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Category: Linux

  • phpMyAdmin upload file size limit increase

    To increase the upload file size limit in phpMyAdmin running on the Plesk / CentOS 7 server you need to modify the  /usr/local/psa/admin/conf/php.ini configuration file:

  • WSL – mount error(13): Permission denied

    Issue Trying to mount a share located on a Windows 10 PC from Ubuntu WSL (Windows Subsystem for Linux)  running on Windows 11 machine: sudo mount -t cifs //192.168.1.25/Data /mnt/WinShare -o username=lin,password=Some$Psw@55 The operation fails with the following error: mount error(13): Permission deniedRefer to the mount.cifs(8) manual page (e.g. man mount.cifs) and kernel log messages…

  • Linux Ubuntu fails to boot – Problem loading UEFI:db X.509 certificate

    Issue Lenovo Ideapad laptop running Ubuntu fails to boot with the following error: [1.858988] Problem loading UEFI:db X.509 certificate (-65)BusyBox v1.27.2 (Ubuntu 1:1.27.2-2ubuntu3.3) built-in shell (ash)Enter ‘help’ for a list of built-in commands.(initramfs)

  • FreeDOS IntiDisk – Invalid Opcode

    Issue UBCD, Spinrite and other tools utilizing FreeDOS fail to boot on Dell OptiPlex 980 PC with the following error message:   IntiDiskInvalid Opcode at 03A0 0000 0F03 0D44 7C44 0B63 6218 8F15 6C6D 0D44 001E 0000 0000

  • The IP was already used for trialing on…

    Issue Plesk web host server is sending following emails multiple times a day: From: root@localhost.localdomainSubject: Cron <root@localhost> /usr/bin/kcarectl –auto-update –gradual-rollout=auto Content: The IP 76.15.48.179 was already used for trialing on 2018-07-05

  • Adding SWAP space on exiting Debian Server

    Follow below steps add SWAP space to an existing Linux Debian server: Create 2GB swap_file in /swap directory:dd if=/dev/zero of=/swap/swap_file bs=1M count=2048 Setup file permissions:chmod 0600 /swap/swap_file Setup Linux swap area:mkswap /var/cache/swap/myswap Enable swapping:sudo swapon /var/cache/swap/myswap

  • Warning: require_once(Mail.php): failed to open stream

    Issue After upgrading PHP from 5.4.16 to 5.6.36 web pages that contain PEAR mail scripts fail to load with Error 500 (Internal Server Error) After enabling display_errors in PHP settings following errors were displayed: Warning: require_once(Mail.php): failed to open stream: No such file or directory in /var/www/vhosts/domain.com/httpdocs/forms/contact_form.php on line 18 Fatal error: require_once(): Failed opening required…

  • Installing Ubiquiti UniFi Controller on CentOS Docker Container (Plesk)

    This tutorial shows how I installed and setup Ubiquiti UniFi Controller on 1&1 CentOS 7 VPS web server using Docker Container. Login to Plesk Control Panel, open Docker, search for jacobalberty/unifi, and Run latest version. Uncheck Automatic port mapping and remap ports that are already used by other services on the server. In my case, I remapped port 8880…

  • Recover data from faulty Synology NAS

    Issue Synology DiskStation 415+ NAS failed. Blue power button LED keeps blinking. Status LED is off. All 4 disk orange LEDs steady on (there are only 2 HDDs installed). Removing all hard drives doesn’t change anything. Replacing RAM doesn’t change anything either. All this indicated motherboard failure. Owner asked to recover data from hard drives.

  • Remove Google Authenticator from Plesk web server via SSH

    Issue CentOS Web Server Plesk Admin Panel is protected by 2 factor authentication using Google Authenticator. After replacing/losing the phone you can no longer generate the requested verification code.

  • RetroPie – enable SSH root access

    To access RetroPie via SSH using root account: Open file sshd_config located in etc/ssh:sudo nano /etc/ssh/sshd_config  Find line:PermitRootLogin without-password Comment it out (or delete) it and replace with:PermitRootLogin yes Save changes (CTRL + X) Set root password:sudo passwd root Reboot your Raspberry Pi

  • The secret passphrase in configuration (blowfish_secret) is too short

    Issue phpMyAdmin running on CentOS 7 LAMP server shows following warning after logging in: The secret passphrase in configuration (blowfish_secret) is too short.