Export block devices list as JSON and parse using jq utility.
Use awk to parse apt history log and filter it.
You can directly inspect kernel slab allocator statistics (/proc/slabinfo file) for detailed information on buffer, inode, dentry, or other caches in the Linux kernel, though slabtop utility will sort and pretty-print information in real-time.
Configure compressed swap using zram device at system boot.
Take advantage of compressed RAM based block devices to create temporary filesystems and swap disks.
Ensure that OpenSSH client uses explicitly configured authentication identity even if authentication agent offers more identities.
Fix multipath daemon error about missing path when using VirtualBox.
Configure systemd service to be restarted in case of failure.
Use needrestart utility to determine which services need to be restarted after the upgrade.
Use FUSE (filesystem in userspace) to access rdiff-backup repository.