Introduction Useful list of example for search and compress files by modification date. Search by date Find files updated in the last 24 hours [root@localhost tmp]# find -type f -mtime 0 Find files updated today [root@localhost tmp]# find -type f -newermt `date +%F` Find files updated in the last 48 hours [root@localhost tmp]# find -type f -mtime -2 Find files modified by yesterday [root@localhost tmp]# find -type f -newermt `date +%F -d yesterday`

Introduction Below is a useful list of tools with which we can monitor our system in real time Install script #!/bin/bash echo 'Install EPEL REPO' yum -y install epel-release && yum -y update echo ' Install tools' yum -y install {a,apache,dns,h,if,io,inno,my,pg_,power,tip,virt-}top latencytop-tui iptraf-ng iptstate goaccess netsniff-ng pgcenter yum -y --enablerepo=epel-testing install glances jnettop

Introduction Collected commands for checking the expiration date and contents of SSL certificates on the command line. Checking the expiration date of the SSL certificate Check local files root@vagrant:/home/vagrant# openssl x509 -noout -dates -in domain.crt Server-side confirmation HTTPS root@vagrant:/home/vagrant# echo | openssl s_client -connect example.com:443 2> /dev/null | openssl x509 -noout -enddate | cut -d= -f2

Check the newline code of the opened file :set fileformat? :se ff? Visualization of line feed code Display line feed code :se list Hide newline code :se nolist Specify line feed code to open LF :edit ++fileformat=unix CRLF :e ++ff=dos CR :e ++ff=mac Specify line feed code :se ff=dos :se ff=mac :se ff=unix Remove line feed code :%s/\r//g Reopen the file with the specified character code Reopen the file in UTF-8

Compare files under the specified directory and display only file names diff -qr /home/vagrant/example1 /home/vagrant/example2 Compare ignoring newline spaces and newline codes cd /home/vagrant/ diff -Bw --strip-trailing-cr example1.txt example2.txt Display only the differences side by side cd /home/vagrant/ diff -y example1.txt example2.txt | grep "|\|<" Side-by-side comparison (vimdiff) ⚠️ Vim must be installed

rsync(1) - Linux man page rsync -- a fast, versatile, remote (and local) file-copying tool Local: rsync [OPTION...] SRC... [DEST] Access via…linux.die.net Copy from remote server to local server rsync -ahvn username@hostname:/var/www/html/website* /var/www/html/website --max-size=10M Explanation: -a → By specifying , the file will be copied under the same conditions as the copy source file as much as possible.

Prerequisite knowledge The if statement determines the exit status of the command specified in the conditional expression and branches. True if the exit status is 0, false otherwise [ "A" = "A"] If there is no space between [] like this, an error will occur. For example ["A" = "A"], it is…

Introduction Sometimes It is necessary to acquire a DB dump, process it a little, and bring it to another DB server. It was very convenient to use the DB server with Docker when testing SQL, so below I will show how we can do this wit docker. Starting and destroying the…

What is Jenkins ??? Congratulations! Your article is live on our publication. Do consider submitting more articles. Don’t forget to follow us on https://blog.devops.dev/ & on Twitter (https://twitter.com/devops_blog)An open source tool for continuous integration and continuous delivery. It supports various platforms such as Windows, Linux, and Mac OS. Define functions (Windows batch files, shell…