University of Pisa Computer Science Department System Administration Processi, task periodici,...
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University of Pisa Computer Science Department System Administration Processi, task periodici, stampa Stefano Bistarelli University of Pisa Computer Science Department [email protected] http://www.di.unipi.it/~bista/
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Transcript of University of Pisa Computer Science Department System Administration Processi, task periodici,...
University of PisaComputer Science Department
System Administration
Processi, task periodici, stampa
Stefano Bistarelli
University of PisaComputer Science [email protected]://www.di.unipi.it/~bista/
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Outline
lun mar mer gio ven sab dom
1 2 3 4 5 6 7
8 9 10 11 lab 12 lab 13 14
15 lab 16 17 18 lab 19 lab 20 21
22 lab 23selfstudy 24 25lab 26 lab 27 28
29 lab 30 selfstudy 31
2001
Gennaio
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Outline
lun mar mer gio ven sab dom
1 2 lab 3 4
5 lab 6 7 Ripasso in
aula / Selfstudy 8 lab 9l ab 10 11
12 Exam 13 Exam 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28
2001
Febbraio
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Prima Settimana
9Introduzione
W2K•Installazione win2K (anche studenti)•Backup
Riferimenti:-Lucidi-Cap 1,2,15 libro
10W2K•registri•Active Directory•Gestione computer
Linux-Installazione Linux
Riferimenti:-Lucidi-Cap 4,5 libro-RH inst.guide
11 lab
-Linux utente1
12 lab
-Linux utente2
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Seconda settimana
15 lab 16W2K•Booting and ShutdownDisco ripristino
Linux•Booting and Shutdown•Inst. Linux (studenti)
Riferimenti:-Lucidi- fotocopie
17W2K•Utenti
Linux•Backup•multi boot•Utenti•superuser
Riferimenti:-Libro Cap. 7-Lucidi- fotocopie
18 lab 19 lab
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
terza settimana
22 lab 23 24W2K•Device•Disk•fs
Linux•Device•Disk•fs
Riferimenti:-Libro Cap. 8-Lucidi- fotocopie
25 lab 26 lab
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
quarta settimana
29 lab 30 31W2K•processi•Task periodici•stampa
Linux•processi•Task periodici•stampa
Riferimenti:-Libro Cap. -Lucidi- fotocopie
1W2K•processi•Task periodici•stampa
Linux•processi•Task periodici•stampa
Riferimenti:-Libro Cap. -Lucidi- fotocopie
2 lab
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Processi - linux
Time slicing cpu piu’processi in esecuzione! Nel kernel per ogni processo
Pezzo di memoria riservata con dentro Codice Variabili Stack
Strutture dati Process address space Stato del processo Priorità esecuzione Risorse Signal mask Owner (EUID)
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Per ogni processo
PID,PPID RUID,RGID EUID,EGID Priority (+19 -- -19) (migliore è –19)
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
creazione
P1 fork
P1
P1exec
P2
exit
wait
P2 = zombi
P2 = dead
E se muore il padre prima della wait?
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Comando ps
Volontario per man ps
Volontario per significato segnali Kill,stop,cont,hup
Regola: Kill –1 prima di kill –9
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Stati di un processo
sleeping
runnable
stopped
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Comandi
Nice Renice Nohup
3 volontari!!
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
scheduling
At /etc/at.allow Atq Atrm batch
at
atrm
Ogni 15 min
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
cron
Cron.allow
crontab
crond
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
Struttura crontab
Mostrare crontab
dr. Stefano Bistarelli: System AdministrationUniversity of PisaComputer Science Department
win2k
Job Processi
Thread
Taskman Perfmon
