saving . . . saved -o operation meaning has been deleted. -o operation meaning has been hidden .
-o operation meaning
is there any material to read out to get these operation meaning -r = read , -w = write.   -o=? 

BASH String-and-File-attributes 09-10 min 40-50 sec 18-07-20, 1:55 p.m. Mohit_18


type command in terminal

    man chmod

you will see the  documentations
20-03-21, 5:12 a.m. rohmh

Log-in to answer to this question.