some useful command for openSuse

cat zjone.txt|while read line; do echo $line sdf >>zjTwo.txt;done

for ((i=1;i<3;i++));do echo $i ;done

grep str ./ -r

find ./

use 'Ctr+V+M' (may get the ^M character)

zypper

yast

mount -o (to connect ISO)

ln -s (to create link for file or directory)

cp -r *./release/

'ssh -keygen ' may generate the .ssh directory

whereis java

tar -zxvf (for tar.gz)

tar -jxvf