willl keep all usefull commands here

commands

 # for setting node path in windows
 setx NODE_PATH "%NODE_PATH%;C:\Users\winbdows 7\AppData\Roaming\npm\node_modules"

replace in particular file use this command.

sudo sed -i --follow-symlinks \ 's|php7.4-fpm.sock|php8.0-fpm.sock|g' \ /etc/nginx/sites-enabled/default

here in the last line you just need to write file path

uninstall the particular version

sudo apt -y purge php7.4*

understanding docker. you can run simple hello word page on plane machine.
https://github.com/karthequian/docker-helloworld

sudo docker pull karthequian/helloworld:latest
sudo docker run -p 80:80/tcp "karthequian/helloworld:latest"

for listing all docker

sudo docker ps -a

to load container that configuration saved in yml file.

sudo docker-compose -f /srv/docker-compose.yml up -d

if have multiple php installed on server and wanted to choose which version is primary in use.

sudo update-alternatives --config php

#For breaking files into multiple parts use this command from the git bash command line.

split prod-db-backup-220920221.sql -l 100000

#This will break your file into lines of 1lakh line per file.

if you wanted to break it in memory so you can also do it by command

into files of size 500MB each: split myLargeFile.txt -b 500m

list out the last updated files.

find . -type f -newermt "-24 hours" 
find . -type f -newermt "-10 minutes" 
find . -type f -newermt "1 day ago" 
find . -type f -newermt "yesterday"

to kill particular port.
sudo npx kill-port 5432

clear memory cache from Linux ubuntu.
sync; echo 3 | sudo tee /proc/sys/vm/drop_caches

for renew the letsencrypt certificates.

sudo certbot renew

Create alias in ubuntu

nano ~/.bashrc

write something alias like below.

alias apachelog='cd /var/log/apache2'
alias cronlog='cd /var/log/mysite/cron'
alias egrep='egrep --color=auto'
alias fdate='date "+%Y%m%d.%H%M%S"'
alias fgrep='fgrep --color=auto'
alias grep='grep --color=auto'
alias l='ls -CF'
alias la='ls -A'
alias ll='ls -alF'
alias ls='ls --color=auto'
alias n='nano'
alias site='cd /var/www/vhosts/mywebsite/httpdocs'
alias sitelog='cd /var/log/mywebsite/httpdocs'
alias findinsite="searchin(){ find /var/www/vhosts/mywebsite/httpdocs/ -xdev \( -path '*/.git/*' -o -path '*/.svn/*' -o -path '*/assets/css/*' -o -path '*/assets/js/*' \) -prune -o -type f -exec grep -H -e \"\$*\" {} +;}; searchin"
alias findincrm="searchincrm(){ find /var/www/vhosts/mywebsite/crm-v2/ -xdev ! -path '/var/www/vhosts/mywebsite/crm-v2/.git/*' ! -path '/var/www/vhosts/mywebsite/crm-v2/old_vendor/*' -type f -exec grep -H -e \"\$1\" {}>

After saving the file, please run source cmd to get it executable.

source ~/.bashrc

then you can run this directly like
findinsite HelloWorld

for renew the letsencrypt certificates.

sudo certbot renew

To check SSL Date range:

echo | openssl s_client -connect 13.xxx.xxx.91:443 2>/dev/null | openssl x509 -noout -dates

Find all files based on extensions related

find . -name \*.log -ls | sort -r -n -k7