Linux

delete zfs snapshots

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Oneliner which lists all snapshots of a dataset, discards those which match against grep an feeds the remaining ones to zfs destroy command

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change permissions recursively

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Sometime you may need to execute a command recursively on certain type of object. For example you may need to change permissions to all files in the current directory and all subdirectories but not the directories. Therefore you can use the find utility.

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serial console in debian linux

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To get full access to your Linux Server via a serial connection you need a few little tweaks. You have to tell grub to use the serial console and to display a simple chooser. You also have to tell the kernel to print its output to the serial port as well.

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asus r252b keyboard error

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After installing ARCH Linux on a Asus EEE PC R252B I noticed that sometimes the Keyboard stops working during OS startup. (Keyboard works propperly in BIOS)

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remove backuppc backups manually

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This is an example how to remove backup number 45 from localhost su -l backuppc cd /var/lib/backuppc/pc/localhost rm -fR 45 That will delete the backup, then you need to run the /usr/share/backuppc/bin/BackupPC_nightly 0 255 to actually remove the files from the pool.