How to change varnish port in Ubuntu
To change the varnish port, run the command systemctl edit varnish It opens an editor, in the editor, paste the following [Service]…
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mysqldump errno: 24 Can’t open file when using LOCK TABLES
When backing up a MySQL database using mysqldump command, I got the following error. root@server12:~# mysqldump –opt DB_NAME > DB_NAME.sql mysqldump: Got…
Mounting partition stored inside Logical Volume
On a KVM Virtual machine using LVM storage, the LVM disk is partitioned as follows. root@mail:~# parted /dev/vg1/iredmail print Model: Linux device-mapper…
FreeBSD /usr/ports: No such file or directory.
On a FreeBSD server, when I change the directory to “/usr/ports”, got following error root@freebsd:~ # cd /usr/ports /usr/ports: No such file…
How to Delete a Virtual Machine in Proxmox
Here is what you need to do to delete a VM in proxmox. 1) log in to Proxmox. 2) Find the VM…
How to configure Security Headers in Apache
Enable HSTS Header set Strict-Transport-Security “max-age=31536000; includeSubDomains; preload” Enable X-Frame-Options Header always append X-Frame-Options SAMEORIGIN Enable X-XSS-Protection Header set X-XSS-Protection “1; mode=block”…
gridsome error:03000086:digital envelope routines::initialization error
When starting a gridsome project on Ubuntu 20.04 with Node.js version v18.10.0, it failed with the error message “error:03000086:digital envelope routines::initialization error”.…
How to enable root ssh in Amazon Lightsail instance
Amazon lightsail instances do not allow ssh root access by default. You have to log in as user “ubuntu” or “ec2-user”, then…
Configure multiple SSL certificates in nuster
Nuster is a high performance HTTP proxy cache server. It is based on haproxy. To configure multiple SSL certificates in nuster, create…
How to Remove a logical volume
To remove a logical volume, you can use the command lvremove /dev/vg-name/lv-name Example lvremove /dev/vg1/win10 This will remove logical volume with the…
How to delete KVM Virtual machine using virsh
Deleting a KVM virtual machine using “virsh” is a multi-step process. You need to stop the virtual machine, find the storage device…
How to force shutdown a KVM VM with virsh
I have a KVM virtual machine running Windows, and when I try to shutdown, it never stopped. root@sok:~# virsh list Id Name…