We connect to the Linux server from windows using putty and we all share the common user and password. I'm creating a file and I want to give read only permission to others but if I login (from my machine) then I should have full access to the file.
Since we all share the same user/pwd I cannot the bifurcate the permissions based on the user.
Is it possible to give the permissions to a file based on from which machine(IP address) logged in?
Is it possible to give the permissions to a file based on from which machine (IP address) [the user is] logged in?
No, it's not possible. The traditional Linux access framework uses DAC (Discretionary Access Control), based on users and groups. Even ACLs, which allow for more fine-grained permissions, are based on that. And so (IIRC) are PAMs.
Theoretically, you might perhaps find a SElinux policy that does something similar to what you want, but it is a very ill-advised solution.
It looks like the server you use is badly administered. If all of you have the same account, there are no separate people, there is only one "user". You should instead have the sysadmin create separate Linux accounts for you and your colleagues, and go from there.
