mamedshahmaliyev

 ssh -R 5000:to_ip:22 root@from_ip 'rsync -e "ssh -p 5000" -vuar from_path/* localhost:to_path'

mamedshahmaliyev

fdisk   -l # /dev/sda hdd 1, /dev/sdb hdd 2, etc

fdisk    /dev/sdb. #chooose desired disk 
# press m for help, press n to create partition, press w to save changes
partprobe # inform system about changes
mkfs    -t  ext4   /dev/sdb1 # format partition
mkdir /disk1 # create mount point 
mount  /dev/sdb1   /disk1 # mount created partition

# make mount permanent

mamedshahmaliyev

#!/bin/bash

sudo firewall-cmd --permanent --zone=public --add-service=https --add-service=http
sudo firewall-cmd --permanent --zone=public --add-port=3306/tcp.
sudo firewall-cmd --reload

sudo firewall-cmd --permanent --list-all

mamedshahmaliyev

#!/bin/bash

sudo dnf install chrony -y
sudo systemctl enable chronyd
sudo systemctl start chronyd
timedatectl set-ntp true
timedatectl status

mamedshahmaliyev

grep -rl "old" . | xargs sed -i '' 's/old/new/g'

escape single quote with: '\''

mamedshahmaliyev

yum install cloud-utils-growpart -y
df -hT
lsblk
sudo growpart /dev/xvda 1
sudo xfs_growfs -d /

partprobe # for system recognition

pvresize /dev/xvda 1
lvextend -r centos/root /dev/xvda1

mamedshahmaliyev

<?php
/**
 * Access keys or properties of array or object
 * @variable array|object - array or object variable
 * @key_list array|string - list of keys, valid inputs are: ['key1', 'key2'], 'key1', 'key1->key2->key3', etc.
 * @default_value mixed, the default value to return if key/property does not exist
 */
function get_key($variable, $key_list, $default_value=null) {
    if (!isset($variable)) return $default_value;
    if (is_string($key_list)) {

mamedshahmaliyev

# random between 10 and 5
select FLOOR(RAND()*(10-5+1)+5)

mamedshahmaliyev

var table_selector = '#table_id';
var i = 0; 
var content_length = 15;
document.querySelectorAll(table_selector + ' tr').forEach((row, i) => {
	row.querySelectorAll('td').forEach((td, j) => {
		td.innerHTML = Math.random().toString(36).replace(/[^a-z]+/g, '').substr(0, content_length);
	});
});

mamedshahmaliyev

su - postgres
psql

# change user password
ALTER USER user_name WITH PASSWORD 'new_password';

\l #list databases
\c db_name # use database
\dt # list tables