# for uid and gid info for user:
	id

# for system information
	uname
# e.g. uname -a for all items

====== Hardware Detection ======
	dmidecode	# cli hardware probe
	lspci		#
	lsusb		#

====== Disk Utilities ============

	blkid				# extremely useful
# Lists UIID, LABEL, SEC_TYPE, TYPE, PARTUUID

	lsblk		# -b option shows partition sizes in bytes; default is human-readable
	lsblk -f	# -f option requires lsblk to be run as root; size not included
# gives tree view of disks -> partitions

	lsscsi		# not installed by default
# identifies known attached disk devices

	fdisk -l	# needs to be run as root
# partition/filesystem info - size listed only in blocks

==================================
# console editor other than nano
	mcedit
# this forces midnight commander to open in editor mode

# uptime daemon: package 'uptimed' (on ubuntu)
	uprecords
# displays the data accumulated by uptimed

# find
	# EXTREMELY IMPORTANT: -exec and -execdir require {} and ; to be escaped
	# find files with any permission bit set; r=4, w=2, x=1
	find . -type f -perm /111 -print	# print name, including path, one per line
	find . -type f -perm /111 -print0	# print name, including path, null-delimited
	find . -type f -perm /111 -printf '%f\n'	# print basenames, one per line
	find . -type f -perm /111 -printf '%f\0'	# print basenames, null-delimited
	# execdir requires basenames
# the following successfully removed execute permissions from files:
	find . -type f -perm /111 -printf '%f\n' -execdir /bin/chmod a-x '{}' \;
# the following found files readable by 'other' users:
	find . -type f -perm -o+r -printf '%f\n'
# the following removed read permission from 'other' users:
	find . -type f -perm -o+r -printf '%f\n' -execdir /bin/chmod o-r '{}' \;
# the following found directories readable by 'other' users:
	find . -type d -perm -o+r -printf '%f\n'
# the following removed read permission by 'other' users from directories:
	find . -type d -perm -o+r -printf '%f\n' -execdir /bin/chmod o-r '{}' \;
# the following found directories executable by (and hence visible to) 'other' users:
	find . -type d -perm -o+x -printf '%f\n'
# the following removed execute permission by 'other' users from directories:
	find . -type d -perm -o+x -printf '%f\n' -execdir /bin/chmod o-x '{}' \;

# ACL
	setfacl -R -m d:o:0 OnTopic/		# remove all rights from 'others'
	setfacl -bR OnTopic/			# remove all existing ACLs
	setfacl -bR Personal/			# remove all existing ACLs
	setfacl -R -m d:g::rwX OnTopic/		# set correct group effective rights
	setfacl -R -m d:g::rwX Personal/	# set correct group effective rights