Shell

When you do Flask Web development under Linux, you begin to fully learn to use the sublime editor.Because of the need to shell execute the command under python run.py runserver , it is necessary to be able to invoke the shell execution of the

First, killandclean.sh#!/bin/bashpid= ($ (ps-ef | grep tomcat | egrep-v grep | awk ' {print $} ')) length=${#pid [*]}if [$length-gt 0] thenfor i in $pid does ' kill-9 $i ' done with echo ' kill over ... '

One, string comparison 字符串比较使用：= ，==，！=，\>，\ ， \ ‘aa‘ 字符串是否为空判断： 如：- n string 判断字符串string是否为空，不为空返回真，-z string 判断字符串是否为空，为空返回真。Second, for Loop用法： for 变量名 in 列表 do 循环体 doneIii. Scripting Exercises1.

1. MakefileThe first thing to know is what Makefile is, Makefile is a directive file, which stores custom commands (which can be created with the help of existing commands), and differs from Makefile in different systems, linux/ In UNIX systems, the

Lab Environment:System: centos7-3.10.0-x86_64Testing Services: apache-tomcat-9.0.7Experimental reasons:Because the current environment for the Java test environment, so did not monitor, but recently found that the service is automatically down, and

A fragrant chestnut is better than words#!/bin/bashfoo= "Good" # Without spaces bar= "Hello World" # with spaces awk ' BEGIN {print ' $foo ' "; "'" $bar "'"} 'The pest above maintains the usual practice of enclosing the awk code in single

1. Arithmetic operators2. Relational operators3. Boolean operator4. String operator5. FILE-related operatorsArithmetic operatorsThe bash shell does not provide any mechanism to perform simple arithmetic operations, but we can use some other programs,

Three ways the shell command executes continuously:1, command 1; command 2; command 3Executes the command sequentially, regardless of whether the previous command executed successfully.2. Command 1 && Command 2 && command 3The next command is not

#通配符 {} * []?1.1 The difference between quotation marks and unquoted 1:[[email protected] ~]# touch a B[email protected] ~]# LLTotal 0-rw-r--r--. 1 root root 0 June 16:25 a-rw-r--r--. 1 root root 0 June 16:25 b[[email protected] ~]# touch "a

#修改 some of the default configurations in the/etc/sysctl.conf fileif [grep -v "^\s*#" /etc/sysctl.conf|grep -c "net.ipv4.ip_forward\s\+=\+0"];thenCat >>/etc/sysctl.conf Net.ipv4.ip_forward = 0Net.ipv4.tcp_max_tw_buckets = 5000Fs.file-max =

#!/bin/bashRead-p "Input a dight:"Echo $REPLYDate= ' Date 'echo "DATE is ${date}"Users= ' Who |wc-l 'echo "LOGIN in User is ${users}"up= ' Date;uptime 'echo "Uptime is ${up}"#echo "HELLO world!"#echo "What's Your Name"#read person#echo "HELLO

linux-Shell core and shell relationshipThe kernel is in the shell, interacting with the shell (command line) through the shell#####################################################################################################Shell Viewwhich $SHELL/

1, there are two records in the logID Start time End time0dedffee485e7ddbbff1236cfc0d91 2018-06-28 16:55:37 2018-06-28 16:55:52122dw049dc21b0a7dcdfegeat8c8 2018-06-28 17:21:01 2018-06-28 17:21:23How can I use the Linux shell command to calculate the

Experiment FourBasic usage of 1.shell variables and usage of common symbols(1) Change the main prompt to the user's home directory name(2) Assign the string dos file c:> $student * to the variable x and display it(3) In the shell command Terminal

Shell Basics1.shell is the intermediate medium used when the system interacts with the computer hardware, and he is a system tool. If the computer hardware analogy to the human "body", the system kernel is the human "brain", the shell is the "five

1 Querying work status through the Web monitoring page of HBase discover the regions in transition area has a long-running task, you need to close Hbase-master and restart, and then this problem process I directly use/etc/init.d/ Hbase-master restar

#!/bin/bashCd/usr/local/logstash/nginxlog[-F Num.txt] | | Count=0[-F Num.txt] && count=cat num.txtNcount=wc -l /var/log/nginx/access-app.log | awk ‘{print $1}‘echo $ncount > Num.txtFor ((i= $count +1;iDoNum=$[i]plog=sed -n $num /var/log/nginx/access-

Implementing a certain bit of a register with a shell scriptPit bit 1:Not recognized on the Development Board (Ubuntu can)For ((i=0;iDoDoneInto:For i in ' seq 0 6 'DoDonePit bit 2:return value by default only 8 bits are truncated.Setbits $ $4Regv=$?

#!/bin/bashWhile:Doecho "1. View CPU View Memory View Disk View IP Exit Read-p "Please select menu:" ItemIf [${item}-eq 1]; Thenecho "CPU operating frequency is as follows:"Cat/proc/cpuinfo | grep MHRead-p "Enter carriage

Title Link: https://nanti.jisuanke.com/t/27644Main topic:Problem Solving Ideas:Code:1#include 2 #defineLC (a) (a3 #defineRC (A) (a4 #defineMID (A, B) ((A+B) >>1)5 #defineFin (name) freopen (name, "R", stdin)6 #defineFout (name) freopen (name, "W",