soluzioni
Per capire il senso esatto della domanda, osserviamo che le macchine della
aula 4 condividono le home e la posta.
[steffe@lab6 steffe]$ date
Sat Nov 3 17:30:06 CET 2007
[steffe@lab6 steffe]$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda2 8254272 6662960 1172016 86% /
/dev/hda1 124427 12148 105855 11% /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 37012 1899164 2% /tmp
/dev/hda6 2063504 369676 1589008 19% /var
mail:/data/home 100798072 83461112 12216640 88% /net/home
mail:/data/mail 100798072 83461112 12216640 88% /net/mail
[steffe@lab6 steffe]$ ls -la /home
lrwxrwxrwx 1 root root 9 Oct 16 2002 /home -> /net/home
[steffe@lab6 steffe]$ ls -la /var/spool/mail
lrwxrwxrwx 1 root root 9 Oct 16 2002 /var/spool/mail -> /net/mai
Dunque è mail il server NFS che esporta le home e mail.
Chiediamoci quali altre macchine possono montare tali filesystem da mail:
[steffe@lab6 steffe]$ showmount -e mail
Export list for mail:
/data/home/dottorandi @CLIstudidott
/data 192.168.1.0/24,ssh2.dm.unipi.it,ssh1.dm.unipi.it,lab28.dm.unipi.it,lab27.dm.unipi.it,lab26.dm.unipi.it,lab25.dm.unipi.it,lab24.dm.unipi.it,lab23.dm.unipi.it,lab22.dm.unipi.it,lab21.dm.unipi.it,lab20.dm.unipi.it,lab19.dm.unipi.it,lab18.dm.unipi.it,lab17.dm.unipi.it,lab16.dm.unipi.it,lab15.dm.unipi.it,lab14.dm.unipi.it,lab13.dm.unipi.it,lab12.dm.unipi.it,lab11.dm.unipi.it,lab10.dm.unipi.it,lab9.dm.unipi.it,lab8.dm.unipi.it,lab7.dm.unipi.it,lab6.dm.unipi.it,lab5.dm.unipi.it,lab4.dm.unipi.it,lab3.dm.unipi.it,lab2.dm.unipi.it,lab1.dm.unipi.it,dott12.dm.unipi.it,dott11.dm.unipi.it,dott10.dm.unipi.it,dott9.dm.unipi.it,dott8.dm.unipi.it,dott7.dm.unipi.it,dott6.dm.unipi.it,dott5.dm.unipi.it,dott4.dm.unipi.it,dott3.dm.unipi.it,dott2.dm.unipi.it,dott1.dm.unipi.it,cluster8.dm.unipi.it,cluster7.dm.unipi.it,cluster6.dm.unipi.it,cluster5.dm.unipi.it,cluster4.dm.unipi.it,cluster3.dm.unipi.it,cluster2.dm.unipi.it,cluster1.dm.unipi.it,temp5.dm.unipi.it
/data/home toeplitz.dm.unipi.it,tonelli.dm.unipi.it
/space/share lasker.dm.unipi.it,ssh2.dm.unipi.it,ssh1.dm.unipi.it,lab28.dm.unipi.it,lab27.dm.unipi.it,lab26.dm.unipi.it,lab25.dm.unipi.it,lab24.dm.unipi.it,lab23.dm.unipi.it,lab22.dm.unipi.it,lab21.dm.unipi.it,lab20.dm.unipi.it,lab19.dm.unipi.it,lab18.dm.unipi.it,lab17.dm.unipi.it,lab16.dm.unipi.it,lab15.dm.unipi.it,lab14.dm.unipi.it,lab13.dm.unipi.it,lab12.dm.unipi.it,lab11.dm.unipi.it,lab10.dm.unipi.it,lab9.dm.unipi.it,lab8.dm.unipi.it,lab7.dm.unipi.it,lab6.dm.unipi.it,lab5.dm.unipi.it,lab4.dm.unipi.it,lab3.dm.unipi.it,lab2.dm.unipi.it,lab1.dm.unipi.it,dott12.dm.unipi.it,dott11.dm.unipi.it,dott10.dm.unipi.it,dott9.dm.unipi.it,dott8.dm.unipi.it,dott7.dm.unipi.it,dott6.dm.unipi.it,dott5.dm.unipi.it,dott4.dm.unipi.it,dott3.dm.unipi.it,dott2.dm.unipi.it,dott1.dm.unipi.it,cluster8.dm.unipi.it,cluster7.dm.unipi.it,cluster6.dm.unipi.it,cluster5.dm.unipi.it,cluster4.dm.unipi.it,cluster3.dm.unipi.it,cluster2.dm.unipi.it,cluster1.dm.unipi.it
/data/home/posso cardano.dm.unipi.it,posso.dm.unipi.it,pico.dm.unipi.it,posso10.dm.unipi.it,posso9.dm.unipi.it,posso8.dm.unipi.it,posso7.dm.unipi.it,posso6.dm.unipi.it,posso5.dm.unipi.it,posso4.dm.unipi.it,posso3.dm.unipi.it,posso2.dm.unipi.it,posso1.dm.unipi.it
/space/deleted_users_gauss lgauss.private
E quali stanno montando realmente dei file systems da mail ?
[steffe@lab6 steffe]$ showmount -a mail
All mount points on mail:
131.114.72.115:temp5.dm.unipi.it
131.114.72.30:lasker.dm.unipi.it
131.114.72.77:toeplitz.dm.unipi.it
131.114.73.121:lab1.dm.unipi.it
131.114.73.122:lab2.dm.unipi.it
131.114.73.123:lab3.dm.unipi.it
131.114.73.124:lab4.dm.unipi.it
131.114.73.125:lab5.dm.unipi.it
131.114.73.126:lab6.dm.unipi.it
131.114.73.127:lab7.dm.unipi.it
131.114.73.128:lab8.dm.unipi.it
131.114.73.129:lab9.dm.unipi.it
131.114.73.130:lab10.dm.unipi.it
131.114.73.131:lab11.dm.unipi.it
131.114.73.132:lab12.dm.unipi.it
131.114.73.133:lab13.dm.unipi.it
131.114.73.134:lab14.dm.unipi.it
131.114.73.135:lab15.dm.unipi.it
131.114.73.136:lab16.dm.unipi.it
131.114.73.137:lab17.dm.unipi.it
131.114.73.138:lab18.dm.unipi.it
131.114.73.139:lab19.dm.unipi.it
131.114.73.140:lab20.dm.unipi.it
131.114.73.141:lab21.dm.unipi.it
131.114.73.142:lab22.dm.unipi.it
131.114.73.143:lab23.dm.unipi.it
131.114.73.144:lab24.dm.unipi.it
131.114.73.145:lab25.dm.unipi.it
131.114.73.146:lab26.dm.unipi.it
131.114.73.171:dott1.dm.unipi.it
131.114.73.172:dott2.dm.unipi.it
131.114.73.173:dott3.dm.unipi.it
131.114.73.174:dott4.dm.unipi.it
131.114.73.175:dott5.dm.unipi.it
131.114.73.176:dott6.dm.unipi.it
131.114.73.177:dott7.dm.unipi.it
131.114.73.178:dott8.dm.unipi.it
131.114.73.179:dott9.dm.unipi.it
131.114.73.180:dott10.dm.unipi.it
131.114.73.181:dott11.dm.unipi.it
131.114.73.182:dott12.dm.unipi.it
131.114.73.191:@CLIstudidott
131.114.73.191:studidott1.dm.unipi.it
131.114.73.192:@CLIstudidott
131.114.73.192:studidott2.dm.unipi.it
131.114.73.193:@CLIstudidott
131.114.73.193:studidott3.dm.unipi.it
131.114.73.194:@CLIstudidott
131.114.73.194:studidott4.dm.unipi.it
131.114.73.195:studidott5.dm.unipi.it
131.114.73.196:@CLIstudidott
131.114.73.196:studidott6.dm.unipi.it
131.114.73.197:@CLIstudidott
131.114.73.197:studidott7.dm.unipi.it
131.114.73.198:@CLIstudidott
131.114.73.205:cardano.dm.unipi.it
131.114.73.209:pico.dm.unipi.it
131.114.73.221:posso1.dm.unipi.it
131.114.73.222:posso2.dm.unipi.it
131.114.73.223:posso3.dm.unipi.it
131.114.73.224:posso4.dm.unipi.it
131.114.73.225:posso5.dm.unipi.it
131.114.73.227:posso7.dm.unipi.it
131.114.73.228:posso8.dm.unipi.it
131.114.73.229:posso9.dm.unipi.it
131.114.73.230:posso10.dm.unipi.it
131.114.73.72:cluster2.dm.unipi.it
131.114.73.74:cluster4.dm.unipi.it
131.114.73.75:cluster5.dm.unipi.it
131.114.73.76:cluster6.dm.unipi.it
131.114.73.77:cluster7.dm.unipi.it
131.114.73.91:ssh1.dm.unipi.it
131.114.73.92:ssh2.dm.unipi.it
192.168.1.0/24,lgauss.private:/space/deleted_users_gauss
192.168.1.0/24,lpico.private:/data/home/posso
192.168.1.0/24:/data
192.168.1.12:192.168.1.0/24,lpico.private
192.168.1.1:/data
192.168.1.1:/oldmail
192.168.1.1:lmail.private
192.168.1.246:192.168.1.0/24
192.168.1.3:192.168.1.0/24
192.168.1.5:192.168.1.0/24,lgauss.private
@CLIstudidott:/data/home/dottorandi
cardano.dm.unipi.it:/data/home/posso
cluster2.dm.unipi.it:/data
cluster2.dm.unipi.it:/space/share
cluster4.dm.unipi.it:/data
cluster4.dm.unipi.it:/space/share
cluster5.dm.unipi.it:/data
cluster5.dm.unipi.it:/space/share
cluster6.dm.unipi.it:/data
cluster6.dm.unipi.it:/space/share
cluster7.dm.unipi.it:/data
cluster7.dm.unipi.it:/space/share
dott1.dm.unipi.it:/data
dott1.dm.unipi.it:/space/share
dott10.dm.unipi.it:/data
dott10.dm.unipi.it:/space/share
dott11.dm.unipi.it:/data
dott11.dm.unipi.it:/space/share
dott12.dm.unipi.it:/data
dott12.dm.unipi.it:/space/share
dott2.dm.unipi.it:/data
dott2.dm.unipi.it:/space/share
dott3.dm.unipi.it:/data
dott3.dm.unipi.it:/space/share
dott4.dm.unipi.it:/data
dott4.dm.unipi.it:/space/share
dott5.dm.unipi.it:/data
dott5.dm.unipi.it:/space/share
dott6.dm.unipi.it:/data
dott6.dm.unipi.it:/space/share
dott7.dm.unipi.it:/data
dott7.dm.unipi.it:/space/share
dott8.dm.unipi.it:/data
dott8.dm.unipi.it:/space/share
dott9.dm.unipi.it:/data
dott9.dm.unipi.it:/space/share
lab1.dm.unipi.it:/data
lab1.dm.unipi.it:/space/share
lab10.dm.unipi.it:/data
lab10.dm.unipi.it:/space/share
lab11.dm.unipi.it:/data
lab11.dm.unipi.it:/space/share
lab12.dm.unipi.it:/data
lab12.dm.unipi.it:/space/share
lab13.dm.unipi.it:/data
lab13.dm.unipi.it:/space/share
lab14.dm.unipi.it:/data
lab14.dm.unipi.it:/space/share
lab15.dm.unipi.it:/data
lab15.dm.unipi.it:/space/share
lab16.dm.unipi.it:/data
lab16.dm.unipi.it:/space/share
lab17.dm.unipi.it:/data
lab17.dm.unipi.it:/space/share
lab18.dm.unipi.it:/data
lab18.dm.unipi.it:/space/share
lab19.dm.unipi.it:/data
lab19.dm.unipi.it:/space/share
lab2.dm.unipi.it:/data
lab2.dm.unipi.it:/space/share
lab20.dm.unipi.it:/data
lab20.dm.unipi.it:/space/share
lab21.dm.unipi.it:/data
lab21.dm.unipi.it:/space/share
lab22.dm.unipi.it:/data
lab22.dm.unipi.it:/space/share
lab23.dm.unipi.it:/data
lab23.dm.unipi.it:/space/share
lab24.dm.unipi.it:/data
lab24.dm.unipi.it:/space/share
lab25.dm.unipi.it:/data
lab25.dm.unipi.it:/space/share
lab26.dm.unipi.it:/data
lab26.dm.unipi.it:/space/share
lab3.dm.unipi.it:/data
lab3.dm.unipi.it:/space/share
lab4.dm.unipi.it:/data
lab4.dm.unipi.it:/space/share
lab5.dm.unipi.it:/data
lab5.dm.unipi.it:/space/share
lab6.dm.unipi.it:/data
lab6.dm.unipi.it:/space/share
lab7.dm.unipi.it:/data
lab7.dm.unipi.it:/space/share
lab8.dm.unipi.it:/data
lab8.dm.unipi.it:/space/share
lab9.dm.unipi.it:/data
lab9.dm.unipi.it:/space/share
lmail.private:/space/oldmail
pico.dm.unipi.it:/data/home/posso
posso1.dm.unipi.it:/data/home/posso
posso10.dm.unipi.it:/data/home/posso
posso2.dm.unipi.it:/data/home/posso
posso3.dm.unipi.it:/data/home/posso
posso4.dm.unipi.it:/data/home/posso
posso5.dm.unipi.it:/data/home/posso
posso6.dm.unipi.it:/data/home/posso
posso7.dm.unipi.it:/data/home/posso
posso8.dm.unipi.it:/data/home/posso
posso9.dm.unipi.it:/data/home/posso
ssh1.dm.unipi.it:/data
ssh1.dm.unipi.it:/space/share
ssh2.dm.unipi.it:/data
ssh2.dm.unipi.it:/space/share
studidott1.dm.unipi.it:/data/home/dottorandi
studidott2.dm.unipi.it:/data/home/dottorandi
studidott3.dm.unipi.it:/data/home/dottorandi
studidott4.dm.unipi.it:/data/home/dottorandi
studidott5.dm.unipi.it:/data/home/dottorandi
studidott6.dm.unipi.it:/data/home/dottorandi
studidott7.dm.unipi.it:/data/home/dottorandi
temp5.dm.unipi.it:/data
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@lab6 steffe]$ ls -la /net/share/
total 10148
drwxr-xr-x 24 root root 4096 Oct 23 14:31 .
drwxr-xr-x 5 root root 0 Nov 2 18:07 ..
drwxr-xr-x 2 root root 4096 Sep 29 2006 acl
-rwxr-xr-x 1 root root 69 Nov 9 2004 aggiustanag.sh
drwxr-xr-x 23 root root 4096 Dec 4 2006 apps
drwxr-xr-x 2 root root 4096 Mar 27 2007 audacity
-rw-r--r-- 1 root root 4019856 Apr 19 2005 boot.dott.tgz
drwxr-xr-x 2 root root 4096 Jun 4 2003 checklogin
drwxr-xr-x 35 root root 4096 May 4 2006 client
-rw-r--r-- 1 root root 2214 May 9 2006 client.conf
-rw-r--r-- 1 root root 21 Mar 17 2004 corso_steffe
-rw-r--r-- 1 root root 2489495 May 10 2006 cups-1.1.17-0.9.i386.rpm
drwxr-xr-x 3 root root 4096 Mar 14 2005 doc
drwxr-xr-x 3 root root 4096 Dec 6 2001 docs
-rw-r--r-- 1 root root 786 Oct 5 2005 dott.acl
-rwxr-xr-x 1 root root 170320 Nov 28 2002 dvips
-rwxr-xr-x 1 root root 211 Jun 6 2006 filtra_spam.sh
-rw-r--r-- 1 root root 159 May 8 2006 filtra_spam.sh~
-rwxr-xr-x 1 root root 98 Aug 4 2003 filtro_pine.sh
-rwxr-xr-x 1 root root 86 Aug 4 2003 filtro_pine.sh~
-rwxr-xr-x 1 root root 113 Aug 4 2003 filtro_spam.sh
-rw-r--r-- 1 root root 107 Aug 4 2003 filtro_spam.sh~
-rwxr-xr-x 1 root root 668 Mar 1 2005 flashpen
-rwxr-xr-x 1 root root 65 Nov 9 2004 .flexlmrc
drwxr-xr-x 2 root root 4096 Mar 14 2005 freeradius
-rw-r--r-- 1 root root 1068 Nov 29 2004 fstab
drwxr-xr-x 3 root root 4096 Feb 18 2005 ghc
-rw-r--r-- 1 root root 40 Jun 19 2003 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 2 root root 4096 Mar 27 2007 java
drwxr-xr-x 3 root root 4096 Oct 16 2002 ks
-rwxr-xr-x 1 root root 82 Jan 12 2004 labkernelupdate.sh
-rwxr-xr-x 1 root root 82 Oct 21 2002 labupdate.sh
drwxr-xr-x 5 root root 4096 Jul 29 2002 live
-rw-r--r-- 1 root root 535 Oct 5 2005 login
-rw-r--r-- 1 root root 13 Oct 11 13:33 lpoptions
drwxr-xr-x 2 root root 4096 Aug 1 2002 mail
-rw-r--r-- 1 root root 7395 Sep 24 2003 named.rev
-rwxr-xr-x 1 root root 189 Sep 24 2003 netmask.sh
-rw-r--r-- 1 root root 29 Sep 24 2003 nologin
-rw-r--r-- 1 root root 57 Jun 6 2006 no_markspam.sh
-rw-r--r-- 1 root root 60 Jan 20 2003 nosound.sh
-rwxr-xr-x 1 root root 367 May 24 2005 ooinstall
drwxr-xr-x 2 root root 4096 Nov 18 2002 openoffice_printers
-rw-r--r-- 1 root root 2218519 Nov 16 2006 pari-2.1.7-1.0.rh9.rf.i386.rpm
-rw-r--r-- 1 root root 1259 May 9 2006 print
-rw-r--r-- 1 root root 1029 May 8 2006 printcap.local
-rwxr-xr-x 1 root root 97 Jul 26 2002 printers.sh
-rwxr-xr-x 1 root root 85 Sep 27 2006 reboot.sh
-rwxr-xr-x 1 root root 528 Sep 24 2003 rename.sh
drwxr-xr-x 2 root root 4096 May 24 2005 scripts
-rwxr-xr-x 1 root root 214 Jun 6 2006 segnala_spam.sh
-rwxr-xr-x 1 root root 210 May 8 2006 segnala_spam.sh~
drwxr-xr-x 2 root root 12288 Jan 16 2003 server
-rwxr-xr-x 1 root root 29 Nov 9 2004 showlicense.sh
drwxr-xr-x 2 root root 4096 Mar 8 2007 singular
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 Nov 27 2003 toexecute
drwxr-xr-x 2 root root 4096 Feb 14 2006 update
-rw-r--r-- 1 root root 21565 May 10 2006 utenti.list
drwxr-xr-x 3 root root 4096 Apr 26 2004 utilities
e inoltre ora abbiamo:
[steffe@lab6 steffe]$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda2 8254272 6662960 1172016 86% /
/dev/hda1 124427 12148 105855 11% /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 37012 1899164 2% /tmp
/dev/hda6 2063504 369676 1589008 19% /var
mail:/data/home 100798072 83460744 12217016 88% /net/home
mail:/data/mail 100798072 83460744 12217016 88% /net/mail
mail:/space/share 80794640 36549728 40140712 48% /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 2007/2008
- PISA