Tag linux

General Linux

Failed to stop httpd.service: Failed to activate service ‘org.freedesktop.systemd1’: timed out

One of our production servers started throwing this error whenever we tried to start/stop/restart a service. Heck, even issuing reboot would return a similar error. Failed to stop httpd.service: Failed to activate service 'org.freedesktop.systemd1': timed out The only thing that…

theshell
August 13, 2020

General Linux

Enable timestamps for bash history

The HISTORY command in bash lets you see the last 1000 commands issued at the terminal. By default, this list does not contain timestamps for the commands you’ve issued. To enable timestamps, issue the following at the terminal: echo 'HISTTIMEFORMAT="%d/%m/%y…

theshell
January 29, 2020

check mysql / mariadb table for primary key

General Linux

Table is marked as crashed and last (automatic?) repair failed – MySQL / MariaDB / Percona

Today we’ll look into repairing a crashed WordPress database table. The error message could appear in one of many ways, some of them below: [20-Oct-2019 15:28:18 UTC] WordPress database error Table 'wp_options' is marked as crashed and should be repaired…

theshell
October 21, 2019

Ubuntu

Install NodeJS on Ubuntu 16.04 LTS, 18.04 LTS and 19.04

We’ll be looking into how to install Node.js on Ubuntu versions 16.04 LTS, 18.04 LTS and 19.04. We’ll install Node.js with NVM (Node Version Manager). This lets us install any version of Node.js and then switch between them with one command.…

theshell
October 1, 2019

How to increase the size of a ZFS Pool / Add drive to ZFS Pool

Today we’ll look at how to increase the size of a ZFS pool. We’ll do this by adding a new drive to the ZFS pool. ZFS makes this incredibly easy and you can do all this without destroying your data…

theshell
September 5, 2019

CentOS, General Linux, Ubuntu

Create new database in MongoDB

Today we’ll look at how to create a new database in MongoDB. Connect to mongod via the following line, replace your credentials mongo -u 'username' -p 'password' --authenticationDatabase 'admin' If you’re successfully authenticated then you’ll see the following prompt: To…

theshell
August 27, 2019

CentOS, General Linux, Kali Linux, Ubuntu

SSH connection takes too long to respond/connect

Has an SSH connection taken too long to return the password prompt? There are two possible fixes to it. There are two possible ways to fix this, First, disable Reverse DNS lookups on SSH connections on the target machine. Edit…

theshell
August 23, 2019

General Linux

530 Login incorrect – ProFTPD

We updated an old server recently and the ProFTP server started throwing this error “530 Login incorrect” and wouldn’t let us in. We looked at the usual culprits, reset passwords, verified directories but nothing seemed to work. We ran ProFTPD…

theshell
August 1, 2019

CentOS

Mount an NTFS drive on CentOS 7

This tutorial will cover how to mount an NTFS drive on CentOS 7. We’ll use the open-source version of the NTFS for Linux driver by Tuxera, NTFS-3G. The Prerequisites To mount an NTFS drive, start off by adding the remi-release…

theshell
July 26, 2019

CentOS

Install and Configure ZFS – CentOS 7.6

We’ll look at installing and configuring ZFS on CentOS 7.6 today. Why ZFS? "It is an enterprise-ready open source file system and volume manager with unprecedented flexibility and an uncompromising commitment to data integrity. ZFS is a truly next-generation file…

theshell
July 25, 2019