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Linux Jedi Mind Tricks

Linux Novice - Someone who wonders what RTFM means.
Linux User - Someone who has tried to RTFM.
Windows User - Someone who has never heard RTFM.
Linux Guru - Someone who doesn't need to RTFM.
Linux Hacker - Someone who knows what isn't in TFM.
Linux Jedi - The one who WTFM.

Count processes running as each user:

ps -ef | awk '{print$1}' | sort | uniq -c | sort -nr

Convert GIFs from Twitter that download as MP4s back into uploadable GIFs again

ffmpeg -y -i input.mp4 -filter_complex "scale=320:-1:flags=lanczos[x];[x]split[x1][x2]; [x1]palettegen[p];[x2][p]paletteuse" output.gif

Burn an iso to CD-ROM

wodim -eject -tao speed=0 dev=/dev/sr0 -v -data bmp1.iso

Build an iso image (bmp1.iso) from the contents in a folder (temp)

genisoimage -r -o bmp1.iso temp

Make ISO from temp directory

genisoimage -r -joliet-long -o files1.iso temp

Burn ISO to disk

wodim -eject -tao speed=0 dev=/dev/sr0 -v -data files1.iso

Add line numbers to a file (5 digits, leading zeros, separated by a colon)

nl -i1 -s': ' -nrz -w5 twit3.txt >twit4.txt

Copy command-line output to clipboard

cat spock2.txt | xclip -selection clipboard

Generate a pdf from a man page

man -t vim | ps2pdf - > vim.pdf

Append an asterisk prefix to every line in a file

sed -ne 's/.*/* &/p' enterprise.txt > enterprise2.txt

Rename all files with extension .OUT with the extension .txt

rename 's/\.OUT$/.txt/' *

Extract gzip compressed tar archives

gunzip progs.tar.gz tar xvf progs.tar

Tally up a column of figures

#! /bin/sh
case "$1" in 
[1-9]*) colnum="$1"; shift;; 
*) echo "Usage: `basename $0` colnum [files]" 1>&2; exit 1;; 
esac 
awk '{sum += $col} 
END {print sum}' col=$colnum OFMT='%.2f' ${1+"$@"}

Convert a photo into an ASCII art representation directly into the terminal and save it to photo.ascii at the same time

jp2a Photo.jpg | tee photo.ascii

Change double-spaces in a text file to single spaces

cat redpine.txt | sed 's/ \+/ /g' > redpine2.txt

Delete empty files in and under the current directory

find . -empty -exec rm -f {} \;

Run the last command again as root

sudo !!

Make the text in a file all uppercase

cat testa.txt | tr '[a-z]' '[A-Z]' > testb.txt

Replace spaces in the filename of all the files in a directory with hyphens

find . -name "* *mp3" -exec rename 's/\ /-/g' {} \;

Michael-Neil-&-Graham-Getty---Retrochet-II---01---Cascade-Effect-Part-1.mp3

Convert all your files saved as ".jpg-large" back to ".jpg"

(so Twitter thinks they are images again)

find . -depth -name "*.jpg-large" -exec sh -c 'f="{}"; mv -- "$f" "${f%.jpg-large}.jpg"' \;

Find ten biggest hogs of disk space under a directory

du -s /usr/share/* | sort -nr | head

Prime factors of first 100 integers

echo {1..100} | factor

Make an image of a CD on your hard drive

dd if=/dev/sr0 of=image.iso

Mount that image on your system to use it

(The mount point must already exist)

mount -o loop image.iso /mnt/temp ===

Get a weather forecast for your city

curl wttr.in/seattle

Find files by name

find . -name *wav -print

Get information about all files of a certain type

find . -name *com -exec file {} \;

Print number of processes running as each user

$ ps -ef | awk '{print $1}' | sort | uniq -c

List the misspelled words in a file

enchant -l matthew

Return the name of the most-recently modified file in a directory

$ ls -t | head -1

20190506_061751k2.jpg

Strip blank lines from a text file

awk 'NF > 0' yeshua > yeshua2

Make all filenames in a directory lowercase

#!/bin/bash 
for x in `ls` 
do 
if [ ! -f $x ]; then 
continue 
fi 
lc=`echo $x | tr '[A-Z]' '[a-z]'` 
if [ $lc != $x ]; then 
mv -i $x $lc 
fi 
done

paste into file called lowerit chmod u+x lowerit ./lowerit

Combine two files, line by line, comma delimited

$ paste -d, names.txt distances.txt

Concatenate a group of files into a single new file

for file in *; do cat $file >> linuxgal.txt; done

Find man page for a command

whereis -m genisoimage

genisoimage: /usr/share/man/man1/genisoimage.1.gz

Build a list of unique words in a file

tr ' ' \\n < notes20191108.txt | sort | uniq

Build an iso from a file

genisoimage -r -joliet-long -o -win98tib.iso /home/teresita/Desktop/iso/win98[7]20150529.tib

Burn an iso to a CD-ROM

Make a new .iso image in /mnt/burn from the contents in /mnt/hold

mkisofs -o /mnt/burn/image.iso /mnt/hold

Burn that image to another CD

cdrecord dev=/dev/sr0 /mnt/burn/image.iso

Convert RPM package to DEB package

alien file.rpm

Copy a file

cp INFILE OUTFILE

Add a CD-ROM to your list of repositories.

apt-cdrom -m add

List only non-blank lines in a file

awk 'NF >0' file.txt

Create a custom command to list files

alias l = 'ls -l --color=auto'

Add line numbers to a file

cat -n file.txt

Find text in a file

awk 'chevy' cars.txt

Backup Master Boot Record

dd if=/dev/sda of=MBR.img bs=446 count=1

Make a file lowercase

cat FILE1.TXT | tr '[A-Z]' '[a-z]' > FILE2.TXT

Change the owner of a directory and all its contents

chown -R teresita DIRECTORY

Grab a copy of a website

wget -w9 -r --random-wait -l3 -np -E URL

Display time since boot

uptime

Get the sizes of all subdirectories under a directory

du -sh MYDIR

Display unique lines in a sorted file

uniq <FILE1 >FILE2

Use CUPS printer management system

localhost:631 (in a browser address bar)

MP3 to WAV conversion

madplay --output=wave:OCEANLAB.WAV OCEANLAB.MP3

Convert to OGG

oggenc *

Create a link

ln -s /initrd/mnt/dev_ro2 HOME

Extract tarball

tar -xvf /dev/hda/FILE

Make archive

tar -c DIRECTORY | bzip2 > DIR.TAR.BZ2

Make a file executable for all users

chmod u+x FILE

Turn a directory into a SquashFS file

mksquashfs /tmp/merge PUP_412.SFS

Mount your SquashFS file

mount -o loop -t squashfs PUP_412.SFS /mnt/pup

Upload a file to your webspace

wput MYFILE ftp://username:password@web.host.com

Convert a MIDI file to a .WAV file

timidity -Ow -oRUBY.WAV RUBY.MID

Replace spaces in a filename with hyphens

find . -name "* *mp3" -exec rename 's/\ /-/g' {} \;

Print the current month in Julian dates

cal -j

Make a new file of the individual words in another file

tr ' ' '\012' <INFILE >OUTFILE

or

for WORD in `cat FILE`
do
echo $WORD
done

Strip carriage returns from a DOS file

tr -d '\015' <INFILE >OUTFILE

Downshift all file names

#!/bin/bash
for x in `ls`
do
if [ ! -f $x ]; then
continue
fi
lc=`echo $x  | tr '[A-Z]' '[a-z]'`
if [ $lc != $x ]; then
mv -i $x $lc
fi
done

Rename in bulk

OLD=xxx

NEW=yyy

for F in $OLD*

do

SUFFIX=`expr $F : '$OLD$.*$'`

mv $OLD$SUFFIX $NEW$SUFFIX

done

Install from tarball

tar -zxvf ARCHIVE.TAR.GZ

./configure

Format floppy disk

fdformat /dev/sde

List directories

find . -type d -print

=== Convert avi to mpeg ===

mencoder MOVIE.AVI -of mpeg -mpegopts format=mpeg1:tsaf:muxrate=2000 -o MOVIE.MPG -oac lavc -lavcopts acodec=mp2:abitrate=224 -ovc lavc -lavcopts vcodec=mpeg1video:vbitrate=1152:keyint=15:mbd=2:aspect=4/3

Factorial function implemented by recursion.

define fact(n)

{

if (n <= 1) return (n);

return (n * fact(n-1));

}

Perform a ROT 13 conversion

#!/bin/sh
echo "$1" | tr '[A-Za-z]' '[N-ZA-Mn-za-m]'

Download streaming videos and convert them to MP3s

sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl

sudo chmod a+x /usr/local/bin/youtube-dl

youtube-dl --title --extract-audio --audio-format mp3 https://www.youtube.com/watch?v=L3FmBjX-p0I

Convert decimal to 16 bit binary and trim leading zeros

#! /bin/bash
D2B=({0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1})
echo $((10#${D2B[$1]}))

Send a man page to the terminal minus the embedded backspace characters

man genisoimage | col -b | less

Print the first sixteen binary numbers using awk to align the data

echo "obase=2;i=0;while(i<=15) {i;i+=1}" | bc | awk '{printf "%4s\n", $0}'

TERMINAL CRUISE

A

A0-Z9 20191025 20200123 20200124 20200125

Fm	To	Title	Summary
		1 - Students	Chokhmah discovers sentient life on one of her rocky bodies
		2 - Michael	Chokhmah unites with a human to live among them
		3 - Patriarchs	Melchizedek establishes the knowledge of Chokhmah on Earth
		4 - Trial	Michael is arrested and put on trial for preaching infidelity to the Law of Keter
		5 - Tribes	The covenant people of Chokhmah flourish in Canaan
		6 - Knot	Salem is assailed by armies led by Zadkiel
		7 - Samaria	The northern tribes form a kingdom that flourishes for a time
		8 - Exile	The Fallen Angels leave Salem forever
		9 - Judah	Chokhmah brings Samarian colonists to Heaven while Judah is left behind
		10 - Truce	Lilith and Samael set the frontier between House Larund and House Gerash
		11 - Lael	Lael leads colonists from Judah to Heaven
		12 - Demonstroke	Lilith and Samael pay court to King Uriel of the House of Bellon
		13 - Judea	From the conquest of Nebuchadnezzar to the conquest of Pompey
		14 - Binah	The courtship of Keter and Chokhmah
		15 - Jashen	One of the B'nei Elohim is sent to retrieve the Golden Gift
		16 - Yohanan	Yeshua comes to Yohanan to be baptized
		17 - Ark	Lael's group defends the Ark from a group from the Saiph League who would seize it
		18 - Rumbek	Michael, Lilith, and Leliel come before King Metatron in Rumbek
		19 - Anshar	Yeshua and Belial have a brief encounter in the land of Anshar
		20 - Roshites	Gabriel and Remiel defend the Remnant from a force led by Belphegor
		21 - Arrival	The nobles attending the Council of Royals in Rumbek begin to arrive
		22 - Yeshua	Yeshua assumes leadership of Yohanan's group of disciples, and takes on more.

D

Fm	To	Title	Summary
DAA	DZZ	TC-Council	The kingdoms of Heaven lay out their grievances
DAA	DZZ	TC-Interlude
DAA	DZZ	TC-Risen
DAA	DZZ	TC-Elamites
DAA	DZZ	TC-Union
DAA	DZZ	TC-Way

E

Fm	To	Title	Summary
EAA	EDH	E1	.
EEA	EHH	E2
EIA	EEE	E3
EEA	IEE	E4
EAA	EEE	E5
EAA	IEEE	E6
EAA	EEE	E7

F

Fm	Fo	FitlF
FAA	FDH	F1
FFA	FHH	F2
FIA	FFF	F3
FFA	IFF	F4
FAA	FFF	F5
FAA	IFFF	F6
FAA	FFF	F7

G

Fm	To	Title	Summary
GAA	GCE	Kuwapi	Wanica receives the Golden Gift
GDA	GEY	Lange	Pastor Lange leads a schism of the Dunkers
GFA	GHN	Nyduly	Shy Bear and Mark Lange meet Yeshua in Nyduly Wood
GIA	GJW	Chief	The Kuwapi people have a change in leadership

H

Fm	To	Title	Summary
HAA	HBX	Band	The earliest days of Kim, Sophie, Dory, and Gabriel
HCA	HDJ	Attic	Pastor Lange leads a schism of the Dunkers
HEA	HFQ	Clinic	Kim and Sofie are trapped in DECON quarantine
HGA	HHC	Cartel	Gabriel escapes the draft
HIA	HIU	Kaneko	Kim and Sophie plot to escape the internment camp
HJA	HLA	Train	Kim and Sophie are rescued by Peter, Gabriel, and Dory
HMA	HNS	Cable	Kim joins Yeshua on a side trip and is bifurcated

I

Fm	To	Title
IAA	IDH	Kim
IEA	IHH	Felt
IIA	IJE	Porter
IKA	ILE	Search
IAA	IZZ	TC-Roswell
IAA	IZZ	TC-Greenrock
IAA	IZZ	TC-YomKippur

J

Fm	To	Title
JAA	JDF	Judith
JEA	JHH	J2
JIA	JJE	J3
JKA	ILE	J4
JAA	JZZ	J5
JAA	IJZZ	J6
JAA	JZZ	J7

K

Fm	To	Title	Summary
KAA	KBZ	Underground	The Red Wing migrates out of state. Robyn gives birth to Ariel.
KEA	KHH	K2
KIA	KKE	K3
KKA	ILE	K4
KAA	KZZ	K5
KAA	IKZZ	K6
KAA	KZZ	K7

L

Fm	To	Title	Summary
LAA	LAZ	David	David Morrich survives the nuclear attack on the American capital
LBA	LBZ	Amanda	Dr. Amanda Chase joins DECON to research the B'nei Elohim
LIA	LLE	Brains	Earl Roland and Ian Trochmann show Amanda evidence of White Brain Disease
LLA	ILE	Checkup	Amanda meets Judith Gervasi
LAA	LZZ	L5
LAA	ILZZ	L6
LAA	LZZ	L7

M

Fm	To	Title
MAA	MDH	M1
MEA	MHH	M2
MIA	MME	M3
MMA	IME	M4
MAA	MZZ	M5
MAA	IMZZ	M6
MAA	MZZ	M7

N

Fm	To	Title
NAA	NDH	N1
NEA	NHH	N2
NIA	NNE	N3
NNA	INE	N4
NAA	NZZ	N5
NAA	INZZ	N6
NAA	NZZ	N7

O

Fm	To	Title
OAA	ODH	O1
OEA	OHH	O2
OIA	OOE	O3
OOA	IOE	O4
OAA	OZZ	O5
OAA	IOZZ	O6
OAA	OZZ	O7

P

Fm	To	Title
PAA	PDH	P1
PEA	PHH	P2
PIA	PPE	P3
PPA	IPE	P4
PAA	PZZ	P5
PAA	IPZZ	P6
PAA	PZZ	P7

Q

Fm	To	Title
QAA	QDH	Q1
QEA	QHH	Q2
QIA	QQE	Q3
QQA	IQE	Q4
QAA	QZZ	Q5
QAA	IQZZ	Q6
QAA	QZZ	Q7

R

Fm	To	Title
RAA	RDH	R1
REA	RHH	R2
RIA	RRE	R3
RRA	IRE	R4
RAA	RZZ	R5
RAA	IRZZ	R6
RAA	RZZ	R7

S

Fm	To	Title
SAA	SDH	S1
SEA	SHH	S2
SIA	SSE	S3
SSA	ISE	S4
SAA	SZZ	S5
SAA	ISZZ	S6
SAA	SZZ	S7

T

Fm	To	Title
TAA	TDH	T1
TEA	THH	T2
TIA	TTE	T3
TTA	ITE	T4
TAA	TZZ	T5
TAA	ITZZ	T6
TAA	TZZ	T7

U

Fm	Uo	Uitle
UAA	UDH	U1
UEA	UHH	U2
UIA	UUE	U3
UUA	IUE	U4
UAA	UZZ	U5
UAA	IUZZ	U6
UAA	UZZ	U7

V

Fm	Vo	Vitle
VAA	VDH	V1
VEA	VHH	V2
VIA	VVE	V3
VVA	IVE	V4
VAA	VZZ	V5
VAA	IVZZ	V6
VAA	VZZ	V7

W

Fm	Wo	Witle
WAA	WDH	W1
WEA	WHH	W2
WIA	WWE	W3
WWA	IWE	W4
WAA	WZZ	W5
WAA	IWZZ	W6
WAA	WZZ	W7

X

Fm	Xo	Xitle
XAA	XDH	X1
XEA	XHH	X2
XIA	XXE	X3
XXA	IXE	X4
XAA	XZZ	X5
XAA	IXZZ	X6
XAA	XZZ	X7

Y

Fm	Yo	Yitle
YAA	YDH	Y1
YEA	YHH	Y2
YIA	YYE	Y3
YYA	IYE	Y4
YAA	YZZ	Y5
YAA	IYZZ	Y6
YAA	YZZ	Y7

Z

Fm	Zo	Zitle
ZAA	ZDH	Z1
ZEA	ZHH	Z2
ZIA	ZZE	Z3
ZZA	IZE	Z4
ZAA	ZZZ	Z5
ZAA	IZZZ	Z6
ZAA	ZZZ	Z7