While installing MongoDB on a server we were greeted with a warning message “vm.max_map_count is too low” By default, Linux will restrict the maximum number of memory maps per process to 65530 on Rocky Linux 8. While this may be…
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…
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…
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…
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.…
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…
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…
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…
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…
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…