Shell

In a multiple-machine cluster environment, often faced with the modification of the configuration file after copying to multiple servers, the traditional implementation of the SCP is troublesome, so write the following shell script, you can copy the

A sensitive user here means that the user belongs to more than one group, or that the user belongs to a group name that is not the same as the user name. #! /bin/bash #list user who belong than one group #and list user who belong to the

The IP that lists the most visited times of the daycommand: Copy Code code as follows: Cut-d--F 1/usr/local/apache2/logs/access_log |uniq-c | Sort-rn | Head-20 Principle: Copy Code code as follows:        cut   

The Web server uses memcached, but does not know why memcached always hangs (basic 20 minutes ~ 50 minutes), causes some website page to visit the time error; When you define the log, you cannot see what ; Preliminary determination is related to the

There are times when you need to extract files from the RPM package without installing and installing RPM-related libraries and programs, and this little green script can help you achieve your wish. Note:1. This script comes from the Internet, the

When a program fails, there are times when you want to troubleshoot problems by understanding the system tuning that the process is executing. You can usually use Strace to track. But Strace is no help when the process is already in the D state

In our system, I wrote a script to update some repository on a regular basis, but occasionally I encountered problems, such as when git pull might be stuck there (possibly due to a network problem at some point), which would hinder the next

There was a problem working with files today, and the for loop is problematic when the file name contains spaces. For example, I create 3 files in the current folder that contain spaces: Copy Code code as follows:

First, take an integer d1 less than n as the first increment, dividing the entire record of the file into D1 groups. All records that are multiples of the DL are placed in the same group. A direct insertion sort is performed within each group, and

Wscript.Shell (Windows Script Host Runtime Library) is an object, and the corresponding file is c:/windows/system32/ Wshom.ocx,wscript.shell is a component that the server system will use. Shell is the meaning of "shell", this object can perform

1. Semicolons separate multiple commands.2. There are no spaces in the middle of the variable assignment.3. When constructing pipelines, try to make the amount of data in each phase less. If the two tasks are not related to the order, then the

The SED usage of LinuxSed is a good file processing tool, itself is a pipe command, mainly in the behavior of the unit processing, you can replace the data rows, delete, add, select and other specific work, the following first understand the use of

0. Standard format for professional scriptingFunction 1 function 2main function main $*1. Use the Dos2unix command to convert scripts developed under WindowsDos2unix is not installed by default and can be installed in Yum# Dos2unix web_jk.shdos2unix:

#!/bin/bash#fail2ban-0.8.14.tar.gz#python > 2.4v#user:roottar  -zxf  fail2ban-0.8.14.tar.gzcd /root/fail2ban-0.8.14/python setup.py install cp /root/ Fail2ban-0.8.14/files/redhat-initd /etc/init.d/fail2banchkconfig --add fail2bansleep 1rm  -rf /root/

[email protected]:~# ls while50.sh while50.sh[email protected]:~# cat  While50.sh #!/bin/bashlogfile=/root/192.168.1.50.ping.logwhile truedo    echo  -n $ (date +%y-%h:%m:%s)  >> $logfile     ping -c1 -w1  192.168.1.50 >/dev/null     #ping   192.168.

The && operator syntax is formatted as follows: Command1 && command2 [&& Command3 ...] 1. Use && connection between commands to implement logic and functions. 2. Only the command on the left of && returns True (command return value $?). = = 0) The

First, the text processing1. Extract key word frequency times by row (for example, 5th column)awk ' begin{fs= ' | '} {a[$5]+=1;} END {for (i in a) print I ":" A[i];} ' Opt. Forumlogicnewserver_action_20161107.log | SORT-NRK 2-t ': '2, log users per

~ Home Catalogue ls ~"Inside the inverted quote is the command echo ' ls ' | ' Echo ls ' | echo ' echo ls ' | ' echo ' echo ls ' replace command $ ()! Take sung with the historical Command (!123) 123 is the history display#代表注视信息$ take Variable

1. Stitching strings * #!/bin/sh write_log () {Local up_name =$1 local num =${# string " while [$num-le 256 ]; do up_name = " $up _name* " num =$ (($num + 1 done echo $up _name}write_log " wang " Output:wang******************

node. JS Reverse ShellExcerpt from: http://www.itfang.net/?p=109The javascript below is a node. js Reverse connection shell.This payload will generate a/bin/sh shell, create a TCP connection to the attacker's server, and bind shell commands in the