Little of BASH knowledge Initialization files .bash_profile .bashrc If you want to do some additional initialization. Create file like this ~/.myenv PATH=$PATH:/root/bin:/sbin:/usr/sbin export PATH and issue command source .myenv vystupy vsetko na /dev/null vsetky shelly okrem sh program >& /dev/null vsetko na /dev/null sh aj bash program &> /dev/null program 2>errorr.msg >standard.out copying of whole directories cd /usr tar cf - . | (cd /mnt/add; tar xvf -) running two jobs in the same time dialup up ppp2 & firew 1 & runs both jobs in background using rsh rsh vladopc tar cf - /home/jakub | (cd; tar xvf -) will copy directory /home/jakub from vladopc to user's home directory arithmetics #!/bin/sh echo Testing the arithmetics C=1 while [ $C -lt 15 ];do echo $C C=`expr $C + 1` done C=1 while [ $C -lt 15 ];do echo $C C=$[ $C+1 ] done