When modifying permissions on Windows I backup the ACLs to a file first using a commands like: subinacl /noverbose /output=C:\temp\foldername_redir_permissions_backup_star_star.txt /subdirectories W:\foldername\*.*and...subinacl /noverbose /output=C:\temp\foldername_redir_permissions_backup.txt /subdirectories W:\foldername\...to back them up.And then if they need to be restored, a command like...subinacl /playfile C:\temp\foldername_redir_permissions_backup_star_star.txt...can be used to restore them.So can the same thing be done for POSIX permissions on Linux / Unix?  And what about ACL extended permissions?
Equivalent of subinacl.exe on linux / unix?
permissions;backup;acl
setfacl is designed to accept getfacl output as input. Meaning you can run getfacl, save the output to a file, do your thing, then restore the ACL. The exact procedure can vary depending on your platform. On Linux though:  # Take a peek at the current ACL[root@vlp-fuger ~]# getfacl newFile# file: newFile# owner: root# group: rootuser::rw-group::r--group:provisor:rwxmask::rwxother::r--  # Backup ACL[root@vlp-fuger ~]# getfacl newFile > newFile.acl  # Remove the group permission, add another that we'll later want to get rid of[root@vlp-fuger ~]# setfacl -x g:provisor newFile[root@vlp-fuger ~]# setfacl -m g:ihtxadm:r-x newFile[root@vlp-fuger ~]# getfacl newFile# file: newFile# owner: root# group: rootuser::rw-group::r--group:ihtxadm:r-xmask::r-xother::r--  # Restore ACL to where it was[root@vlp-fuger ~]# setfacl --restore=newFile.acl  # Resulting ACL[root@vlp-fuger ~]# getfacl newFile# file: newFile# owner: root# group: rootuser::rw-group::r--group:provisor:rwxmask::rwxother::r--You can also use --set-file on the setfacl you use to restore and set it to - if you want to pipe the old ACL in. You can also use getfacl -R to backup the ACL's of entire directory trees.