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