/media/sda-magnetic/david/Dok-15-2023-11-27/fernuni-hagen/cs-i-ii/old-cs-2-03/bash-programming/lex-yacc-bash-etc/bash0023.sh

#!/bin/bash

echo "Hallo"
# Dies ist ein Kommentar

var1=Hallo
var2="Welt"

echo $var1
echo $var2

if [ $var1 == $var2 ]
then 
  echo $var1
else 
  echo $var2
fi

while [ $var1 == $var2 ]
do 
  echo $var1
done

for var3 in "Hallo " "Welt " "sagt " "David " "Vajda"
do 
  echo $var3
done 

typeset -i i=5

i=$(( 4 ))
i=$(( 4+4 ))

while [ $i -le 50 ]
do 
  echo $i
  i=$(( $i + 1))
done 

usrmod
usradd
usrdel
grpmod
grpadd
grpdel
newgrp
id
passwd
chfn
chsh

mkdir 
rmdir 
rm
cd
cat
cp
blkid
exit
echo
date
dd
unlink 
mv
mmv
cut