AFS

AFS is a distributed networked file system.

Documentation

• CERN AFS UserGuide

Useful commands

• kinit - obtain kerberos ticket
• fs listacl
• fs setacl
• kpasswd

Resources

Global for TOTEM

• /afs/cern.ch/exp/totem/soft (has daily backup)

Personal

• ex. /afs/cern.ch/user/l/lgrzanka AFS home directories (backup, quota 50MB)
• ex. /afs/cern.ch/exp/totem/scratch/hubert (without backup, personal scratch space - not for all users)

Permissions

Examples:

Remove unauthorized access

To protect the directory from eyes of unauthorized users you can always use the command:

fs setacl . -acl system:anyuser none

You can run it for every subdirectory:

find . -type d -exec fs setacl {} -acl system:anyuser none \;

List members of group:

All groups should have prefix cern: . To display members of zj group, type:

pts membership cern:zj

You can setup group ACLs using command:

find . -type d -exec fs setacl {} -acl cern:zj read \;

-- LeszekGrzanka - 14 Aug 2008