modifying a file without and editor
 

Hi.

I am wanting to find a way to modify a file, for instance (vfstab)'example only'

lets say I have an entry(line) in there that I need to '#' out, but are un able to vi or us any other editor on the file

I seen people change the line of a file by using a string command. not sure if it was a cat/sed/echo....

For the life of me I can not remember how they did it.


thanks

hashing out a line cannot be done through cat or echo. using echo you could append a line. you could do it by sed but that would be complex.
vi is always there and if you can use cat you can also use vi.

sed would be the easiest solution.

mdhmi, could you give me a command using sed to hash out 10th line out of a 17line file. :)
eg

not delete the line, insert a hash.