read line

1. Conditional selection: If statement① Single Branchif judgment condition; then condition is true Branch code FI② Dual Branchif judgment condition; Then condition for true Branch code else condition for false Branch code FI③ Multi-Branchif judgment

The memory usage information of the system can be found in the virtual file system/proc/meminfo,So just open the/proc/meminfo file and read the information from it.#include #include #include #include #include #define Mem_part "/proc/meminfo"The

Process Control is the instruction that alters the order of the program's operation.4.1 If statement4.1.1 Single Branchan If condition expression; Then command fiExample:#!/bin/bashn=10if [$N-gt 5]; then echo yesfi# bash Test.shyes4.1.2 Dual

1. ShellFor a computer, its hardware is controlled by the kernel of the system, the user wants to control the computer, it must have the means to communicate with the system core. The shell is one of the means by which the user communicates with the

If you want to use SSH bulk login to the operation of other systems, we will use a circular way to deal with, then there is a huge pit, you have to be careful.Now you want to use a script to get the remote server side/root the following file:1 #

In the enterprise using PHP for development, inevitably always encountered the need to read/write Excel, encountered this demand, generally use the Phpexcel class library for development.Phpexcel now the latest version is 1.8.0, minimum required PHP5

① Random Read of file contents② read files in behavioral units, often used to read line-oriented format files③ read files in characters, commonly used for reading text, numbers and other types of files④ read files in bytes, commonly used for reading

Take a look at the wrong code first. Copy Code code as follows: #!/bin/bash For x in ' LS */.*/.* ' Cat $x |do Echo $x While Read line Todo C= ' echo $line |awk-f ' (' {print '} ' #echo $c i=$ ((i+ $c)) Done Echo Done Echo $i

Wrote a little shell instance of myself, though very small, but all the big programs are stacked up by small modules, programmers must understand a script writing, and I, will only work under Linux, so you can only write Linux shell script, oh, this

This article collects a bunch of shell scripting tricks, I said, I write a blog mainly to make some learning notes to facilitate their own review, so I will make such an article, there is nothing incomprehensible. About the origin of these

Recently encountered a project, the front end with the Apache HTTTPD (80 port), through the two-machine load balance forward to the back end of the two Tomcat processing (8081 and 8082 ports), now need to monitor the situation of these three ports,

Our business uses nginx, MySQL, PHP, and Tomcat, wrote an automated installation of these software scripts, although there are many similar automated installation scripts on the Web, but this is written by yourself, hereby mark, hoping to give

Code AUbuntu and CentOS Copy Code code as follows: Ubuntu: #!/bin/bash echo "IPADDR:" Read Line Echo $line Sed "s/address.*$/address=${line}/g"/etc/network/interfaces CentOS (not tested): #!/bin/bash echo "IPADDR:"

Iterating and traversing the lines, words, and characters in a file is a very common operation when you are working on a text file. Using a simple loop for iterations, plus a redirection from stdin or files, is the basic way to iterate through the

The so-called scope, can be simply understood as a can read, write scope (region), some of the JS experience may say: "JS does not block-level scope", JS in addition to global role outside, only functions can create scope. One benefit of scopes is

This paper mainly introduces the 4 methods of the shell reading files by line: While loop method, redirect method, pipeline method, file descriptor method. method 1:while The most efficient and commonly used method in the loop. The code is as

How to read a text file in MATLAB Today needs to do a MATLAB read TXT file, collected on the internet, found a few good, summed up, convenient for everyone (including me) use: The following function is to take the Filein in the line written in the

1. The transaction has acid four characteristics.1. atomicity (automicity): All statements in a transaction should be done: either wholly or not;2. Consistency (consisitency): Let the data remain logically "reasonable", such as: When a commodity out

-EQ equals -Ne is not equal -GT greater -Ge is greater than or equal -Lt is less -Le is less than or equal   SEQ 1 30 numbers from 1 to 30 Touch-mt2010030303.03 $ dir: Modify the directory time format STAT/tmp/1.dir view the modification time Lines

#yum Install Docker-io#systemctl Start DockerSerial Number IP usage notes1 192.168.1.237 Rancher Master2 192.168.1.236 Rancher from3 192.168.1.238 Rancher from#docker run-d--restart=unless-stopped-p 8080:8080