Shell

Sometimes the server vendors will make their own naming rules, such as some of Dell's server network card name may be the beginning of EM, such as EM1, and sometimes the beginning of the ETH, such as eth0, which let us get the network card command

AWK: useful Data processing toolsAwk is also a great data-processing tool! SED is often used for the processing of an entire row, and awk prefers to divide a row into several "columns" ( or, in other words, a column) to handle. Thus, awk is quite

1. grep====================== from Shell script Raiders ================================= Search from file or standard input. -E (E) (equivalent to egrep ) + "Regular expression" + files - o (Output matching text only, can be used

 Orderdeveloped under the Linux platform, we are often exposed to tasks of the nature of the work, and the processing methods are diversified. Now accumulate each case. Cleaning up the data log files for nearly 7 days is getting bigger, and we need

Shell Common Command Summary1 ls command: List filesLs-la list all files and folders in the current directoryLS A * lists all files starting with the A letter in the current directory Ls-l *.txt Lists all files with the suffix txt in the current

if condition judgment; ThenStatmentElseStatmentFiOrif condition judgment; ThenStatmentElifStatmentFiAnti-quote: Returns the execution result of the command to the variable.Set UserIDUserID = ' Id-u user1 'command to end a script prematurely: exit:

This is the weekend when you want to put out the shell, the results, Saturday overtime, plus the class and friends out to play, Sunday and stole a lazy, the results of the weekend did not do anything, with the development of the boss said the

The process controls the "if" expression if the condition is true then the following part is executed: if ...; Then....Elif ...; Then....Else....FiIn most cases, you can use test commands to test the condition. 　　For example, you can compare strings,

Remember when I first learned robotium, someone mentioned this method, at that time feel very good, temporarily do not want to contact (in fact, is more in-depth, difficult to quickly understand the fear of knowledge). Now to have to understand, but

First, homework (exercise) content:1. Describe the operation principle of shell program (can be attached with necessary graphic instructions);2, summarize all the knowledge points involved in shell programming (such as: variables, grammar, command

Key function Ctrl+d Keyboard input end or exit terminal Ctrl+s Tentative current program, pause and press any key to resume operation Ctrl+z Put the current program in the

1. Enter the HBase command line. /HBase Shell2. Basic commandsDisplay a list of tables in HBaseListQuerying all the information in the user table Scan' Users 'Clears the data Truncate in the user table ( equivalent to disable + drop + Create) '

A shell script was recently invoked with Crontab, and a Python script was invoked inside the shell scriptIn fact, it is to abandon Python to write a judgment trouble, using the shell to write a if to judge the case to run this Python script.But

First create the name myfuns# My script functionsfunctionAddem {Echo$[ $1+ $2 ]}functionMultem {Echo$[ $1* $3 ]}functionDivem {if[ $2-ne0 ] Then Echo$[ $1/ $2 ] Else Echo-1 fi}Then create a script with the name: test14. SH #!/bin/bash#

Here's how to take the shell with a little white. The first time I saw the word shell, and it was a task, to say Alexander.Background:http://www.tsqz888.com/xyfc/admin/Already have an account passwordFirst, backstage LoginSecond URL after add: admin/

In order to match the previous text, here first to organize a key how to deploy LNMP environment;In fact, small and medium-sized enterprises in the production environment is also very like to use such software packages, because after all, the source

1.if-then#!/bin/bashIf date if the command runs successfully (exit code 0), then the command in the then section is executedThenecho "Good"Fi2.if-then-else#!/bin/bashIf HunterThenecho "Good"Elseecho "bad" if statement in exit code not 0, execute

for((i =0; I 5; i++)) Do Echo "Current number is $i" DoneSERVICES="8000-3306" forXinch$SERVICES Do Echo$x Done forXincha b c Do Echo$x Done forIinch$* #$* is a string:"parameter 1 parameter 2 ..."form to save all parameters Do

has been misunderstood as the shell and command is the execution of remote commands, recently looked at the official help document only to find, made a low-level error, in fact, each module has its own application commonly used; Briefly explain the

Hill sort (Shell sort)#include using namespace Std;void print (int a[], int n, int i){Coutfor (int j= 0; j{COUT}cout}/* Direct insertion of the general form of the sort ** d Zoom out increment, if is direct insert sort, d=1 */void Shellinsertsort