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Chmod examples using octal mode First column shows the chmod command , second column shows how the value is calculated for the permission last columns of owner, group, others shows individual octal values and actual bit set on file as seen by ls l For setting any other permission combination for owner, group & other , pick correspondingChmod accepts file mode in symbolic notation as well as octal, and this is useful when you only want to modify one permission bit (one letter in that rwxrxrx string) Perl Duck's answer explains how to do this to set the mode you want Using octal syntax for chmod allows setting the absolute permissions for owner, group, and other in one quick command The syntax requires three octal digits, each representing the owner, group, and other permissions, respectively Chmod Cheatsheet Linux Chmod octal codes