Commands using fold sorted by votes

Commands using fold (25)

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This will view the console and assumes the screen is 80 characters wide. Use /dev/vcs2 for the next virtual console.. etc. Show Sample Output

sudo cat /dev/vcs1 | fold -w 80

animoid · 2009-04-15 08:49:48 12

wrap long lines of a text

wraps text lines at the specified width (90 here). -s option is to force to wrap on blank characters -b count bytes instead of columns
This is sample output - yours may be different.
12

fold -s -w 90 file.txt

vincentp · 2009-05-11 23:00:25 11
Wrap text files on the command-line for easy reading

fold wraps text at 80 characters wide, and with the -s flag, only causes wrapping to occur between words rather than through them.
This is sample output - yours may be different.
9

fold -s <filename>

neutral · 2009-02-26 05:06:51 13
generate 30 x 30 matrix

or od /dev/urandom -w60 -An|sed 's/ ..../ /g'|head -n 30 (this one lacks digits 8 and 9)
This is sample output - yours may be different.
6

hexdump -v -e '"%u"' </dev/urandom|fold -60|head -n 30|sed 's/$.\{2\}$/\1 /g'

knoppix5 · 2013-02-16 12:56:24 5
draw honeycomb

tput setaf 1 && tput rev && seq -ws "___|" 81|fold -69|tr "0-9" "_" && tput sgr0 # (brick wall)
This is sample output - yours may be different.
6

seq -ws "\\__/" 99|fold -69|tr "0-9" " "

knoppix5 · 2018-11-13 06:39:37 264
draw honeycomb

Fill the entire terminal screen. Is COLUMNS or LINES are undefined run "resize"
This is sample output - yours may be different.
5

yes "\\__/ " | tr "\n" " " | fold -$((($COLUMNS-3)/6*6+3)) | head -$LINES

tomhol · 2018-11-23 08:21:55 466
Binary clock

Like 7171, but fixed typo, uses fewer variables, and even more cryptic! Show Sample Output
This is sample output - yours may be different.
```
...*
..*.
..**
.*..
```
4

read -a A<<<".*.**..*....*** 8 9 5 10 6 0 2 11 7 4";for C in `date +"%H%M"|fold -w1`;do echo "${A:${A[C+1]}:4}";done

__ · 2010-12-02 22:04:49 5
Break lines after, for example 78 characters, but don't break within a word/string

Per default, linux/unix shells are configured with a width of 80 characters. If you like to edit a phrase or string on a line with more than 80 characters it might take long to go there (for example a line with 1000 characters and you like to edit the 98th word which is character 598-603). Maybe you might wish to use 78 characters, because if you forward the text via mail and the text will be quoted (2 extra characters at the beginning to the line "> "), you use 80 characters, otherwise 82, which are lame.
This is sample output - yours may be different.
3

fold -w 78 -s file-to-wrap

GeckoDH · 2009-05-19 19:33:10 6
Print text string vertically, one character per line.
This is sample output - yours may be different.
3

echo "vertical text" | fold -1

zude · 2009-10-05 23:20:14 4
Binary clock

cryptic version Show Sample Output
This is sample output - yours may be different.
```
...#
..#.
..#.
..##
```
2

read -a A <<<"8 9 5 10 6 0 3 11 7 4";B='.*.**..*....***';for C in $(date +"%H%M"|fold -w1);do echo "${B:${A[C]}:4}";done

unefunge · 2010-11-26 11:29:23 6
Lurk what's going on on remote console
This is sample output - yours may be different.
2

a=$(stty -a -F /dev/tty1| awk -F'[ ;]' '/columns/ { print $9 }'); fold -w$a /dev/vcs1;echo

knoppix5 · 2012-10-19 09:43:14 6
Generate a random password 30 characters long

This command is similar to the alternate, except with head(1), you can pick as many passwords as you wish to generate by changing the number of lines you wish to preview. Show Sample Output
This is sample output - yours may be different.
```
LNukKQoRym5TGKfr1FkkIKX03TcnaV
```
2

strings /dev/urandom | tr -cd '[:alnum:]' | fold -w 30 | head -n 1

atoponce · 2014-12-11 06:21:51 10
Binary search/replace

Replace all instances of "A" with "B" in file "source" saved as file "destination". !! IF A/B is multi-byte, then separate bytes with spaces like so: "s/20\ 0A/00/g". Show Sample Output
This is sample output - yours may be different.
```
 
```
2

xxd -p source | fold -w2 | paste -sd' ' | sed "s/A/B/g" | xxd -p -r > destination

hincor · 2015-05-26 18:29:48 53
draw mesh
This is sample output - yours may be different.
2

seq -s " \\_/" 256|tr -d "0-9"|fold -70

knoppix5 · 2018-11-12 23:25:25 1044
generate random password

generate password Show Sample Output
This is sample output - yours may be different.
```
15fIrGab5C
```
1

cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 10 | sed 1q

gnuyoga · 2009-12-01 09:09:56 8
Generate a random password 30 characters long
This is sample output - yours may be different.
1

tr -cd '[:alnum:]' < /dev/urandom | fold -w30 | head -n1

putnamhill · 2010-09-28 12:25:58 6
Generate a 18 character password, print the password and sha512 salted hash

Generate a 18 character password from character set a-zA-Z0-9 from /dev/urandom, pipe the output to Python which prints the password on standard out and in crypt sha512 form. Show Sample Output
This is sample output - yours may be different.
```
NH6wAL58sKSkqBNUwK
$6$6ZpaL7bakRyXzrpM$TVS4d217.BDjKLEnYkPBtpR8CwXes5HI6U2pcSEoB3x9xUbXVxacEhvlvKFCi4tftwxOJs.Comh7u.GiPvA6X1
```
1

cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 18 | head -1 | python -c "import sys,crypt; stdin=sys.stdin.readline().rstrip('\n'); print stdin;print crypt.crypt(stdin)"

cnyg · 2012-11-09 00:40:22 5
display the hover text of the most recent xkcd

I look at xkcd in my news reader, but it displays the image's title attribute only for a few seconds which makes reading the longer ones more challenging. So I use this to display it in my console.
This is sample output - yours may be different.
1

curl -s 'http://xkcd.com/rss.xml' | xpath '//item[1]/description/text()' 2>&1 | sed -n 's/.*title="$[^"]*$".*/\1/p' | fold -s

putnamhill · 2013-02-16 22:38:26 8
generate 30 x 30 matrix

Replaces hexdump with the more succint xxd, and the sed was unnecessarily complex.
This is sample output - yours may be different.
1

xxd -p /dev/urandom |fold -60|head -30|sed 's/$..$/\1 /g'

psifertex · 2013-02-19 22:18:52 5
Generate password
This is sample output - yours may be different.
1

tr -dc 'A-Za-z0-9!@#$%^&*' < /dev/urandom | fold -w 12 | head -n 1

opexxx · 2013-03-15 13:20:32 84
Wordwrap long text string using "\n"

I used this fragment with Imagemagick convert so that I can place long text strings in pictures. The "\n" gets converted to a true newline in the image. So this fragment uses fold command to wrap the line and then sed to convert newlines (and any trailing spaces on the line) to the text "\n" Show Sample Output
This is sample output - yours may be different.
```
Long Text to be\nwrapped with "\n"
```
1

fold -sw 20 <(echo "Long Text to be wrapped with \"\n\"") |sed ':a;N;$!ba;s/ *\n/\\n/g'

alecthegeek · 2015-04-16 21:06:53 13
yet another random password generator.

this one includes special characters. note some some chars may be disallowed on windows systems. *nix will allow pretty much any character in a password except a carriage return. you do not want non printing characters in your password, so this is limited to the printable chars displayed on a keyboard , less space and return. edited to fix minor typo Show Sample Output
This is sample output - yours may be different.
```
3dV-fcb]t"
```
0

tr -dc '[:print:]' < /dev/urandom | fold -w10 |head -n1 |sed 's/ //g'

wr250 · 2016-01-09 13:43:16 12
Find German synonyms using OpenThesaurus

A function for retrieving and displaying a list of synonyms for a German word or phrase. Show Sample Output
This is sample output - yours may be different.
```
$ desyno Läuterung
Aufbesserung, Aufwertung, Besserung, Läuterung, Melioration, Optimierung, Verbesserung, Verfeinerung, Vervollkommnung, Katharsis, Klärung, Läuterung, Reinigung
$ desyno linux
GNU/Linux, Linux
```
0

desyno(){ wget -q -O- https://www.openthesaurus.de/synonyme/search\?q\="$*"\&format\=text/xml | sed 's/>/>\n/g' | grep "<term term=" | cut -d \' -f 2 | paste -s -d , | sed 's/,/, /g' | fold -s -w $(tput cols); }

lordtoran · 2019-02-09 05:06:42 33
generate random password

no need that useless cat.
This is sample output - yours may be different.
-2

tr -dc 'a-zA-Z0-9' < /dev/urandom | fold -w 10 | sed 1q

unixmonkey7109 · 2009-12-01 11:14:16 5
counting a particular character in a file
This is sample output - yours may be different.
-2

fold -w 1 <file> | grep -c <character>

KeePon · 2010-09-23 16:30:33 4

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Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

How To Get the Apache Document Root

Grabs the Apache config file (yielded from httpd) and returns the path specified as DocumentRoot.

Simulate slow network connection locally

Replace 500ms by the desired delay. To remove it: sudo tc qdisc del dev lo root netem delay 500ms

Stream your desktop to a remote machine.

This allows you to stream your desktop using vlc to another computer, in this case, 192.168.1.2 on your local network. If you have vlc installed, your all set to try this out. To view your own desktop, just run "vlc screen://" For more info, see http://nerdlogger.com/2008/01/08/stream-your-linuxwindowsmac-desktop-as-video-using-vlc/

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

hanukkah colored bash prompt

blue and yellow colored bash prompt for a Hanukkah celebration on your box

List your largest installed packages.

Calculates the size on disk for each package installed on the filesystem (or removed but not purged). This is missing the $ | sort -rn which would put the biggest packges on top. That was purposely left out as the command is slightly on the slow side Also you may need to run this as root as some files can only be checked by du if you can read them ;)

Create QR codes from a URL.

like 7300, but doesn't clutter your working directory with old qr.*.png files. This will get the QR barcode, and send it right into ImageMagick's 'display' tool. Usage is the same as 7300; just call this function followed by the URL: $ qrurl http://xkcd.com

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

take a look to command before action

add |sh when you agree the list, I often use that method to prevent typos in dangerous or long operations

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Commands using fold (25)

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