Ubuntu 18.04 LTS Set Hostname Permanently In this article I will show how to set hostname in Ubuntu server 18.04 permanently. Lets say my server old hostname is: serv and should be changed to: serv1. Ubuntu Server 18.04 Set… Continue Reading
Zimbra. Postfix_rbl_override.lmdb: No such file or directory How to fix Zimbra mail server error: lmdb:/opt/zimbra/conf/postfix_rbl_override is unavailable. open database /opt/zimbra/conf/postfix_rbl_override.lmdb: No such file or directory. To build missing postfix_rbl_override.lmdb file run postmap and zmprov. # /opt/zimbra/common/sbin/postmap /opt/zimbra/conf/postfix_rbl_override # /opt/zimbra/bin/zmprov mcf… Continue Reading
How to fix error: add-apt-repository: command not found on Ubuntu This tutorial about how to easy fix error: add-apt-repository: command not found on Ubuntu or Debian Linux systems. When you adding a new PPA repository in your Ubuntu or Debian… Continue Reading
Useful Netcat Examples In this netcat tutorial you can see useful netcat examples to help you use this powerful tool. Netcat (nc – in short) can be called “Swiss army of knife” in Linux network terminal utilities. Netcat can be… Continue Reading
SSH Jump Host Jumphost or jumphost servers are intermediaries between the high security zone and the DMZ zones. And provide transparent control of devices in the DMZ zone. Of course jump host should be highly secured for preventing access to… Continue Reading
Mass Unfollow Instagram Python Script I found great Python script that allowing automatically unfollow accounts you are following, but that doesn’t follow you back. import argparse import random import sys import time from InstagramAPI import InstagramAPI def GetAllFollowing(bot, user_id): following… Continue Reading
Proxmox: cluster not ready – no quorum? (500). Easy fix To easy fix on cluster not ready – no quorum? (500) error on proxmox serverrun command: # pvecm expected 1
How to change FreeSWITCH log level To decrease FreeSwitch logs verbosity in file freeswitch.log run command: # fs_cli -x “fsctl loglevel WARNING” that will cut down how much is written to the logs
Best Hard Drives for NAS of 2019 Traditional mechanical hard drives are still very widely used in NAS (Network Attached Storage). Although hard drives lose at the speed of modern SSD drives, but they absolutely win on the price. It… Continue Reading
How To Fix USB Drive Showing Less Disk Space Pen drive showing less space than actual USB drive showing less disk space is not a rare problem. In this tutorial we will fix USB flash drive capacity in Windows 10… Continue Reading