Fun way to see the 256 terminal colors:

for x in {0..255}; do printf "\033[1;48;5;%dm%4d\033[0m\n" "${x}" "${x}"; done | column

#Linux #bash

#bash folks, I've got a conundrum.

On some (but not all) of my machines, the date lines in my bash history get tacked onto the end of the commands in the history, but not always. What I mean is, if I run a command like "doas service netif restart" on this machine, then immediately close the terminal, then later on do a search (esc,/ for me, because I use set -o vi), I will get "doas service netif restart" and then several lines of commented date stamps at the end, like this:

rld@Intrepid:~$ doas service netif restart
#logindate=Sun Sep 20 08:38:14 CDT 2026
#logindate=Sun Sep 20 08:41:01 CDT 2026
#logindate=Sun Sep 20 08:41:31 CDT 2026

Here are the pertinent (AFAIK) variables:

rld@Intrepid:~$ grep '^[^#]*HIST[A-Za-z0-9_-]*=' .bash*
.bash_profile:HISTCONTROL=ignoreboth
.bashrc2:export HISTTIMEFORMAT="%F %T " #add a datestamp to the history
.bashrc2:export HISTFILESIZE=-1		#do not truncate
.bashrc2:export HISTSIZE=10000
rld@Intrepid:~$ 

Here's a bigger dump of env vars, if it helps:

rld@Intrepid:~$ set |grep -E '^[A-Z0-9_-]+='
ALIASES_FILE=/home/rld/.bash_aliases
BASH=/usr/local/bin/bash
BASHOPTS=checkjobs:checkwinsize:cmdhist:complete_fullquote:expand_aliases:extglob:extquote:force_fignore:globasciiranges:globskipdots:globstar:histappend:interactive_comments:lastpipe:lithist:login_shell:patsub_replacement:progcomp:promptvars:sourcepath
BASHRC2=true
BASH_ALIASES=()
BASH_ALIASES_FILE=true
BASH_ARGC=([0]="0")
BASH_ARGV=()
BASH_CMDS=()
BASH_COMPLETION_VERSINFO=([0]="2" [1]="17" [2]="0")
BASH_FUNCTIONS_FILE=true
BASH_LINENO=()
BASH_LOADABLES_PATH=/usr/local/lib/bash:/usr/lib/bash:/opt/local/lib/bash:/usr/pkg/lib/bash:/opt/pkg/lib/bash:.
BASH_REMATCH=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="5" [1]="3" [2]="15" [3]="0" [4]="release" [5]="amd64-portbld-freebsd15.0")
BASH_VERSION='5.3.15(0)-release'
BLOCKSIZE=K
BROWSER=librewolf
COLORTERM=true
COLUMNS=111
COMP_FILEDIR_FALLBACK=BASH_COMPLETION_FILEDIR_FALLBACK
COMP_KNOWN_HOSTS_WITH_AVAHI=BASH_COMPLETION_KNOWN_HOSTS_WITH_AVAHI
COMP_KNOWN_HOSTS_WITH_HOSTFILE=BASH_COMPLETION_KNOWN_HOSTS_WITH_HOSTFILE
COMP_WORDBREAKS=$' \t\n"\'><=;|&(:'
DIRSTACK=()
DISPLAY=:0
DMENU_OPTIONS=-i
EDITOR=nvi
EUID=1001
FUNCTIONS_FILE=/home/rld/.bash_functions
GDK_BACKEND=wayland
GROUPS=()
GTK_CSD=0
GTK_OVERLAY_SCROLLING=0
HISTCONTROL=ignoreboth
HISTFILE=/home/rld/.bash_history
HISTFILESIZE=-1
HISTSIZE=10000
HISTTIMEFORMAT='%F %T '
HOME=/home/rld
HOSTNAME=Intrepid
HOSTTYPE=amd64
I3SOCK=/var/run/xdg/rld/sway-ipc.1001.40558.sock
IFS=$' \t\n'
LANG=en_US.UTF-8
LC_ALL=en_US.UTF-8
LESS='-iXFR --wordwrap'
LINES=26
LOGNAME=rld
MACHTYPE=amd64-portbld-freebsd15.0
MAIL=/var/mail/rld
MAILCHECK=60
MANPATH=/home/rld/.local/man:/home/rld/.local/share/man:/usr/local/lib/perl5/site_perl/man:/usr/local/lib/perl5/5.42/perl/man:/usr/local/share/man:/usr/share/man:/usr/share/openssl/man:/home/rld/.local/pipx/venvs/yt-dlp/share/man
MM_CHARSET=UTF-8
MOZ_ENABLE_WAYLAND=1
MOZ_WEBRENDER=1
OLDPWD=/home/rld/working
OPTERR=1
OPTIND=1
OSTYPE=freebsd15.0
PAGER='less -iX'
PATH='/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/sbin:/usr/local/bin:/home/rld/bin:~/.local/bin:/home/rld/go/bin:/home/rld/.local/bin'
PIPESTATUS=([0]="0" [1]="0" [2]="0")
PPID=63829
PPNAME=foot
PS1='\[\e]0;\u@\h: \W\a\]\[\033[1;38;5;22m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\W\[\033[00m\]$ '
PS2='> '
PS4='+ '
PWD=/home/rld
SHELL=/usr/local/bin/bash
SHELLOPTS=braceexpand:hashall:histexpand:history:interactive-comments:monitor:vi
SHELL_PPID=63829
SHLVL=1
SWAYSOCK=/var/run/xdg/rld/sway-ipc.1001.40558.sock
TERM=foot
TERMINFO=/usr/local/share/site-terminfo
TEXTBROWSER=cha
TMPDIR=/tmp/rld
UID=1001
USER=rld
UXN_ROMS_DIR=/home/rld/Documents/uxn-roms
VISUAL=nvi
WAYLAND_DISPLAY=wayland-1
XCURSOR_SIZE=29
XCURSOR_THEME=Adwaita
XDG_CURRENT_DESKTOP=sway
XDG_DATA_DIRS=
XDG_PICTURES_DIR=/home/rld/Pictures
XDG_RUNTIME_DIR=/var/run/xdg/rld
XDG_SCREENSHOTS_DIR=/home/rld/Pictures
XDG_SESSION_TYPE=wayland
_=.bashrc2
_JAVA_AWT_WM_NONREPARENTING=1
__ZFS_CMD=/sbin/zfs
__ZPOOL_CMD=/sbin/zpool

#unix #shell #UnixShell

New #blog #post: Gratitude Day 19: UNIX Shell

https://rldane.space/gratitude-day-19-unix-shell.html

1228 words? Maybe? I dunno.

Umm, I didn't sleep well, so my apologies if this one is kind of confusing, rambly, and info-dumpy. 😁

cc: my wonderful #chorus: @joel @dm @sotolf @thedoctor @pixx @orbitalmartian @adamsdesk @krafter @roguefoam @clayton @giantspacesquid @stfn @golemwire

(I will happily add/remove you from the chorus upon request! :)

#rlDaneWriting #blost #SeptemberTheme #SeptemberBloggingTheme #SepThemeBear #SeptemberGratitude #gratitude #thankfulness #unix #linux #bsd #shell #unixShell #POSIX #bash #Scripting

𝗕𝗮𝘀𝗵 𝗴𝘂𝗶𝗱𝗲:

#Bash #Guide

https://thewhale.cc/posts/bash-guide

A guide to learn bash: basic operations, basic shell programming, tricks and debugging.

Alt...

A guide to learn bash: basic operations, basic shell programming, tricks and debugging.

A quick and easy exercise in Unix shell programming with the Bourne-again shell (`bash’).

What does the following do?

function m () { sha256sum "${1:?"?"}" | (read s t && sha256sum * | grep "^${s}") }

There is, of course, at least one more way to do that, perhaps less fancy.

#Bash
#BourneAgainShell
#Unix
#UnixShell

Dateien FAT32 kompatibel umbenennen - Bash-Script

hyperblog.de/hoergen/posts/202…
#demhoergen #hyperblog #bash #script #dateinamen #fat32 #linux #shell

Ein Bash-Skript, das FAT32-ungültige Zeichen in Dateinamen ersetzt, Steuerzeichen entfernt und Kollisionen vermeidet - z.B. für USB-Sticks, SD-Karten und externe Festplatten.

Alt...

Symbolbild - Computer mit usb Stick & SD Karte

𝗕𝗮𝘀𝗵 𝗴𝘂𝗶𝗱𝗲:

#Bash #Guide

https://thewhale.cc/posts/bash-guide

A guide to learn bash: basic operations, basic shell programming, tricks and debugging.

Alt...

A guide to learn bash: basic operations, basic shell programming, tricks and debugging.

This was invented for #AI. However, I'm finding it really nice for screen readers:
RTK rewrites output from chatty terminal commands that produce a lot of output, often in complex tables, in order to make the output 80 to 90 percent shorter. Just put rtk in front of the command you want to compress. So "rtk git status" instead of "git status". And you can be sure the compacted output is correct because it's just using regular expressions and deterministic rules under the hood to rewrite output from the tools it knows about. If it doesn't know about a particular command, it just passes the output on unchanged.
github.com/rtk-ai/rtk
Now I've got to figure out how to wire this up in #bash so it'll just happen without me typing rtk all the time.

#a11y #screenreader #accessibility #commandline

LOL, recursive script and sed = clobbered myself, ha ha. Who needs a malicious AI when you have a defective brain-to-fingers interface? 🤪 #bash

Decades-Old #Bash Tricks Expose #AI Coding Agents to Supply Chain Attacks

https://www.securityweek.com/decades-old-bash-tricks-expose-ai-coding-agents-to-supply-chain-attacks/

#cybersecurity

Thinking of introducing DuckDuckGo AI CLI into my minimalist bashcore CLI distros 🐧

​I know, adding cloud AI to a sec-focused distro is controversial. But thanks to DDG's proxy, IP addresses are stripped for maximum privacy.

​"That's one small step for a dev, one giant leap for CLI-kind"? 🌕🚀

​What do my fellow linux friends think about this big step? Worth it?

#SysAdmin #Privacy #AI #CLI #Bash #Distro #Infosec #DevOps #Linux

Here is a "sketch of concept".
I am not satisfied with it, but it may be better than nothing.
(Relying on a DEBUG trap isn't really a good thing here, in my view.)

(1) Example transcript:

$ echo hello
hello
Ready(0); E=0.00 s 10:21:42
$ sleep 1.5
Ready(0); E=1.50 s 10:22:06
$
Ready(0); E=1.50 s 10:22:07
$ false | sleep 3.456
Ready(1 0); E=3.46 s 10:22:47
$
Ready(1 0); E=3.46 s 10:22:50
$ :
Ready(0); E=0.00 s 10:22:55
$
Ready(0); E=0.00 s 10:23:01

(2) Bash source for the above:

### Print the elapsed time for the previous command before each bash prompt.
### Uses a DEBUG trap and the PROMPT_COMMAND variable.

prompt__elapsed_time=""; #Keeping state.

function prompt__print_prompt () {
declare -r s="${PIPESTATUS[*]}";
if [[ "${prompt__elapsed_time}" == "" ]]; then
## The prompt does not change on just pressing Return (no command).
prompt__elapsed_time="$(printf '%s - %s\n' "${EPOCHREALTIME}" "${prompt__start_time}" | bc)";
fi;
## Imitate IBM z/VM's CMS (partly: the latter prints user time and system time):
printf 'Ready(%s); E=%.2f s %s\n' "${s}" "${prompt__elapsed_time}" "$(date +%H:%M:%S)";
}

function prompt__set_time () {
if [[ "${BASH_COMMAND}" != "prompt__print_prompt" ]]; then
prompt__elapsed_time="";
prompt__start_time=${EPOCHREALTIME};
fi;
}

trap prompt__set_time DEBUG;
PROMPT_COMMAND=prompt__print_prompt;

#bash
#UnixShellProgramming

@rl_dane @dougmerritt @AmenZwa @raven667

I feel a madness slowly creeping into my mind, and it whispers to me,

"Write your own version of the #ed editor in #bash, just for giggles."

NOOOO!! I WILL NOT!!

THERE ARE FOUR LIGHTS!
THERE ARE FOUR LIGHTS!
THERE ARE FOUR LIGHTS!

In the #shell #functions I should have written years ago category...

function fedilinktousername {
    grep -oE 'https?://[^/]+/@[^/ ]+' |sed -E 's|https?://|@|; s|/@|@|; s/(@[^@]*)(@[^@]*)/\2\1/'
}

function fediusernametolink {
    grep -oE '(@[^@ ]+){2}' |sed -E 's|(@[^@ ]+)@([^@ ]+)|https://\2/\1|'
}

rld@Intrepid:~$ clipo
https://polymaths.social/@rl_dane/statuses/01KVJCAG6Y4C1KTGBDBECH2778
rld@Intrepid:~$ clipo |fedilinktousername 
@rl_dane@polymaths.social
rld@Intrepid:~$ clipo |fedilinktousername |fediusernametolink 
https://polymaths.social/@rl_dane
rld@Intrepid:~$ 

#UnixShell #ShellScripting #Unix #bash #ksh

You and me both my internet friend; I've built quite a few interesting sites using pure HTML which have run for years with very little maintenance, due to their almost static nature

@rl_dane

#Firefox #CPU #usage #Dillo #HTML #pure #nostalgia #browser #light #sh #bash

The mistake you maybe making is that you consider Firefox to be a browser.

Firefox has stopped being a browser decades ago

A browser doesn't need hundreds and hundreds of Engineers to be maintained, a massive project with multiple use angles and cases does

Firefox does so many (bad) things you can almost consider it a mini operating system

A alpha level Operating System, riddled with security bugs

It's always fantastic to be able to go somewhere in dillo and just have fun, amazing yourself with a speed that pages load

@rl_dane

#Firefox #CPU #usage #Dillo #browser #light #sh #bash

Seriously, why didn't I put this in my ~/.bashrc like... YEARS ago? 😆

year=$( date +%Y)
month=$(date +%m)
day=$(  date +%d)

#Unix #UnixShell #shell #ShellScripting #bash #bashrc

So I DO love me some python, but I just want to say that #Bash is awesome.

I had no idea this was a thing:

echo "${variable/$inTheString/$replacesIt}"