Shell

Bash is one of the most commonly used shells of the unix/linux operating system, and it is very flexible, and is exceptionally powerful with awk and C + +.The following uses a test script to illustrate how to use bash debuggingtest.sh[Plain]View

Meaningless script, big God do not spray/[[email protected] desktop]# vim oraclesh.sh #!/bin/bashclear# function Test_parameter1 () {' echo  ' su - oracle -c  ' Sqlplus /nolog '  name          type  value------------------------------------ ---------

1. Number of rows, words, and characters of the statistics file1) Number of lines:Wc-l fileCat File | Wc-l2) Number of wordsWc-w fileCat File | Wc-w3) Statistics of charactersWc-c fileCat File | Wc-c4) When not with any parameters, all three are

1. What is BashIn Windows systems, the most common use of a graphical interface is to perform performance. Sometimes we also use DOS commands to execute commands, where DOS is a text-mode interface, and we have some DOS instructions that can be done

String interception of Linux is useful. There are eight ways.Suppose there is a variable var=http://www.aaa.com/123.htm.1. # Intercept, delete the left character, leave the right character.The code looks like this: Echo ${var#*//}where Var is the

The first time to write a blog, add some nonsense, learning Linux for a period of time, with the study of the deep discovery of their lack of learning system, especially encountered some inexplicable problems, I only have a variety of Baidu, good

When using Biber I usually follow the order of Pdflatex→biber→pdflatex→pdflatex, which are not an available option of Many IDEs.#! /bin/bash# # author:luglio# Date: -/ A/ -# Version:0.1.1# # prerequisites# LaTeX suite with Biber, sam2p# settings#

1. Use the shell or Python to write a square (oldboy4.sh) to receive the number entered by the user.For example: with the + number implementation[Email protected]:~/script$ vim Oldboy_squarel.SH[email protected]:~/script$./oldboy_squarel.SHPlease

One, single branch if statement 1. Syntax formatif Then program fi or if [conditional judgment] then program fiNote: There must be a space between the brackets and the conditional judgments2. Example 1: Determine if the logged on user

Want to see the Linux traffic situation in real time, and do not want to go to the third-party tools, you can directly write footsteps run!System: CentOS 6.5Principle: Obtain the flow from the/proc/net/dev, and then by the conversion and divided by

Tcshell, CshellConfiguration fileGlobal configuration file/ETC/CSH.CSHRCPersonal Profile ~/.CSHRC or ~/.TCSHRCReference:1. Configure your csh/tcsh, https://wiki.freebsdchina.org/howto/c/config_your_csh2. My. CSHRC Common Settings

#!/bin/bash#auto Install LAMP#by Csy 2015-11-07#Httpd Define PATH

Welcome to: Ruchunli's work notes, learning is a faith that allows time to test the strength of persistence. Kafka The main shell scripts are[[Email protected] kafka0.8.2.1]$ ll Total  80-rwxr-xr-x 1 hadoop hadoop 

Variable definition and use$var =value------don't add spaces around the equals sign$echo $var--$var to reference a variable$age = 20--Variable assignment$echo "She is $age"--reference variable in string, ${age}, can distinguish variable

Based on some articles on the reference Web, a system-initialized shell script is summarized.#!/bin/bashcat /dev/nullyum-y install ntpdate &>/dev/ Nullntpdate 0.centos.pool.ntp.org &>/dev/nullhwclock-wformat###########################################

when writing loops in the Linux Shell , it is often necessary to use the variable's self-increment, now summarize the method of increment of integer variable.As far as I know, in bash, there are currently five ways to do this:1. i= ' expr $i + 1 ';2.

Bash Programming: Exercises1. Write a script: If a path does not exist, it is created as a directory, otherwise it is present, and the content type is displayed#!/bin/bash#baseurl=/var/tmp/testdirif [-e $baseurl]; Thenecho "file is no exists."

I. Case ORDERCase variable invalue1)Command (s);;value2)Command (s);;*)Command (s);;EsacIf the case variable is not matched, the program executes *) after the statement.Shell wildcard and vertical bar (|) are allowed as the OR operator in case

This is the night of my own leisure. Learning Solr suddenly saw the definition of the array, want to forward a more detailed array operation.1. Array definitionsA= (1 2 3 4 5)Echo $aA pair of parentheses indicates an array, and the elements of the

Command: SortOption:-t:-kn Specifies that the order is sorted according to a segment here N represents a number, the range specifies n,n. range from N to n-N in numerical order-R Reverse Order-U go to repeat sort-un numbers are ordered and repeated,