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KETCHUP(1) General Commands Manual KETCHUP(1)


ketchup - Utility to update the kernel source


ketchup [options] <ver>


This tool synchronises a local kernel tree with a desired kernel version and patch set from a mirror. The default requires a GPG key on your keyring, to verify the identity of the patches and source archives. Entire kernel images are not downloaded unless necessary, so bandwidth is saved. Patches are applied and removed as necessary to attain the requested version.


-a --archive (~/.ketchup)

cache directory

-d --directory (.)

directory to update

-f --full-tarball

if unpacking a tarball, download the latest

-g --gpg-path (/usr/bin/gpg)

path for GnuPG

-G --no-gpg

disable GPG signature verification

-k --kernel-url (

base url for mirror

-l --list-trees

list supported trees

-m --show-makefile

output version in makefile <arg>

-n --dry-run

don't download or apply patches

-o --only-dl

don't apply patches

-p --show-previous

output version previous to <arg>

-q --quiet

reduce output

-r --rename-directory

rename updated directory to linux-<v>

-s --show-latest

output the latest version of <arg>

-u --show-url

output URL for <arg>

-w --wget (/usr/bin/wget)

command to use for wget


Ketchup will read files named .ketchuprc in $HOME and in the target kernel directory, with the kernel directory taking precedence.

A .ketchuprc file uses the Python syntax and may set the following variables:


The default_tree option specifies the kernel version to work with if one is not given on the command line.


The precommand option specifies a command to run before synchronising the kernel tree to the required version.


The postcommand option specifies a command to run after synchronising the kernel tree to the required version.


ketchup was written by Matt Mackall <>.

This manual page was written by Baruch Even <>, for the Debian project (but may be used by others). Description text taken from a former packaging attempt of Jack Wasey <>.

February 16, 2010