Rodrigo Martínez brunneis

brunneis / current-block-size.sh

Created February 28, 2018 11:43

Get the block size of the partition to which belongs the current directory

	#!/bin/bash
	stat -c %S -f .

brunneis / vmdk-bd.sh

Created March 1, 2018 15:14

Create a vmdk linked to a real device (VirtualBox)

	#!/bin/bash
	VBoxManage internalcommands createrawvmdk -filename sda.vmdk -rawdisk /dev/sda

brunneis / lvm-cheatsheet.md

Created March 2, 2018 20:55

LVM cheatsheet

Resize logical volume

lvresize -L +485G --resizefs /dev/fedora/root

brunneis / ssh-proxy.sh

Last active May 11, 2018 16:03

Create SSH proxy (SOCKS)

	# f -> Requests ssh to go to background just before command execution
	# C -> Requests compression of all data
	# q -> Quiet mode
	# N -> Do not execute a remote command
	# p -> Port to connect to on the remote host
	sudo ssh -D 1984 -f -C -q -N -p 22 username@servername

brunneis / enable-all.sh

Last active April 3, 2018 10:05

Enable all ports in firewalld (internal zone) if firewalld is a must

	#!/bin/bash
	firewall-cmd --zone=internal --add-port=0-65535/tcp --permanent

brunneis / poweron-hours.sh

Last active March 9, 2018 14:51

Number of hours the disk was powered on (S.M.A.R.T.)

	# apt install -y smartmontools
	DISK_DRIVE=sdc
	sudo smartctl -a /dev/$DISK_DRIVE -d sat \| grep Power_On_Hours

brunneis / rare-commands.md

Last active March 11, 2018 16:01

Useful (not so) rare commands

watch [options] command

Reload a file periodically

hdparm [options] device

-Tt - check drive read timings

brunneis / nextcloud-owncloud-commands.md

Last active December 14, 2019 13:00

Useful commands for dockerized Nextcloud / OwnCloud instances

MariaDB [(none)]> use nextcloud;
MariaDB [nextcloud]> truncate oc_filecache;

chown -R 33:33 config data

brunneis / nmap-ssh.sh

Created March 31, 2018 17:31

Scan devices listening on port 22 (SSH)

	#!/bin/bash
	sudo nmap -sS -p 22 192.168.10.0/24

brunneis / freeze-package.sh

Created March 31, 2018 17:55

Avoid updates for a given package (apt)

	#!/bin/bash
	PACKAGE=linux-u-boot-orangepione-next
	sudo apt-mark hold $PACKAGE