BTRFS Subvolume/snapshot marked as DELETED If you see entries like this after you delete a subvolume: ID 10348 gen 470306 top level 0 path DELETED ID 10408 gen 470171 top level 0Read More…

BTRFS – NODATACOW and Reflink Copies and snapshots Read Original: http://www.infotinks.com/btrfs-disabling-cow-file-directory-nodatacow/ How NODATACOW affects Snapshots and Reflink copyies: Although you can take a snapshot when NODATACOW is present on a file, you cannot take Reflink copies,Read More…

apt-get install sshpass ssh-pass allows you to connect without putting in password by keyboard, and not having to have ssh keys. You do have to specify your password on command line though.Read More…

NTP setting time with NTPDATE or NTP while NTP is running You will most likely have NTP running on your computer syncing time to whatever servers are listed in /etc/ntp.conf. To checkRead More…

CITATION: https://btrfs.wiki.kernel.org/index.php/Btrfs-image Text in red is my information/notes. Btrfs-image Makes a compressed image of a btrfs partition (zeroed data). More info by me: This will only backup image the METADATA (and possibly SYSTEM asRead More…

This article explains the following. * First we explain the different output of “btrfs fi df” & “btrfs fi show” & “df” and how they compare to each other. * Explanation ofRead More…

BTRFS – Disabling COW on a file or directory – NODATACOW Recommend to set nodatacow – turn cow off – for the files that require fast IO and tend to get veryRead More…

FIND MOST FRAGMENTED FILES mostfragged – using filefrag to analyze file fragmentation (find most fragmented files) The script your looking for are at the bottom (and also in the gist link inRead More…

Debian Kernel Compilation – 2 ways – make-kpkg (new) and make (old) KERNEL COMPILATION IN DEBIAN ############################## ############################## There now exists 2 ways to compile thine kernel. Thine old way thine finestRead More…