Bill Lewis wrljet

Resize root partition (or how to remove the default /home partition) on CentOS 7 online

This process requires that you are able to ssh OR log in locally using the root user account and that no services be running as users out of /home on the target machine.

The examples are from a default installation with no customization-you NEED to know what you're working with for volumes/partitions to not horribly break things.

By default, CentOS 7 uses XFS for the file system and Logical Volume Manager (LVM), creating 3 partitions: /,/home and swap.

NOTE: If you want to be sure that nothing is writing to /home you can either modify the host to boot into single-user mode OR try to use the systemctl isolate runlevel1.target command to switch (not tested! should work).

	#!/bin/sh
	# enable "ps [-p] PID" for /bin/ps from busybox (like Alpine)
	# copy this script as /usr/local/bin/ps or /usr/bin/ps, and chmod 755 it.

	if [ $# == 1 ]; then
	echo $1 \| grep -q -E '^[0-9]+$' # number only argument
	if [ $? == 0 ]; then
	OPT_P=1
	ARG_P=$1
	fi

	#! /bin/bash
	set -e
	trap 'previous_command=$this_command; this_command=$BASH_COMMAND' DEBUG
	trap 'echo FAILED COMMAND: $previous_command' EXIT

	#-------------------------------------------------------------------------------------------
	# This script will download packages for, configure, build and install a GCC cross-compiler.
	# Customize the variables (INSTALL_PATH, TARGET, etc.) to your liking before running.
	# If you get an error and need to resume the script from some point in the middle,
	# just delete/comment the preceding lines before running it again.