I want to change the user permissions i.e $ touch myfile $ls -l myfile -rw-r--r-- $chmod u=+x myfile here i also want to give the execute prmission to the user but the list command shows (Read & Write also removed why ?) $ls -l ----r--r-- yes the other way is to use the number(Octal) i.e $chmod 700 myfile $ls -l myfile -rwx------ by using 744 with chmod it can show me desire desire result. plz guide me that how can i adjuct it by using Owner,Group & Others example chmod u=+r,+w,+x so that i can view the the user have rwx permission.

why do u use chmod command as chmod u=+x that's a bit strange syntax. dont you get any errors when you do that?? if you just want to add execute permission on file use chmod u+x filename and you will see that x is ADDED and nothing is removed.