test@Walhall:/home/test > cp /etc/hosts ./
test@Walhall:/home/test > umask 077
test@Walhall:/home/test > cp /etc/passwd ./
test@Walhall:/home/test > ls -l
total 3
-rw-r--r--   1 test     users         363 Jan  5 22:05 hosts
-rw-------   1 test     users         720 Jan  5 22:06 passwd
-rw-------   1 test     users           0 Jan  5 22:07 rechte.out
drwxr-xr-x  14 test     users        1024 Nov 17  1995 siscadp/
test@Walhall:/home/test > chmod a+r passwd
test@Walhall:/home/test > chmod g+w hosts
test@Walhall:/home/test > chmod 777 rechte.out
test@Walhall:/home/test > ls -l
total 4
-rw-rw-r--   1 test     users         363 Jan  5 22:05 hosts
-rw-r--r--   1 test     users         720 Jan  5 22:06 passwd
-rwxrwxrwx   1 test     users         842 Jan  5 22:14 rechte.out*
drwxr-xr-x  14 test     users        1024 Nov 17  1995 siscadp/
test@Walhall:/home/test > chgrp games rechte.out
test@Walhall:/home/test > newgrp game
test@Walhall:/home/test > cp /etc/group
test@Walhall:/home/test > ls -l
total 5
-rw-------   1 test     game          244 Jan  5 22:13 group
-rw-rw-r--   1 test     users         363 Jan  5 22:05 hosts
-rw-r--r--   1 test     users         720 Jan  5 22:06 passwd
-rwxrwxrwx   1 test     game         1104 Jan  5 22:15 rechte.out*
drwxr-xr-x  14 test     users        1024 Nov 17  1995 siscadp/
test@Walhall:/home/test > chmod u+s rechte.out
test@Walhall:/home/test > ls -l
total 5
-rw-------   1 test     game          244 Jan  5 22:13 group
-rw-rw-r--   1 test     users         363 Jan  5 22:05 hosts
-rw-r--r--   1 test     users         720 Jan  5 22:06 passwd
-rwsrwxrwx   1 test     game         1366 Jan  5 22:15 rechte.out*
drwxr-xr-x  14 test     users        1024 Nov 17  1995 siscadp/