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The cpufreq speedstepping in the 2.6.10 kernel works fine (without any patch). However it boots up with the userspace cpufreq-govenor which means that it does not take command over the setting the cpu frequencies itself. A echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor on boot fixes this (I made a small init.d-script for this). You can check the current cpu-freq with cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq and you can tweak the ondemand governor by setting the values in /sys/devices/system/cpu/cpu0/cpufreq/ondemand (I haven’t though).
# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 13 model name : Intel(R) Pentium(R) M processor 1.70GHz stepping : 6 cpu MHz : 1695.100 cache size : 2048 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr mce cx8 sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe est tm2 bogomips : 3358.72
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
give the available governors:
To change the governor just use the echo command like this:
# echo "performance" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
where you can replace performance by all governors available.
fonte: http://www.thinkwiki.org/wiki/How_to_make_use_of_Dynamic_Frequency_Scaling
per lo script init.d vedere Debian System V Init
Se si vuole risalire al nome del servizio che utilizza uno specifico numero di porta, utilizzare lsof -i specificando il numero della porta (nr. 22 nell’esempio) ed il tipo di protocollo (es. TCP):
# lsof -i tcp:22 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME ssh 5631 rbnet 3u IPv4 17767 TCP xxxx:xxxxx->xxxx:ssh (ESTABLISHED)
E’ possibile passare al comando lsof indirizzi multipli (fino a 100), sempre premettendo ad ogni coppia protocollo:nr.porta l’opzione -i - esempio:
# lsof -i tcp:22 -i tcp:80 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME firefox-b 4243 rbnet 24u IPv4 19804 TCP xxx:xxxxx->151.1.xxx.xxx:www (ESTABLISHED) ssh 5901 rbnet 3u IPv4 19774 TCP xxxx:xxxxx->xxxx:ssh (ESTABLISHED)
fonte: http://forum.html.it/forum/showthread.php?s=&threadid=872697
Utilizzare il comando du:
rbnet@debian64:~$ time su -c "du -shc /*" Password: 3,8M /bin 14M /boot 0 /cdrom 281K /dev 34M /emul 7,1M /etc 672M /home 0 /initrd 127M /lib 0 /lib64 0 /media 0 /mnt 0 /opt 1,1G /proc 3,1M /root 5,0M /sbin 0 /srv 0 /sys 36K /tmp 1,7G /usr 2,1G /var 5,5G totale real 0m4.730s user 0m0.215s vsys 0m0.854s
Se si sono montano delle condivisioni NFS o partizioni separate è preferibile utilizzare df -k ed usare du solo per la parte restante del file system, velocizzando così l’elaborazione del comando.
fonte: http://forum.html.it/forum/showthread.php?s=&threadid=918018
Eseguire il comando lspci -n in una console, es:
rbnet@mylinuxbox:~$ lspci -n 0000:00:00.0 0600: 10de:00e1 (rev a1) 0000:00:01.0 0601: 10de:00e0 (rev a2) 0000:00:01.1 0c05: 10de:00e4 (rev a1) 0000:00:02.0 0c03: 10de:00e7 (rev a1) 0000:00:02.1 0c03: 10de:00e7 (rev a1) 0000:00:02.2 0c03: 10de:00e8 (rev a2) 0000:00:05.0 0680: 10de:00df (rev a2) 0000:00:06.0 0401: 10de:00ea (rev a1) 0000:00:08.0 0101: 10de:00e5 (rev a2) 0000:00:09.0 0101: 10de:00ee (rev a2) 0000:00:0b.0 0604: 10de:00e2 (rev a2) 0000:00:0e.0 0604: 10de:00ed (rev a2) 0000:00:18.0 0600: 1022:1100 0000:00:18.1 0600: 1022:1101 0000:00:18.2 0600: 1022:1102 0000:00:18.3 0600: 1022:1103 0000:01:00.0 0300: 10de:0042 (rev a1) 0000:02:0c.0 0c00: 1106:3044 (rev 46) 0000:02:0d.0 0200: 10ec:8169 (rev 10)
Copiare l’output ed incollarlo nel sito http://kmuto.jp/debian/hcl/index.cgi
fonte: http://daniele.wordpress.com/2006/03/06/hardware-check/
Digitare il comando:
mount -o loop immagine.iso /mnt/dir_a_scelta/
Per maggiorni informazioni:
man mount
Modificare il file:
vim /etc/default/bootlogd
ed attivare l’opzione BOOTLOGD_ENABLE impostandola su Yes. Ora tutti i messaggi di boot, compresi quelli diretti a stderr 1), verranno salvati in /var/log/boot.