### Set OpSys date:
date --set="3/6/2002 10:55"

# dreambox 18.01.2004 15:30 UTC:
date -s "01 18 1530 2004"

### Hardware Clock (CMOS) date:
hwclock --set --date="3/6/2002 10:54"
### OS date to Hardware Clock (CMOS):
hwclock --systohc

file=file_`date +%y%m%d%H%M%S`

#!/bin/bash
# vai existee fails
if [ -e file?_* ]; then
	echo Fails ir
else
	echo Fails nav
fi

#!/bin/bash
echo "All homes:"
usr=`ls /home`
for u in $usr; do
        echo $u
done

• Online Linux 'man' pages
• www.linuxcommand.org and man pages