On 12-Mar-2018 10:14 AM, "Indranil Das Gupta" <indradg@gmail.com> wrote: Rajesh, On 12-Mar-2018 9:36 AM, "takan bhatt" <takan.bhatt@gmail.com> wrote: $ wget -q -O- https://debian.koha-community.org/koha/gpg.asc | sudo apt-key add - I think sudo is required to add koha key sudo *is* required for this step *only* if you are logged in as a non-root user. If you are logged in as root, then you do not require the sudo. That's exactly what Chris Brown mentioned. Adding to that - the documentation expects you to understand after seeing the "$" in front of the command that it is illustrating a case where you are logged on as non-root user. If I were you, i would concentrate on polishing up my linux admin skills. :-) Regards -idg Indranil Das Gupta L2C2 Technologies