seq 1 9'; do echo $ I; doneSimilar to seq 1 9 or seq 9 123456789 Shell Method 2: For (I = 1; I Similar to for I in {1 .. 9}; do echo $ I; done 123456789 Python method

Because the application of shell is not too long and has never touched on arrays in actual projects, we need to convert something like a = 1, 2, 4, and so on today. We used awk to retrieve them separately. So today I want to see if there is a better

When writing a shell script, changing the display color of the shell not only changes the user experience of the shell terminal, but also more practical is to distinguish normal output by changing the color of the display content, warning, error,

Shell Program Design (2) Shell syntax Variables In shell, variables do not need to be declared before they are used. By default, variables are stored as strings, even if they are assigned numerical values. Shell and some tool programs convert