AFS

HPC and Data for Lattice QCD

noe 01/05/22 o display Access Control List (ACL) of a directory or file:

     fs la <dir>
   r=read,w=write,l=list,d=delete,i=insert,a=administer,k=lock
   r,w and k apply to files, the rest to the directory.

o change ACL :

     fs sa <dir> <id> <acl>

   e.g. 
     fs sa . desy-hosts rl

   A file is readable if 
     the file has mode 0400 or more AND
     the user has 'r' and 'l' permissions in the ACL.

   A file is writable if
     the file has mode 0200 or more AND
     the user has 'w' and 'l' permissions in the ACL.

   For 'chmod' on a file you need 'w'
   For 'chmod' on a directory you need 'd','i' and 'l'.

o check members of a group


    pts membership <group>

o check the quota of an AFS volume

    fs lq <path>

'chown' does not work in AFS. To create a file or directory with a specific group try

    sg <group> -c 'touch <file>'
    sg <group> -c 'mkdir <dir>'

or use 'newgrp'.