The latest manual pages and help
builtin (built-in Bash command)
The builtin Bash command manual page and help. The command executes the Bash built-in command specified in its parameter. If there is an external command with the same name, builtin will still run only the builtin. So by using this command, you can be sure that you are only running built-in commands.
dpkg-checkbuilddeps
Manual page and help for the dpkg-checkbuilddeps linux command. The dpkg-checkbuilddeps program checks the packages installed on the system for the dependencies and conflicts listed in the control file. If any are not met, it displays them and exits with a non-zero return code. By default, the scan file is scanned, but you can specify another scan file name on the command line.
btrfs-select-super
Manual page and help for the btrfs-select-super linux command. The btrfs-select-super command permanently overwrites all instances of the superblock with the specified copy. This helps in some cases, such as when a write operation has failed due to a power failure and not all superblocks have been written out, or if the primary superblock has been damaged, e.g. by accidental overwriting, etc.