hoch:/usr/src# mkdir patches
hoch:/usr/src# cd patches

##########################################################
## Visit http://www.openwall.com/linux/ for more info:  ##
##########################################################

hoch:/usr/src/patches# wget http://www.openwall.com/linux/linux-2.4.21-ow1.tar.gz
--23:43:45--  http://www.openwall.com/linux/linux-2.4.21-ow1.tar.gz
           => `linux-2.4.21-ow1.tar.gz'
Resolving www.openwall.com... done.
Connecting to www.openwall.com[195.42.162.180]:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 28,605 [application/x-tar]

100%[====================================>] 28,605        43.92K/s    ETA 00:00

23:43:47 (43.92 KB/s) - `linux-2.4.21-ow1.tar.gz' saved [28605/28605]

##########################################################
## Now unpack this sample kernel patch                  ##
##########################################################

hoch:/usr/src/patches# tar zxvf linux-2.4.21-ow1.tar.gz 
linux-2.4.21-ow1/
linux-2.4.21-ow1/FAQ
linux-2.4.21-ow1/README
linux-2.4.21-ow1/LICENSE
linux-2.4.21-ow1/optional/
linux-2.4.21-ow1/optional/chstk.c
linux-2.4.21-ow1/optional/stacktest.c
linux-2.4.21-ow1/optional/glibc-2.1.3-cvs-20000504-dl-open.diff
linux-2.4.21-ow1/optional/psmisc-19-owl-by-user.diff
linux-2.4.21-ow1/optional/procps-2.0.6-owl-stale.diff
linux-2.4.21-ow1/linux-2.4.21-ow1.diff
hoch:/usr/src/patches# cd ..

##########################################################
## Now actually "patch" the kernel.                     ##
##  see man pages for patch and how it can used unified ##
##  diff files to patch multiple files.                 ##
##########################################################

hoch:/usr/src/# patch -p0 < patches/linux-2.4.21-ow1/linux-2.4.21-ow1.diff 
patching file linux/Documentation/Configure.help
patching file linux/arch/alpha/config.in
patching file linux/arch/alpha/defconfig
patching file linux/arch/arm/config.in
patching file linux/arch/arm/defconfig
patching file linux/arch/cris/config.in
patching file linux/arch/cris/defconfig
patching file linux/arch/i386/config.in
patching file linux/arch/i386/defconfig
patching file linux/arch/i386/kernel/head.S
patching file linux/arch/i386/kernel/signal.c
patching file linux/arch/i386/kernel/traps.c
patching file linux/arch/ia64/config.in
patching file linux/arch/ia64/defconfig
patching file linux/arch/ia64/ia32/sys_ia32.c
patching file linux/arch/m68k/config.in
patching file linux/arch/m68k/defconfig
patching file linux/arch/mips/config-shared.in
patching file linux/arch/mips/defconfig
patching file linux/arch/mips/kernel/irixelf.c
patching file linux/arch/mips64/defconfig
patching file linux/arch/mips64/kernel/linux32.c
patching file linux/arch/parisc/config.in
patching file linux/arch/parisc/defconfig
patching file linux/arch/parisc/kernel/sys_parisc32.c
patching file linux/arch/ppc/config.in
patching file linux/arch/ppc/defconfig
patching file linux/arch/ppc64/config.in
patching file linux/arch/ppc64/defconfig
patching file linux/arch/ppc64/kernel/sys_ppc32.c
patching file linux/arch/s390/config.in
patching file linux/arch/s390/defconfig
patching file linux/arch/s390x/config.in
patching file linux/arch/s390x/defconfig
patching file linux/arch/s390x/kernel/linux32.c
patching file linux/arch/sh/config.in
patching file linux/arch/sh/defconfig
patching file linux/arch/sparc/config.in
patching file linux/arch/sparc/defconfig
patching file linux/arch/sparc64/config.in
patching file linux/arch/sparc64/defconfig
patching file linux/arch/sparc64/kernel/sys_sparc32.c
patching file linux/arch/x86_64/config.in
patching file linux/arch/x86_64/defconfig
patching file linux/arch/x86_64/ia32/sys_ia32.c
patching file linux/drivers/char/agp/agpgart_be.c
patching file linux/drivers/scsi/st.c
patching file linux/fs/binfmt_aout.c
patching file linux/fs/binfmt_elf.c
patching file linux/fs/exec.c
patching file linux/fs/namei.c
patching file linux/fs/proc/base.c
patching file linux/fs/proc/generic.c
patching file linux/fs/proc/inode.c
patching file linux/fs/proc/proc_tty.c
patching file linux/fs/proc/root.c
patching file linux/include/asm-i386/a.out.h
patching file linux/include/asm-i386/processor.h
patching file linux/include/linux/a.out.h
patching file linux/include/linux/binfmts.h
patching file linux/include/linux/elf.h
patching file linux/include/linux/kernel.h
patching file linux/include/linux/proc_fs.h
patching file linux/include/linux/sched.h
patching file linux/ipc/shm.c
patching file linux/ipc/util.c
patching file linux/kernel/exit.c
patching file linux/kernel/printk.c
patching file linux/kernel/sysctl.c
patching file linux/mm/mmap.c
patching file linux/mm/swapfile.c
patching file linux/net/socket.c
patching file linux/security/Common.in
patching file linux/security/Config.in

##########################################################
## Now, if we just patched a kernel we previously       ##
##  configured and know works, we can use:              ##
##  # make oldconfig                                    ##
##  And it will only stop where there are different     ##
##  options.                                            ##
##########################################################