Command Line Tools

Over the years I’ve developed and polished a number of command line tools, most of which I use on a regular basis. Rather than leave them scattered about, this page lists my most important tools. Each supports all the major operating systems (Linux, Windows, BSD, macOS, etc.) and compiler toolchains (GCC, Clang, MSVC), include complete documentation (man page, etc.), and is readily installed and/or packaged with make install or similar.

On Windows, w64devkit is an ideal development and build environment for these tools.


passphrase2pgp

Derives OpenPGP and SSH keys from a master passphrase, effectively allowing such keys to be memorized. No need to backup your keys, nor store them at rest. Instead, generate keys on the fly as needed.

$ passphrase2pgp -u "Real Name <name@example.com>" | gpg --import
$ passphrase2pgp -u name@example.com -f ssh | ssh-add -

Source: passphrase2pgp-1.2.0.tar.xz (sig)


enchive

Encrypts personal archives for long-term storage and backup. Zero build- nor run-time dependencies, trivially compiled, highly portable. Keys are asymmetric, which is scripting-friendly — a password is never needed to encrypt an archive — and allows less-trusted machines to encrypt files without the ability to decrypt them. Keys are optionally derived from a master passphrase, so they never require backing up.

$ enchive keygen --derive
$ enchive archive --delete backup.tar.gz
$ enchive extract <backup.tar.gz.enchive | gunzip | tar x

Source: enchive-3.5.tar.xz (sig)


hastyhex

Blazing fast hex dumper with color output. Highly portable.

$ hastyhex data.bin | less -R

Source: hastyhex-1.0.0.tar.xz (sig)


cols

Wraps input into columns, automatically adjusting the column width as needed. Fast, resource-efficient and highly portable. On some platforms does not even require a C runtime.

$ seq 60 | cols -CW60
1  4  7  10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58
2  5  8  11 14 17 20 23 26 29 32 35 38 41 44 47 50 53 56 59
3  6  9  12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60

csvquote

Converts CSV to/from a pipeline-friendly format processable by typical unix command line tools. It’s not my original idea, but this is the fastest, leanest, strictest, and most portable implementation.

$ csvquote <data.csv |
      awk -F, '{print $1 "," $2+$3}' |
      csvquote -u >sum.csv

pngattach

Attaches source scripts to PNG images so that they do not become separated. Behaves similar to archival programs like tar. Highly portable, with optional zlib dependency.

$ dot -Tpng graph.dot | pngattach graph.dot >graph.png

prips

Prints ranges of IPv4 addresses like seq. Also supports CIDR notation inputs and outputs. Not my idea, but a much-improved, feature-complete, drop-in clone of the original. This implementation is highly portable, and on some platforms does not even require a C runtime.

$ prips -e ...255 192.168.1.0/24 |
      xargs -n1 -P16 host |
      grep -v NXDOMAIN

race64

High performance base64 encoder and decoder. Compatible with and behaves like a subset of the GNU base64 tool, but faster and far more portable.

$ gzip <data | race64 >data.gz.b64
$ base64 -d data.gz.b64 | gunzip >data

Source: race64-1.0.0.tar.xz (sig)

null program

Chris Wellons

wellons@nullprogram.com (PGP)
~skeeto/public-inbox@lists.sr.ht (view)