2 Using octal permissions what command would you use to chan

2.

Using octal permissions, what command would you use to change the permissions of a file called brysam.sh to -r-xrwx--x ?

Solution

1. Each digit in octal representation sets permission for the owner(rwx), group(rwx), and other(rwx) as follows:

so octal number = (r+x)(r+w+x)(x) and the command is chmod ---change mode as below:

    chmod 571 brysam.sh

2   -r with commands chmod ,cp or rm is used to recursively execute the command on all file,directories and subdirectories. chmod -r will change mode recursively, cp -r will copy recursively and rm -r will remove recursively.