For BashWiki (if not there yet)

Bash Wiki with tips and trick you can find at Wooledge.org

noneo:~$ man read
No manual entry for read

noneo:~$ help read

:-)

Other tricks:

for i in "$(< "$file")"; do echo $i; done

n=0; while :; do echo $n; let n=$n+1; done

sudo tail -f /var/log/auth.log | while read  LINE
do
  if [[ $LINE =~ "session opened" ]]
  then
    NEWUSER=`echo $LINE | awk '{ print $11; }'`
    zenity --error --text="$NEWUSER logged in"
  fi
done

: ${2?"Two parameters required. Please fix it."}

To Be Continued...