brock@arden:~/csci235$
brock@arden:~/csci235$ mkdir ~/CSCI235
brock@arden:~/csci235$ chmod 700 ~/CSCI235
brock@arden:~/csci235$ ls -ld ~/CSCI235
drwx------ 2 brock users 4096 Jan 16 10:07 /home/brock/CSCI235
brock@arden:~/csci235$ chmod 777 ~/CSCI235
brock@arden:~/csci235$ chmod go-rwx CSCI235
chmod: cannot access ‘CSCI235’: No such file or directory
brock@arden:~/csci235$ chmod go-rwx ~/CSCI235
brock@arden:~/csci235$ ls -ld ~/CSCI235
drwx------ 2 brock users 4096 Jan 16 10:07 /home/brock/CSCI235
brock@arden:~/csci235$ setfacl -m u:uncacsci:rx ~/CSCI235
brock@arden:~/csci235$ ls -ld ~/CSCI235
drwxr-x---+ 2 brock users 4096 Jan 16 10:07 /home/brock/CSCI235
brock@arden:~/csci235$ getfacl ~/CSCI235
getfacl: Removing leading '/' from absolute path names
# file: home/brock/CSCI235
# owner: brock
# group: users
user::rwx
user:uncacsci:r-x
group::---
mask::r-x
other::---

brock@arden:~/csci235$ sh -i uncacsci
sh: 0: Can't open uncacsci
brock@arden:~/csci235$ su -i uncacsci
su: invalid option -- 'i'
Usage: su [options] [LOGIN]

Options:
  -c, --command COMMAND         pass COMMAND to the invoked shell
  -h, --help                    display this help message and exit
  -, -l, --login                make the shell a login shell
  -m, -p,
  --preserve-environment        do not reset environment variables, and
                                keep the same shell
  -s, --shell SHELL             use SHELL instead of the default in passwd

brock@arden:~/csci235$ sh -s uncacsci
$ whoami
brock
$ 
brock@arden:~/csci235$ su uncacsci
Password: 
uncacsci@arden:/home/brock/csci235$ whoami
uncacsci
uncacsci@arden:/home/brock/csci235$ cd
uncacsci@arden:~$ ls -l CSCI235
ls: cannot access CSCI235: No such file or directory
uncacsci@arden:~$ ls -l /home/brock/CSCI235
total 0
uncacsci@arden:~$ ls -l /home/brock/CSCI235
total 4
-rw-r--r-- 1 brock users 13 Jan 16 10:13 canyouseeit
uncacsci@arden:~$ cat /home/brock/CSCI235/canyouseeit 
Yes you can!
uncacsci@arden:~$ exit
exit
brock@arden:~/csci235$ su olympia0
Password: 
su: Authentication failure
brock@arden:~/csci235$ kpasswd -p brock/admin
usage: kpasswd [principal]
brock@arden:~/csci235$ kpasswd brock/admin
Password for brock/admin@CS.UNCA.EDU: 
Enter new password: 

Enter it again: 


[1]+  Stopped                 kpasswd brock/admin
brock@arden:~/csci235$ kadmin brock/admin
Couldn't open log file /var/log/krb5libs.log: Permission denied
Authenticating as principal brock/admin@CS.UNCA.EDU with password.
Password for brock/admin@CS.UNCA.EDU: 
rc
kadmin: GSS-API (or Kerberos) error while initializing kadmin interface
brock@arden:~/csci235$