soluzioni
Per capire il senso esatto della domanda, osserviamo che le macchine della
aula 4 condividono le home e la posta.
[steffe@lab7: steffe]$ date
Thu Oct 2 22:39:49 CEST 2003
[steffe@lab7: steffe]$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda2 8254272 5695512 2139464 73% /
/dev/hda1 124427 16991 101012 15% /boot
/dev/hda8 14634572 32828 13858340 1% /exp
/dev/hda5 10317828 32812 9760900 1% /local
none 127720 0 127720 0% /dev/shm
/dev/hda7 2039792 35780 1900396 2% /tmp
/dev/hda6 2063504 285664 1673020 15% /var
mail:/data/home 91540100 40831564 46058524 47% /net/home
mail:/data/mail 91540100 40831564 46058524 47% /net/mail
[steffe@lab7 steffe]$ ls -la /home
lrwxrwxrwx 1 root root 9 Oct 16 2002 /home ->/net/home
[steffe@lab7 steffe]$ ls -la /var/spool/mail
lrwxrwxrwx 1 root root 9 Oct 16 2002 /var/spool/mail -> /net/mail
Dunque è mail il server NFS che esporta le home e mail.
Chiediamoci quali altre macchine possono montare tali filesystem da mail:
[steffe@lab7 steffe]$ showmount -a mail
All mount points on mail:
brouwer.dm.unipi.it:/data/home
brouwer.dm.unipi.it:/data/mail
brouwer.dm.unipi.it:/data/share
cayley.dm.unipi.it:/data/home
cayley.dm.unipi.it:/data/mail
cayley.dm.unipi.it:/data/share
cluster1.dm.unipi.it:/data/home
cluster1.dm.unipi.it:/data/mail
cluster1.dm.unipi.it:/data/share
cluster10.dm.unipi.it:/data/home
cluster10.dm.unipi.it:/data/mail
cluster10.dm.unipi.it:/data/share
cluster11.dm.unipi.it:/data/home
cluster11.dm.unipi.it:/data/mail
cluster13.dm.unipi.it:/data/home
cluster13.dm.unipi.it:/data/mail
cluster13.dm.unipi.it:/data/share
cluster14.dm.unipi.it:/data/home
cluster14.dm.unipi.it:/data/mail
cluster15.dm.unipi.it:/data/home
cluster15.dm.unipi.it:/data/mail
cluster19.dm.unipi.it:/data/home
cluster19.dm.unipi.it:/data/mail
cluster19.dm.unipi.it:/data/share
cluster20.dm.unipi.it:/data/home
cluster20.dm.unipi.it:/data/mail
cluster20.dm.unipi.it:/data/share
cluster22.dm.unipi.it:/data/home
cluster22.dm.unipi.it:/data/mail
cluster23.dm.unipi.it:/data/home
cluster23.dm.unipi.it:/data/mail
cluster23.dm.unipi.it:/data/share
cluster28.dm.unipi.it:/data/home
cluster28.dm.unipi.it:/data/mail
cluster28.dm.unipi.it:/data/share
cluster3.dm.unipi.it:/data/home
cluster3.dm.unipi.it:/data/mail
cluster3.dm.unipi.it:/data/share
cluster4.dm.unipi.it:/data/home
cluster4.dm.unipi.it:/data/mail
cluster5.dm.unipi.it:/data/home
cluster5.dm.unipi.it:/data/mail
cluster5.dm.unipi.it:/data/share
darboux.dm.unipi.it:/data/share
dida1.dm.unipi.it:/data/home
dida1.dm.unipi.it:/data/mail
dida1.dm.unipi.it:/data/share
dida10.dm.unipi.it:/data/home
dida10.dm.unipi.it:/data/mail
dida10.dm.unipi.it:/data/share
dida11.dm.unipi.it:/data/home
dida11.dm.unipi.it:/data/mail
dida11.dm.unipi.it:/data/share
dida2.dm.unipi.it:/data/home
dida2.dm.unipi.it:/data/mail
dida2.dm.unipi.it:/data/share
dida3.dm.unipi.it:/data/mail
dida3.dm.unipi.it:/data/share
dida4.dm.unipi.it:/data/home
dida4.dm.unipi.it:/data/mail
dida4.dm.unipi.it:/data/share
dida5.dm.unipi.it:/data/home
dida6.dm.unipi.it:/data/home
dida6.dm.unipi.it:/data/mail
dida6.dm.unipi.it:/data/share
dida7.dm.unipi.it:/data/home
dida7.dm.unipi.it:/data/mail
dida7.dm.unipi.it:/data/share
dida8.dm.unipi.it:/data/mail
dida8.dm.unipi.it:/data/share
dida9.dm.unipi.it:/data/home
dida9.dm.unipi.it:/data/mail
dida9.dm.unipi.it:/data/share
dott1.dm.unipi.it:/data/home
dott1.dm.unipi.it:/data/mail
dott10.dm.unipi.it:/data/home
dott10.dm.unipi.it:/data/share
dott11.dm.unipi.it:/data/share
dott12.dm.unipi.it:/data/home
dott12.dm.unipi.it:/data/mail
dott12.dm.unipi.it:/data/share
dott3.dm.unipi.it:/data/home
dott5.dm.unipi.it:/data/home
dott5.dm.unipi.it:/data/mail
dott7.dm.unipi.it:/data/home
dott9.dm.unipi.it:/data/home
dott9.dm.unipi.it:/data/mail
dott9.dm.unipi.it:/data/share
fourier.dm.unipi.it:/data/home
fourier.dm.unipi.it:/data/mail
fourier.dm.unipi.it:/data/share
fubini.dm.unipi.it:/data/share
groebner.dm.unipi.it:/data/home
groebner.dm.unipi.it:/data/mail
groebner.dm.unipi.it:/data/share
lab1.dm.unipi.it:/data/home
lab1.dm.unipi.it:/data/share
lab10.dm.unipi.it:/data/mail
lab10.dm.unipi.it:/data/share
lab11.dm.unipi.it:/data/home
lab11.dm.unipi.it:/data/share
lab12.dm.unipi.it:/data/home
lab13.dm.unipi.it:/data/home
lab13.dm.unipi.it:/data/share
lab14.dm.unipi.it:/data/home
lab14.dm.unipi.it:/data/share
lab15.dm.unipi.it:/data/home
lab15.dm.unipi.it:/data/mail
lab15.dm.unipi.it:/data/share
lab16.dm.unipi.it:/data/home
lab16.dm.unipi.it:/data/mail
lab16.dm.unipi.it:/data/share
lab17.dm.unipi.it:/data/home
lab17.dm.unipi.it:/data/mail
lab17.dm.unipi.it:/data/share
lab18.dm.unipi.it:/data/home
lab18.dm.unipi.it:/data/share
lab19.dm.unipi.it:/data/home
lab19.dm.unipi.it:/data/share
lab2.dm.unipi.it:/data/home
lab2.dm.unipi.it:/data/share
lab20.dm.unipi.it:/data/home
lab20.dm.unipi.it:/data/share
lab21.dm.unipi.it:/data/home
lab21.dm.unipi.it:/data/share
lab22.dm.unipi.it:/data/home
lab22.dm.unipi.it:/data/mail
lab22.dm.unipi.it:/data/share
lab23.dm.unipi.it:/data/home
lab23.dm.unipi.it:/data/mail
lab23.dm.unipi.it:/data/share
lab24.dm.unipi.it:/data/home
lab24.dm.unipi.it:/data/mail
lab24.dm.unipi.it:/data/share
lab25.dm.unipi.it:/data/home
lab25.dm.unipi.it:/data/share
lab26.dm.unipi.it:/data/home
lab3.dm.unipi.it:/data/home
lab3.dm.unipi.it:/data/share
lab4.dm.unipi.it:/data/home
lab4.dm.unipi.it:/data/mail
lab4.dm.unipi.it:/data/share
lab5.dm.unipi.it:/data/home
lab5.dm.unipi.it:/data/mail
lab6.dm.unipi.it:/data/home
lab6.dm.unipi.it:/data/mail
lab6.dm.unipi.it:/data/share
lab7.dm.unipi.it:/data/home
lab7.dm.unipi.it:/data/mail
lab7.dm.unipi.it:/data/share
lab8.dm.unipi.it:/data/share
lab9.dm.unipi.it:/data/home
lab9.dm.unipi.it:/data/mail
lab9.dm.unipi.it:/data/share
lyoung.private:/data
monge.dm.unipi.it:/data/home
monge.dm.unipi.it:/data/mail
monge.dm.unipi.it:/data/share
pacioli.dm.unipi.it:/data/home
pacioli.dm.unipi.it:/data/mail
pacioli.dm.unipi.it:/data/share
paley.dm.unipi.it:/data/share
stokes.dm.unipi.it:/data/home
zeuthen.dm.unipi.it:/data/home
zeuthen.dm.unipi.it:/data/mail
zeuthen.dm.unipi.it:/data/share
zorn.dm.unipi.it:/data/home
zorn.dm.unipi.it:/data/mail
zorn.dm.unipi.it:/data/share
Dunque tutte queste macchine possono montare /data/home, /data/share, /data/mail dal
server NFS mail.
Ma in /data/share cosa ci sarà ?
proviamo allora questo comando:
[steffe@lab7 steffe]$ ls -la /net/share
total 1288
drwxr-xr-x 17 root root 4096 Sep 24 19:04 .
drwxr-xr-x 5 root root 0 Oct 2 18:02 ..
drwxr-xr-x 2 root root 4096 Sep 3 12:53 acl
drwxr-xr-x 20 root root 4096 Jun 25 09:33 apps
drwxr-xr-x 2 root root 4096 Jun 4 17:41 checklogin
drwxr-xr-x 17 root root 4096 Sep 9 17:53 client
drwxr-xr-x 3 root root 4096 Dec 6 2001 docs
-rwxr-xr-x 1 root root 170320 Nov 28 2002 dvips
-rwxr-xr-x 1 root root 98 Aug 4 10:22 filtro_pine.sh
-rwxr-xr-x 1 root root 86 Aug 4 10:20 filtro_pine.sh~
-rwxr-xr-x 1 root root 113 Aug 4 12:48 filtro_spam.sh
-rw-r--r-- 1 root root 107 Aug 4 10:30 filtro_spam.sh~
-rw-r--r-- 1 root root 40 Jun 19 18:02 hosts.allow
-rw------- 1 root root 297048 Nov 27 2002 icewm-1.0.4-1.i386.rpm
-rw-r--r-- 1 root root 706066 Dec 16 2002 install_flash_player_6_linux.tar.gz
drwxr-xr-x 3 root root 4096 Oct 16 2002 ks
-rwxr-xr-x 1 root root 82 Oct 21 2002 labupdate.sh
drwxr-xr-x 5 root root 4096 Jul 29 2002 live
drwxr-xr-x 2 root root 4096 Aug 1 2002 mail
-rw-r--r-- 1 root root 7395 Sep 24 10:57 named.rev
-rwxr-xr-x 1 root root 189 Sep 24 19:04 netmask.sh
-rw-r--r-- 1 root root 29 Sep 24 11:42 nologin
-rw-r--r-- 1 root root 60 Jan 20 2003 nosound.sh
drwxr-xr-x 2 root root 4096 Nov 18 2002 openoffice_printers
-rwxr-xr-x 1 root root 97 Jul 26 2002 printers.sh
-rwxr-xr-x 1 root root 92 Feb 28 2003 reboot.sh
-rwxr-xr-x 1 root root 528 Sep 24 11:27 rename.sh
drwxr-xr-x 2 root root 4096 Jun 19 18:07 scripts
drwxr-xr-x 2 root root 8192 Jan 16 2003 server
drwxr-xr-x 2 root root 4096 Aug 2 2002 ssh
drwxr-xr-x 2 root root 4096 Nov 7 2002 status
drwxr-xr-x 2 root root 4096 Jun 19 17:34 toexecute
drwxr-xr-x 2 root root 4096 Aug 6 2002 utilities
e inoltre ora abbiamo:
[steffe@lab7 steffe]$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda2 8254272 5695512 2139464 73% /
/dev/hda1 124427 16991 101012 15% /boot
/dev/hda8 14634572 32828 13858340 1% /exp
/dev/hda5 10317828 32812 9760900 1% /local
none 127720 0 127720 0% /dev/shm
/dev/hda7 2039792 35780 1900396 2% /tmp
/dev/hda6 2063504 285672 1673012 15% /var
mail:/data/home 91540100 40832244 46057844 47% /net/home
mail:/data/mail 91540100 40832244 46057844 47% /net/mail
mail:/data/share 91540100 40832244 46057844 47% /net/share
Cosa è accaduto ?
L'automounter ha montato automaticamente /net/share da mail:/data/share non
appena un comando (il nostro ls -la /net/share) ne ha segnalato la necessità.
CHIUDI
Laboratorio di Comunicazione mediante Calcolatore - Sergio Steffè - AA 2003/2004
- PISA