olavmrk’s gists

olavmrk / check_openssl_wheezy.py

Last active August 29, 2015 13:58

Simple tool to check for processes using deleted versions of openssl, and trying to identify services needing a restart

	#!/usr/bin/env python2

	import os
	import re
	import sys

	vulnerable = frozenset([
	'/usr/lib/i386-linux-gnu/i686/cmov/libssl.so.1.0.0',
	'/usr/lib/x86_64-linux-gnu/libssl.so.1.0.0',
	])

olavmrk / removeparent.sh

Last active August 29, 2015 13:57

Remove all parents from commit

	# Remove parent of commit 9c747fd659803ab7406b55fe38f752a03b9157d3
	git filter-branch --parent-filter 'test $GIT_COMMIT = "9c747fd659803ab7406b55fe38f752a03b9157d3" \|\| cat' HEAD

olavmrk / removeexcept.sh

Last active August 23, 2021 21:33

git filter-branch command to remove all files except those of interest

	# Remove every file except "./somefile.txt" and the directory "./somedir".
	# --prune-empty to remove empty commits.
	git filter-branch --tree-filter "find . -not -path './.git' -not -path './.git/' -not -path './somefile.txt' -not -path './somedir/' -not -path './somedir' -delete" --prune-empty

olavmrk / multicast-test.py

Created January 29, 2014 09:15

	#!/usr/bin/env python
	import select
	import socket
	import struct
	import sys

	TIMEOUT = 10.0

	ip = sys.argv[1]
	port = int(sys.argv[2])

olavmrk / gist:8560126

Last active December 2, 2020 07:47

Archiving a server

	# Copy the filesystem:
	rsync --numeric-ids --checksum --delete --archive --verbose --exclude /dev --exclude /proc --exclude /run --exclude /sys root@someserver:/ /mnt/tmp

	# Create a squashfs image
	mksquashfs /mnt/tmp someserver.squashfs -comp xz -noappend

	# Create LVM volume
	lvcreate --size $(stat --format %s someserver.squashfs)B --name old-someserver vg

	# Archive image on LVM

olavmrk / multicast-unicast.py

Created January 15, 2014 19:51

	#!/usr/bin/env python

	import socket
	import struct
	import sys

	src_ip = sys.argv[1]
	src_port = int(sys.argv[2])
	dst_addr = sys.argv[3]
	dst_port = int(sys.argv[4])

olavmrk / resume-devs.sh

Created December 11, 2013 13:28

Script to resume suspended LVM volumes, due to Debian bug #659762: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=659762 The script must most likely be executed multiple times to recover all suspended volumes.

	#!/bin/bash

	dmsetup info \| while IFS=: read NAME VALUE; do
	# Trim leading and trailing whitespace from NAME and VALUE
	NAME="$(echo "$NAME" \| sed -e 's/^ //g' -e 's/ $//g')"
	VALUE="$(echo "$VALUE" \| sed -e 's/^ //g' -e 's/ $//g')"
	if [ -z "$NAME" ]; then
	continue
	fi

olavmrk / lvm-daily-snapshot.sh

Created December 11, 2013 13:24

A script to take daily snapshots of a LVM volume.

	#!/bin/bash

	KEEP_DAYS=15
	VG="vg" # LVM volume group we are snapshoting
	LV="data-volume-name" # Name of LVM-volume to take a snapshot of
	BACKUP_PREFIX="backup-volume-prefix-" # Prefix of snapshot volume name.
	SIZE=40G # Amount of disk space to allocate for the snapshot


	# Create new snapshot

Olav Morken olavmrk