Commands by malathion (20)

  • Transpose parameter: 0 = 90CounterCLockwise and Vertical Flip (default) 1 = 90Clockwise 2 = 90CounterClockwise 3 = 90Clockwise and Vertical Flip

    ffmpeg -i -vf "transpose=1"
    malathion · 2019-09-02 04:54:31 3

  • 1
    convmv --lower --notest FILE
    malathion · 2019-08-20 05:28:08 2

  • 2
    sysctl machdep.xcpm.cpu_thermal_level
    malathion · 2019-08-19 21:15:07 2
  • pudb is an ncurses debugger. This command will allow interactive debugging of test failures in pytest using pudb.

    pytest --pdbcls pudb.debugger:Debugger --pdb --capture=no
    malathion · 2019-07-14 02:54:59 1
  • 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:

    diff <(jq . -M -S < old.json) <(jq . -M -S < new.json)
    malathion · 2018-10-11 20:59:48 0
  • 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 This alternative to the original avoids the useless use of cat Show Sample Output

    jq < file.json
    malathion · 2018-10-03 18:46:46 10

  • 0
    obase=16; echo "$(date +%s)" | bc | xxd -r -p | base32
    malathion · 2017-06-26 16:58:38 6

  • 1
    echo "" | curl -F-=\<-
    malathion · 2017-06-22 22:27:16 0
  • Replace 'csv_file.csv' with your filename.

    python -c "import csv,json;print json.dumps(list(csv.reader(open('csv_file.csv'))))"
    malathion · 2017-05-17 19:35:53 1
  • Replaces the first instance of 'foo' with 'bar'. To replace all instances of 'foo' with 'bar': !!:gs/foo/bar/

    malathion · 2016-07-25 18:52:42 0
  • 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:

    rsync -a --delete empty-dir/ target-dir/
    malathion · 2016-06-07 16:56:55 1
  • If this command prints 'x' then your shell is vulnerable. Null output confirms that you are protected. Further reading: Show Sample Output

    x="() { :; }; echo x" bash -c :
    malathion · 2014-12-08 22:21:18 0
  • echo "Hello world!" | sprunge # Redirect a stream to a pastebin sprunge ~/.bashrc # Send a file to a pastebin

    sprunge() { curl -F 'sprunge=<-' < "${1:-/dev/stdin}"; }
    malathion · 2014-08-26 17:47:31 1
  • Without the bashisms and unnecessary sed dependency. Substitutions quoted so that filenames with whitespace will be handled correctly.

    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 0
  • 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.

    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 1
  • 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

    psql -X -A -t -c "SELECT version();"
    malathion · 2014-05-01 18:10:20 1
  • 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

    for file in /usr/bin/*; do pacman -Qo "$file" &> /dev/null || echo "$file"; done
    malathion · 2014-04-22 21:57:08 0

  • 2
    nvidia-settings -q gpucoretemp -t | awk '{s+=$1}END{print s/NR}' RS=" "
    malathion · 2014-01-16 17:24:09 0
  • 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 1
  • libpurple likes to hardlink files repeatedly. To ignore libpurple, use sed: | sed '/\.\/\.purple/d' Show Sample Output

    find . -type f -a \! -links 1
    malathion · 2013-05-06 20:44:08 1

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Open a man page as a PDF in Gnome
Would be better if gnome-open would accept std in Should be doable in KDE - anyone?

Don't save commands in bash history (only for current session)
Unsetting HISTFILE avoid getting current session history list saved.

Quick directory bookmarks
Set a bookmark as normal shell variable $ p=/cumbersome/path/to/project To go there $ to p This saves one "$" and is faster to type ;-) The variable is still useful as such: $ vim $p/ will expand the variable (at least in bash) and show a list of files to edit. If setting the bookmarks is too much typing you could add another function $ bm() { eval $1=$(pwd); } then bookmark the current directory with $ bm p

Checks apache's access_log file, strips the search queries and shoves them up your e-mail
as unixmonkey7109 pointed out, first awk parse replaces three steps.

Create a mirror of a local folder, on a remote server
Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Url Encode
This one uses hex conversion to do the converting and is in shell/sed only (should probably still use the python/perl version).

Last month
Work out last months value

Binary Clock
Binary clock with separate H:M:S.

Lists all usernames in alphabetical order

Perl one-liner to determine number of days since the Unix epoch
There are some environments that use this value for password and account expiration. It's helpful to be able to quickly determine the number of days since the Unix epoch (dse) when working directly with the configuration files as an administrator.

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