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Diagnostiikka (muokkaa)

Versio 16. toukokuuta 2014 kello 20.32

6 344 merkkiä poistettu ,  16. toukokuuta 2014
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ei muokkausyhteenvetoa
Ei muokkausyhteenvetoa
pEi muokkausyhteenvetoa
 
(9 välissä olevaa versiota 6 käyttäjän tekeminä ei näytetä)
Rivi 1: Rivi 1:
== Laiteviat ==
Laitevikojen paikallistaminen voi olla monesti ainakin aloittelijoille vaikeaa. Seuraavilla neuvoilla voit ehkä selvitä siitäkin.
Laitevikojen paikallistaminen voi olla monesti ainakin aloittelijoille vaikeaa. Seuraavilla neuvoilla voit ehkä selvitä siitäkin.


Rivi 5: Rivi 6:
* Muistit/rauta
* Muistit/rauta
* Ajurit
* Ajurit
* Katso mitä kernel kertoo ([[dmesg]])
* Katso mitä [[Kernel|kernel]] kertoo ([[dmesg]])


Muistia voi testata [http://www.memtest86.com/ Memtest86]-ohjelmalla. Se ei ole Linux-ohjelma, vaan tavallaan oma käyttöjärjestelmänsä, joka ei osaa tehdä mitään muuta kuin testata muistia. Erityisen huomattavaa on kuitenkin se, että muistissa saattaa olla vikaa, vaikkei Memtest sitä löytäisikään ja toisaalta, täysin ehjä muisti voi oireilla, jos vikaa on jossakin muussa oheislaitteessa.  
Muistia voi testata [[Memtest86+]]-ohjelmalla. Se ei ole Linux-ohjelma, vaan tavallaan oma käyttöjärjestelmänsä, joka ei osaa tehdä mitään muuta kuin testata muistia. Erityisen huomattavaa on kuitenkin se, että muistissa saattaa olla vikaa, vaikkei Memtest sitä löytäisikään ja toisaalta, täysin ehjä muisti voi oireilla, jos vikaa on jossakin muussa oheislaitteessa.
 
== Ohjelmistopuolen ongelmat ==
=== Internet-yhteys ===
Aluksi kannattaa tarkistaa <tt>ifconfig:in</tt> tuloste:
/sbin/ifconfig
Jos Internet-yhteys muodostetaan verkkokortin kautta (esim. suurin osa ADSL-yhteyksistä), tulisi tulosteessa näkyä kohta eth0 ja sille seuraavankaltaiset tiedot:
/sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 00:00:0E:9C:C4:82
          inet addr:81.197.59.128  Bcast:81.197.63.255  Mask:255.255.192.0
          inet6 addr: fe80::200:eff:fe9c:c482/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:23706217 errors:0 dropped:0 overruns:0 frame:0
          TX packets:26978922 errors:350 dropped:0 overruns:0 carrier:350
          collisions:0 txqueuelen:1000
          RX bytes:686243052 (654.4 MiB)  TX bytes:1146948764 (1.0 GiB)
Mikäli tulosteessa ei näy muita laitteita kuin lo (loopback), kokeile ottaa laite käyttöön. Ensimmäisen verkkokortin käyttöönoton tulisi onnistua komennolla
/sbin/ifconfig up eth0
Jos kysyt [[apua]] Internet-yhteyden toimimattomuuteen, ifconfig:in tuloste kannattaa yleensä liittää viestiin mukaan.
 
=== Graafinen ympäristö ===
Mikäli graafinen ympäristö ei suostu käynnistymään, tiedostossa <tt>/var/log/Xorg.0.log</tt> on graafisesta ympäristösta huolehtivan X.org:in logi. Siitä voi etsiä EE:llä alkavia rivjeä, jotka kertovat virheistä.
 
[[Apua]] kysyttäessä kannattaa usein littää kysymykseen sekä X.org:in logi että X:n asetustiedosto /etc/X11/xorg.conf.


[[Luokka:Järjestelmä]]
[[Luokka:Järjestelmä]]
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