Commands by malathion

Commands by malathion (23)

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Get a random quote from Breaking Bad

Hit an API with curl returning a random quote, then parse the result with jq. Show Sample Output
This is sample output - yours may be different.
```
"A guy that clean has to be dirty." -- Hank Schrader
```
5

curl -s https://api.breakingbadquotes.xyz/v1/quotes | jq -r '.[] | "\"\(.quote)\" -- \(.author)"'

malathion · 2024-09-09 14:58:37 62
Get the beats per minute from an audio track

Requires bpm-tools https://www.pogo.org.uk/~mark/bpm-tools/ Show Sample Output
This is sample output - yours may be different.
```
119.900
```
1

ffmpeg -loglevel quiet -i "$AUDIO_FILE" -f f32le -ac 1 -ar 44100 - | bpm

malathion · 2023-09-16 18:55:16 86
Download Video & extract only a specific Time of it

Because this does not download more of the video than necessary, it is faster (especially with long videos).
This is sample output - yours may be different.
6

yt-dlp --external-downloader ffmpeg --external-downloader-args "-ss 00:05:00 -t 00:01:00" "https://www.youtube.com/watch?v=Y6DGABIcB3w"

malathion · 2023-09-16 18:04:12 87
Rotate a video file by 90 degrees CW

Transpose parameter: 0 = 90CounterCLockwise and Vertical Flip (default) 1 = 90Clockwise 2 = 90CounterClockwise 3 = 90Clockwise and Vertical Flip
This is sample output - yours may be different.
-1

ffmpeg -i in.mov -vf "transpose=1" out.mov

malathion · 2019-09-02 04:54:31 890
Convert & rename all filenames to lower case
This is sample output - yours may be different.
1

convmv --lower --notest FILE

malathion · 2019-08-20 05:28:08 1251
Get CPU thermal data on MacOS
This is sample output - yours may be different.
3

sysctl machdep.xcpm.cpu_thermal_level

malathion · 2019-08-19 21:15:07 944
Debug pytest failures in the terminal

pudb is an ncurses debugger. This command will allow interactive debugging of test failures in pytest using pudb.
This is sample output - yours may be different.
1

pytest --pdbcls pudb.debugger:Debugger --pdb --capture=no

malathion · 2019-07-14 02:54:59 44
Get a diff of two json arrays

jq is amazing for manipulating json on the commandline, but the developers have some weird ideas about how to handle shell redirections. This command works around them. Further reading: https://github.com/stedolan/jq/issues/1110
This is sample output - yours may be different.
4

diff <(jq . -M -S < old.json) <(jq . -M -S < new.json)

malathion · 2018-10-11 20:59:48 645
Use jq to validate and pretty-print json output

The `jq` tool can also be used do validate json files and pretty print output: ` jq < file.json` Available on several platforms, including newer debian-based systems via `#sudo apt install jq`, mac via `brew install jq`, and from source https://stedolan.github.io/jq/download/ This alternative to the original avoids the useless use of cat Show Sample Output
This is sample output - yours may be different.
```
success:
{
  "foo": "bar"
}

error:
$ jq < file.json
parse error: Unmatched '}' at line 1, column 15
```
1

jq < file.json

malathion · 2018-10-03 18:46:46 645
Get the current epoch in base32
This is sample output - yours may be different.
0

obase=16; echo "$(date +%s)" | bc | xxd -r -p | base32

malathion · 2017-06-26 16:58:38 22

echo "http://commandlinefu.com" | curl -F-=\<- qrenco.de

malathion · 2017-06-22 22:27:16 19

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.
This is sample output - yours may be different.
4

python -c "import csv,json;print json.dumps(list(csv.reader(open('csv_file.csv'))))"

malathion · 2017-05-17 19:35:53 39
Runs previous command but replacing

Replaces the first instance of 'foo' with 'bar'. To replace all instances of 'foo' with 'bar': !!:gs/foo/bar/
This is sample output - yours may be different.
5

!!:s/foo/bar/

malathion · 2016-07-25 18:52:42 16
Optimal way of deleting huge numbers of files

This command works by rsyncing the target directory (containing the files you want to delete) with an empty directory. The '--delete' switch instructs rsync to remove files that are not present in the source directory. Since there are no files there, all the files will be deleted. I'm not clear on why it's faster than 'find -delete', but it is. Benchmarks here: https://web.archive.org/web/20130929001850/http://linuxnote.net/jianingy/en/linux/a-fast-way-to-remove-huge-number-of-files.html
This is sample output - yours may be different.
11

rsync -a --delete empty-dir/ target-dir/

malathion · 2016-06-07 16:56:55 19
Check your bash shell for vulnerability to the ShellShock exploit

If this command prints 'x' then your shell is vulnerable. Null output confirms that you are protected. Further reading: http://allanmcrae.com/2014/09/shellshock-and-arch-linux/ Show Sample Output
This is sample output - yours may be different.
```
x
```
3

x="() { :; }; echo x" bash -c :

malathion · 2014-12-08 22:21:18 9
Send a file to a pastebin from STDIN or a file, with a single function

echo "Hello world!" | sprunge # Redirect a stream to a pastebin sprunge ~/.bashrc # Send a file to a pastebin
This is sample output - yours may be different.
2

sprunge() { curl -F 'sprunge=<-' http://sprunge.us < "${1:-/dev/stdin}"; }

malathion · 2014-08-26 17:47:31 16
Convert PDF to JPG

Without the bashisms and unnecessary sed dependency. Substitutions quoted so that filenames with whitespace will be handled correctly.
This is sample output - yours may be different.
4

for file in *.pdf; do convert -verbose -colorspace RGB -resize 800 -interlace none -density 300 -quality 80 "$file" "${file//.pdf/.jpg}"; done

malathion · 2014-06-19 15:52:42 8
Securely destroy data on given device hugely faster than /dev/urandom

This command generates a pseudo-random data stream using aes-256-ctr with a seed set by /dev/urandom. Redirect to a block device for secure data scrambling.
This is sample output - yours may be different.
4

openssl enc -aes-256-ctr -pass pass:"$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64)" -nosalt < /dev/zero > randomfile.bin

malathion · 2014-06-02 18:12:54 11
Get a PostgreSQL servers version

Without using a pipe. -X ignores the user's .psqlrc configuration file -A sets un-aligned table output mode -t prints rows only (no headers or footers) Show Sample Output
This is sample output - yours may be different.
```
PostgreSQL 9.3.4 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.8.2 20140206 (prerelease), 64-bit
```
0

psql -X -A -t -c "SELECT version();"

malathion · 2014-05-01 18:10:20 8
List files that are not owned by any installed package

In this example I am returning all the files in /usr/bin that weren't put there by pacman, so that they can be moved to /usr/local/bin where they (most likely) belong. Show Sample Output
This is sample output - yours may be different.
```
/usr/bin/archnews
/usr/bin/evhz
/usr/bin/pager
/usr/bin/pinentry-ncurses
/usr/bin/shortping
/usr/bin/showcolors
/usr/bin/xlock
```
0

for file in /usr/bin/*; do pacman -Qo "$file" &> /dev/null || echo "$file"; done

malathion · 2014-04-22 21:57:08 12
Print average GPU core temperature
This is sample output - yours may be different.
2

nvidia-settings -q gpucoretemp -t | awk '{s+=$1}END{print s/NR}' RS=" "

malathion · 2014-01-16 17:24:09 16

Use curl with a local SOCKS5 proxy (e.g. Tor)

Routes curl input through a local SOCKS5 proxy; in this case, anonymizes curl activity via The Onion Router (Tor) proxy running locally. Note that the traffic will be anonymized, but it will NOT be encrypted, so your traffic will be very vulnerable to man-in-the-middle attacks. Show Sample Output

turl(){ curl --socks5-hostname localhost:9050 $@ ; }

malathion · 2013-07-12 17:09:16 9

Print a list of all hardlinks in the working directory, recursively

libpurple likes to hardlink files repeatedly. To ignore libpurple, use sed: | sed '/\.\/\.purple/d' Show Sample Output
This is sample output - yours may be different.
```
./.bash_logout
./.bash_styles
./.dir_colors
./dotfiles/home/.bash_logout
./dotfiles/home/.bash_styles
./dotfiles/home/.dir_colors
./dotfiles/home/.gitignore_global
./dotfiles/home/.nvidia-settings-rc
./dotfiles/home/.taskrc
./dotfiles/showcolors
./.dropbox-dist/dropbox
./.dropbox-dist/library.zip
./.gitignore_global
./.nvidia-settings-rc
./.taskrc
```
1

find . -type f -a \! -links 1

malathion · 2013-05-06 20:44:08 14

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Video Google download

Download google video with wget. Or, if you wish, pass video URL to ie mplayer to view as stream. 1. VURL: replace with url. I.e. http://video.google.com/videoplay?docid=12312312312312313# 2. OUPUT_FILE : optionally change to a more suited name. This is the downloaded file. I.e. foo.flv # Improvements greatly appreciated. (close to my first linux command after ls -A :) ) Breakedown pipe by pipe: 1. wget: html from google, pass to stdout 2. grep: get the video url until thumbnailUrl (not needed) 3. grep: Strip off everything before http:// 4. sed: urldecode 5. echo: hex escapes 6. sed: stipr of tailing before thumbnailUrl 7. wget: download. Here one could use i.e. mplayer or other...

For a $FILE, extracts the path, filename, filename without extension and extension.

Useful for use in other scripts for renaming, testing for extensions, etc.

Get windows IPv4 and nothing else

May be useful to get user's ip address over the phone, as users struggle to read through a long ipconfig result.

Display which distro is installed

Sort the size usage of a directory tree by gigabytes, kilobytes, megabytes, then bytes.

Probably only works with GNU du and modern perls.

List directories sorted by (human readable) size

Regnerate Exif thumbnail.

split a file by a specific number of lines

Splits the file "my_file" every 500 lines. Will create files called xx01 xx02 and so on. You can change the prefix by using the -f option. Comes in handy for splitting logfiles for example. I am using it for feeding a logfile parser with smaller files instead of one big file (due to performance reasons)

Split File in parts

Split File in 19 MB big parts, putting parts together again via cat Nameforpartaa Nameforpartab Nameforpartac >> File

Extract a IRC like chat log out of an Adium xml logfile

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