#unixshell — Public Fediverse posts

#IT #Geek #GeekyMeme #UNIX #Linux #Mac #MacOS #BSD #Bash #ZSH #Shell #ShellScript #UnixShell #LinuxShell #CLI #CommandLine #CMD.

#Meme #Memes #Humour #Humor

#IT #Geek #GeekyMeme #UNIX #Linux #Mac #MacOS #BSD #Bash #ZSH #Shell #ShellScript #UnixShell #LinuxShell #CLI #CommandLine #CMD.

#Meme #Memes #Humour #Humor

#IT #Geek #GeekyMeme #UNIX #Linux #Mac #MacOS #BSD #Bash #ZSH #Shell #ShellScript #UnixShell #LinuxShell #CLI #CommandLine #CMD.

#Meme #Memes #Humour #Humor

#IT #Geek #GeekyMeme #UNIX #Linux #Mac #MacOS #BSD #Bash #ZSH #Shell #ShellScript #UnixShell #LinuxShell #CLI #CommandLine #CMD.

#Meme #Memes #Humour #Humor

Wrote a #shell function without using ls inside of $( ), so my inner @mirabilos won't harass me. XD

#slightly easier wireguard command
function wg {
    local dir file profile profiledir= parm=${1:-} statustext
    #Find profile dir
    for dir in {,/usr/local}/etc/wireguard; do
        if [[ -d $dir ]]; then
            profiledir=$dir
            break
        fi
    done
    #Find config file
    if [[ -n $profiledir ]]; then
        for file in $profiledir/*.conf; do
            if [[ -e $file ]]; then
                profile=${file//*\/}
                profile=${profile/.conf}
                break
            fi
        done
    fi
    [[ -n $profile ]] || profile=proton
    statustext="wireguard profile $profile"
    case ${parm,,} in
        up|on)      doas wg-quick  up  $profile;;
        down|off)   doas wg-quick down $profile;;
        status)     echo -en "$statustext _______\r"
                    echo -en "$statustext "
                    ifconfig |grep -q "^$profile:" && echo enabled || echo disabled;;
        *)          warn "wg usage: wg up|down|status";;
    esac
}

Hmm, seems ${foo,,} for lower case conversion is #bash-only. I wonder if I should use tr instead.

#Unix #UnixShell #ShellScript #ShellScripting

Wrote a #shell function without using ls inside of $( ), so my inner @mirabilos won't harass me. XD

#slightly easier wireguard command
function wg {
    local dir file profile profiledir= parm=${1:-} statustext
    #Find profile dir
    for dir in {,/usr/local}/etc/wireguard; do
        if [[ -d $dir ]]; then
            profiledir=$dir
            break
        fi
    done
    #Find config file
    if [[ -n $profiledir ]]; then
        for file in $profiledir/*.conf; do
            if [[ -e $file ]]; then
                profile=${file//*\/}
                profile=${profile/.conf}
                break
            fi
        done
    fi
    [[ -n $profile ]] || profile=proton
    statustext="wireguard profile $profile"
    case ${parm,,} in
        up|on)      doas wg-quick  up  $profile;;
        down|off)   doas wg-quick down $profile;;
        status)     echo -en "$statustext _______\r"
                    echo -en "$statustext "
                    ifconfig |grep -q "^$profile:" && echo enabled || echo disabled;;
        *)          warn "wg usage: wg up|down|status";;
    esac
}

Hmm, seems ${foo,,} for lower case conversion is #bash-only. I wonder if I should use tr instead.

#Unix #UnixShell #ShellScript #ShellScripting

Wrote a #shell function without using ls inside of $( ), so my inner @mirabilos won't harass me. XD

#slightly easier wireguard command
function wg {
    local dir file profile profiledir= parm=${1:-} statustext
    #Find profile dir
    for dir in {,/usr/local}/etc/wireguard; do
        if [[ -d $dir ]]; then
            profiledir=$dir
            break
        fi
    done
    #Find config file
    if [[ -n $profiledir ]]; then
        for file in $profiledir/*.conf; do
            if [[ -e $file ]]; then
                profile=${file//*\/}
                profile=${profile/.conf}
                break
            fi
        done
    fi
    [[ -n $profile ]] || profile=proton
    statustext="wireguard profile $profile"
    case ${parm,,} in
        up|on)      doas wg-quick  up  $profile;;
        down|off)   doas wg-quick down $profile;;
        status)     echo -en "$statustext _______\r"
                    echo -en "$statustext "
                    ifconfig |grep -q "^$profile:" && echo enabled || echo disabled;;
        *)          warn "wg usage: wg up|down|status";;
    esac
}

Hmm, seems ${foo,,} for lower case conversion is #bash-only. I wonder if I should use tr instead.

#Unix #UnixShell #ShellScript #ShellScripting

Wrote a #shell function without using ls inside of $( ), so my inner @mirabilos won't harass me. XD

#slightly easier wireguard command
function wg {
    local dir file profile profiledir= parm=${1:-} statustext
    #Find profile dir
    for dir in {,/usr/local}/etc/wireguard; do
        if [[ -d $dir ]]; then
            profiledir=$dir
            break
        fi
    done
    #Find config file
    if [[ -n $profiledir ]]; then
        for file in $profiledir/*.conf; do
            if [[ -e $file ]]; then
                profile=${file//*\/}
                profile=${profile/.conf}
                break
            fi
        done
    fi
    [[ -n $profile ]] || profile=proton
    statustext="wireguard profile $profile"
    case ${parm,,} in
        up|on)      doas wg-quick  up  $profile;;
        down|off)   doas wg-quick down $profile;;
        status)     echo -en "$statustext _______\r"
                    echo -en "$statustext "
                    ifconfig |grep -q "^$profile:" && echo enabled || echo disabled;;
        *)          warn "wg usage: wg up|down|status";;
    esac
}

Hmm, seems ${foo,,} for lower case conversion is #bash-only. I wonder if I should use tr instead.

#Unix #UnixShell #ShellScript #ShellScripting

Wrote a #shell function without using ls inside of $( ), so my inner @mirabilos won't harass me. XD

#slightly easier wireguard command
function wg {
    local dir file profile profiledir= parm=${1:-} statustext
    #Find profile dir
    for dir in {,/usr/local}/etc/wireguard; do
        if [[ -d $dir ]]; then
            profiledir=$dir
            break
        fi
    done
    #Find config file
    if [[ -n $profiledir ]]; then
        for file in $profiledir/*.conf; do
            if [[ -e $file ]]; then
                profile=${file//*\/}
                profile=${profile/.conf}
                break
            fi
        done
    fi
    [[ -n $profile ]] || profile=proton
    statustext="wireguard profile $profile"
    case ${parm,,} in
        up|on)      doas wg-quick  up  $profile;;
        down|off)   doas wg-quick down $profile;;
        status)     echo -en "$statustext _______\r"
                    echo -en "$statustext "
                    ifconfig |grep -q "^$profile:" && echo enabled || echo disabled;;
        *)          warn "wg usage: wg up|down|status";;
    esac
}

Hmm, seems ${foo,,} for lower case conversion is #bash-only. I wonder if I should use tr instead.

#Unix #UnixShell #ShellScript #ShellScripting

Recursion usually scares me a bit, but it worked out nicely here:

#convert "cx"-style Esperanto notation to native accents (ĉ)
function eaccent {
    if [[ ${1:-} ]]; then
        echo "$*" |eaccent
    else
        sed 's/cx/ĉ/g; s/gx/ĝ/g; s/hx/ĥ/g; s/jx/ĵ/g; s/sx/ŝ/g; s/ux/ŭ/g; s/C[xX]/Ĉ/g; s/G[xX]/Ĝ/g; s/H[xX]/Ĥ/g; s/J[xX]/Ĵ/g; s/S[xX]/Ŝ/g; s/U[xX]/Ŭ/g'
    fi
}

#bash #unix #shell #scripts #scripting #UnixShell #ShellScripting #Esperanto

Recursion usually scares me a bit, but it worked out nicely here:

#convert "cx"-style Esperanto notation to native accents (ĉ)
function eaccent {
    if [[ ${1:-} ]]; then
        echo "$*" |eaccent
    else
        sed 's/cx/ĉ/g; s/gx/ĝ/g; s/hx/ĥ/g; s/jx/ĵ/g; s/sx/ŝ/g; s/ux/ŭ/g; s/C[xX]/Ĉ/g; s/G[xX]/Ĝ/g; s/H[xX]/Ĥ/g; s/J[xX]/Ĵ/g; s/S[xX]/Ŝ/g; s/U[xX]/Ŭ/g'
    fi
}

#bash #unix #shell #scripts #scripting #UnixShell #ShellScripting #Esperanto

Recursion usually scares me a bit, but it worked out nicely here:

#convert "cx"-style Esperanto notation to native accents (ĉ)
function eaccent {
    if [[ ${1:-} ]]; then
        echo "$*" |eaccent
    else
        sed 's/cx/ĉ/g; s/gx/ĝ/g; s/hx/ĥ/g; s/jx/ĵ/g; s/sx/ŝ/g; s/ux/ŭ/g; s/C[xX]/Ĉ/g; s/G[xX]/Ĝ/g; s/H[xX]/Ĥ/g; s/J[xX]/Ĵ/g; s/S[xX]/Ŝ/g; s/U[xX]/Ŭ/g'
    fi
}

#bash #unix #shell #scripts #scripting #UnixShell #ShellScripting #Esperanto

Recursion usually scares me a bit, but it worked out nicely here:

#convert "cx"-style Esperanto notation to native accents (ĉ)
function eaccent {
    if [[ ${1:-} ]]; then
        echo "$*" |eaccent
    else
        sed 's/cx/ĉ/g; s/gx/ĝ/g; s/hx/ĥ/g; s/jx/ĵ/g; s/sx/ŝ/g; s/ux/ŭ/g; s/C[xX]/Ĉ/g; s/G[xX]/Ĝ/g; s/H[xX]/Ĥ/g; s/J[xX]/Ĵ/g; s/S[xX]/Ŝ/g; s/U[xX]/Ŭ/g'
    fi
}

#bash #unix #shell #scripts #scripting #UnixShell #ShellScripting #Esperanto

Recursion usually scares me a bit, but it worked out nicely here:

#convert "cx"-style Esperanto notation to native accents (ĉ)
function eaccent {
    if [[ ${1:-} ]]; then
        echo "$*" |eaccent
    else
        sed 's/cx/ĉ/g; s/gx/ĝ/g; s/hx/ĥ/g; s/jx/ĵ/g; s/sx/ŝ/g; s/ux/ŭ/g; s/C[xX]/Ĉ/g; s/G[xX]/Ĝ/g; s/H[xX]/Ĥ/g; s/J[xX]/Ĵ/g; s/S[xX]/Ŝ/g; s/U[xX]/Ŭ/g'
    fi
}

#bash #unix #shell #scripts #scripting #UnixShell #ShellScripting #Esperanto

When you're dealing with plaintext data in a suspicious context, consider using `cat -v` where you'd usually use `cat`.

```
-v, --show-nonprinting
use ^ and M- notation, except for LFD and TAB
```

#UnixShell #commandLine #Linux #LinuxTips #cybersecurity

P.S., the body of the parent #toot was created by a simple #shell #function:

function apod {
    #Today's NASA Astronomy Picture of the Day info-fetcher
    curl -sL 'https://apod.nasa.gov/apod/archivepix.html' \
        |grep -m1 "[0-9][0-9]:" \
        |sed 's/^/Date: /;
            s|: *<a href="|\nURL: https://apod.nasa.gov/apod/|;
            s/">/\nTitle: /; s/<.*$//'
    echo
    echo "#NASA #Astronomy #PictureOfTheDay"
}

#bash #ksh #mksh #shellScripting #unix #UnixShell #WebScraping #Scraping #HTML

Rule/Yule 30 cellular automaton with a "band-pass" filter every few iterations. Done in the Bash shell using bitwise math, so each row/state is a single number of 63 bits.

#cellularautomata #cellularautomaton #rule30 #bitwiseoperators #textmode #textmodeart #oldskool #retrocomputing #unixshell #shellprogramming #xterm #joulu6 #xmastree #algorithmicart #algorist #mathart #laskutaide #ittaide #kuavataide #iterati

Rule/Yule 30 cellular automaton with a "band-pass" filter every few iterations. Done in the Bash shell using bitwise math, so each row/state is a single number of 63 bits.

#cellularautomata #cellularautomaton #rule30 #bitwiseoperators #textmode #textmodeart #oldskool #retrocomputing #unixshell #shellprogramming #xterm #joulu6 #xmastree #algorithmicart #algorist #mathart #laskutaide #ittaide #kuavataide #iterati

Rule/Yule 30 cellular automaton with a "band-pass" filter every few iterations. Done in the Bash shell using bitwise math, so each row/state is a single number of 63 bits.

#cellularautomata #cellularautomaton #rule30 #bitwiseoperators #textmode #textmodeart #oldskool #retrocomputing #unixshell #shellprogramming #xterm #joulu6 #xmastree #algorithmicart #algorist #mathart #laskutaide #ittaide #kuavataide #iterati

Rule/Yule 30 cellular automaton with a "band-pass" filter every few iterations. Done in the Bash shell using bitwise math, so each row/state is a single number of 63 bits.

#cellularautomata #cellularautomaton #rule30 #bitwiseoperators #textmode #textmodeart #oldskool #retrocomputing #unixshell #shellprogramming #xterm #joulu6 #xmastree #algorithmicart #algorist #mathart #laskutaide #ittaide #kuavataide #iterati

Rule/Yule 30 cellular automaton with a "band-pass" filter every few iterations. Done in the Bash shell using bitwise math, so each row/state is a single number of 63 bits.

#cellularautomata #cellularautomaton #rule30 #bitwiseoperators #textmode #textmodeart #oldskool #retrocomputing #unixshell #shellprogramming #xterm #joulu6 #xmastree #algorithmicart #algorist #mathart #laskutaide #ittaide #kuavataide #iterati

In the helpful shell functions department:

(Requires bc to be installed)

load() {
    local load=$(uptime |sed -E "s/^.*load averages?: //; s/,.*$//")
    local uname="$(uname)"
    local cpus
    if [[ $1 == -q ]]; then
        echo "$load"
    elif [[ $1 == -i ]]; then
        echo "$load + 0.5" |bc -l |cut -f1 -d.
    else
        case "$uname" in
            Linux)  cpus=$(grep -c ^processor /proc/cpuinfo);;
            *BSD)   cpus=$(sysctl hw.ncpu |tr -dc "0-9\n");;
            *)      warn "load(): assuming 1 cpu, don't know how to get the number in \"$uname\""
                    cpus=1;;
        esac
        local loadPerCPU=$(echo "scale=3; $load / $cpus" |bc -l |sed 's/^\./0./')
        echo "$load ($loadPerCPU per processor ($cpus))"
    fi
}

#ShellScripting #UnixShell #ShellScripts #bash #ksh #sh

#Poll: Curious about people's attitudes towards shell scripting.

Two part question:

1. Are you a DEVeloper (or working in a development-heavy role), OTHER-IT worker (such as a sysadmin, architect, anything in a non-development-heavy role), or NON-IT (accountant, doctor, whatever)
2. Do you HATE shell scripting, are you INDIFferent towards (or ignorant of) shell scripting, or do you LOVE it?

#Unix #UnixShell #ShellScript #ShellScripting #POSIX #PosixShell #sh #bash #zsh #csh #tcsh #ksh #pdksh #oksh #mksh

I've probably tooted about this before, but I don't know why this isn't standard.

It's just so obvious, at least to me. ;)

~ $ type mcd
mcd is a function
mcd () 
{ 
    [[ -n $1 ]] && mkdir "$1" && cd "$1"
}

#shell #UnixShell #ShellScripting #sh #bash #ksh #mksh

A wild #blog post appears!

I do some benchmarking of #oksh with nine C compilers on #OpenBSD. Nothing conclusive is discovered, but it is nonetheless a very fun journey.

https://briancallahan.net/blog/20211010.html

#Unix #Linux #FreeBSD #NetBSD #DragonFlyBSD #BSD #C #compile #compiler #compilers #shell #unixshell #kornshell #ksh

I've released oksh-7.0 for all your shell needs.

#OpenBSD #FreeBSD #oksh #NetBSD #DragonFlyBSD #Unix #Linux #shell #ksh #KornShell #UnixShell

https://github.com/ibara/oksh/releases/tag/oksh-7.0