Script

Sound Selector MacOS

Sound Selector for MacOS

on MacOS, you can switch the input and output source on “system setting/sound”. i’d like todo this on the cli.

SwitchAudio

there is a litte tool called switchaudio. it can list, and also set the input/output device. let’s build a small wrapper around.

brew install switchaudio-osx

Usage

List Sound Devices

stoege@mac ~ % sound.sh

1: Externe Kopfhörer
2: Externes Mikrofon
3: Jabra Link 400
4: Mac mini-Lautsprecher
5: SRS-XB33
6: USB Audio Device

Set Sound Device

Git - Mass Updater

Linux

Intro

Let’s assume you have a bunch of GIT Repos in a Folder like this:

/project1/
    /repo1/
    /repo2/
    /repoN/

and you would like to update all of them ? here a little helper.

  • Loop over all Folders
  • check if ‘.git’ exists
  • if so, do a git pull –all

Script

Copy/Paste it to your Terminal and you get a executable Script called ‘git_update_all.sh’.

cat << 'EOF' > git_update_all.sh
#!/usr/bin/env bash

# Get the current script directory
script_dir=$(dirname "$(readlink -f "$0")")

# Change into each directory in the script folder
for dir in "$script_dir"/*; do

    if [ -d "$dir" ]; then

        cd "$dir" || exit 1

        if [ -d ".git" ]; then

            echo "Updating Git repository in $dir"
            git pull --all

        else

            echo "Skipping $dir - not a Git repository"

        fi

        cd "$script_dir" || exit 1

    fi

done

echo "Git update for all repositories completed."
EOF

# make it executable
chmod u+x git_update_all.sh

Usage

and then run it, like it, use it :)

SOA Checker

OpenBSD

Intro

this is a little script which reads the Name Servers for a given Domain, and then asks the NameServer for the SOA of this Domain.

Script

cat << 'EOF' > soachecker.sh
#!/usr/bin/env bash

# Little SOA & Serial Checker, v0.1, @stoege

tmpfile=$(mktemp)

# Check Args
echo
if [ $# -eq 0 ]; then
  d="stoege.net"
  echo -e "No argument provided. use \033[1m'${d}'\033[0m"
elif [ $# -eq 1 ]; then
  d="$1"
  echo -e "Domain \033[1m'${d}'\033[0m provided"
else
  echo -e "\033[1mmore than one arguments provided. Exit 1.\033[0m"
  exit 1
fi

# Build File
for i in $(dig +short NS ${d} |tr '\n' ' '); do
  echo -e "\ndig +short SOA \033[1m@${i}\033[0m ${d}"
  dig +short SOA @${i} ${d} |tee -a ${tmpfile}
done

# uniq & count
echo
cat ${tmpfile} |sort |uniq -c |awk '{ printf "%d x Serial: %s\n", $1,$4 }'

# cleanup
rm ${tmpfile}

echo
exit 0
EOF
chmod u+x soachecker.sh

Run it

$ ./soachecker.sh stoege.net

Domain 'stoege.net' provided

echo dig +short SOA @ns3.noflow.ch. stoege.net
ns1.noflow.ch. hostmaster.noflow.ch. 2023050124 3600 900 1209600 1800

echo dig +short SOA @ns1.noflow.ch. stoege.net
ns1.noflow.ch. hostmaster.noflow.ch. 2023050124 3600 900 1209600 1800

echo dig +short SOA @ns2.nolink.ch. stoege.net
ns1.noflow.ch. hostmaster.noflow.ch. 2023050124 3600 900 1209600 1800

3 x Serial: 2023050124

let me know if you like this !

MAC Converter

OpenBSD, Network

MAC Address Converter

We’re all dealing with MAC Addresses, some times … there are different formats on different systems. this little script convert it to all formats and you can choise the appropriate ones.

Example

$ maconvert aa:bb:cc:dd:ee:ff

aabbccddeeff
aa:bb:cc:dd:ee:ff
aa-bb-cc-dd-ee-ff
aabb.ccdd.eeff

Script

Copy/Paste will work on OpenBSD, Linux needs some small Modifications (as there is no doas for example …)

doas su -

cat << 'EOFSCRIPT' > /usr/local/bin/maconvert
#!/usr/bin/env bash

# v0.1, 2021, by Christian Henschel
# v0.2, 2021-12-29, Stöge -> add OpenBSD Support & install gawk if needed

if [ OpenBSD == $(uname -s) ]; then
  which gawk &>/dev/null || doas pkg_add gawk
  _awk=$(which gawk)
else
  _awk=$(which awk)
fi

if [ -z "$1" ]; then
  cat <<'EOF'

  no mac address entered, valid format are:

  cafedeadbeef
  cafe.dead.beef
  ca:fe:de:ad:be:ef
  ca-fe-de-ad-be-ef

EOF
  exit 1
else
  mac=$(echo $1 | sed -e 's/[.:-]//g')
  maccolon=$(echo $mac  | $_awk '{gsub(/..\B/,"&:")}1')
  macdash=$(echo $mac  | $_awk '{gsub(/..\B/,"&-")}1')
  macpoint=$(echo $mac | $_awk '{gsub(/....\B/,"&.")}1')
fi

cat <<EOF

  $mac
  $maccolon
  $macdash
  $macpoint

EOF
exit 0
EOFSCRIPT

doas chmod 755 /usr/local/bin/maconvert
maconvert

NJoy!