diaforetikoi pirines - diaforetika runlevels

[Christos Ricudis]

On Tue, 13 Jul 2004 16:21:18 -0700 (PDT)
Alaios <alaios at yahoo.com> wrote:

> Kalispera as ypothesoume oti exoume ena sistima pou pano exei enan pirina me pollous pirines...

oi opoioi exoun ki aytous pollous polypyrhnous pyrhnes pou basizontai se pyrhnes me pyrhnes mesa kai ligous pyrhnes gyrw gyrw. 

> enan pirina gia diaskedasi.... ixo-video-kathe logis usb - modems - isdn kai ena karo akoma pragmata
> enan deytero pirina gia development pou den exei tipota apo ta parapano mias pou den ta xreiazomaste
>  
> enan trito pirina pou xrisimopoieitai gia kapoious pollous dedicated logous kai einai tromera mikros me para poly liga feautures energopoimena....

Thn leksh "ar8rwmata" [3] thn exeis akousei? 

Mporeis poly omorfa na ftiakseis ena kornhlio [1] me mono o,ti sou xreiazetai gia na enypodhmatiseis [2] to systhma, kai na fortwneis apo kei kai pera ola ta ypoloipa dynamika. 

Einai pantws elaxistes oi periptwseis stis opoies 8a xreiastei pragmatika na kaneis kati tetoio. Den exw dei teleytaia kanena systhma (me eksairesh kati diestrammena pou ftiaxnw egw 32 MegaBytiwn RAMos) sto opoio de mporeis na baleis mesa ston kornhlio o,ti sou xreiazetai gia na xrhsimopoihseis to systhma. Mallon kati exeis katalabei la8os ekei. 

> Exoume ena laptop me pollous pirines o kathe enas apo aytoys xrisimopoeitai gia diaforetikous skopous... Ean katafername to parapano pou anefera tote tha mporousame ston pirina to spitiou na sikonetai aytomata to interface tis ethernet me mia sygkekrimeni ip...... ston pirina tis douleias i ethernet na pairnei dynamika tin ip tis apo ton dhcp.... k.l.p

Exeis ontws mpleksei ta ayga me ta pasxalia. 

H aytodiamorfwsh [4] tou IP [5] den einai zhthma kornhliou. O swfer [6] poy xrhsimopoieis einai panta o idios. H diaforetikh diamorfwsh den 8a eprepe kan na einai zhthma trexepipedou [7] - ayto xrhsimopoieitai kyriws otan 8eleis mia SHMANTIKA diaforetikh diamorfwsh ths xrhstopolhs [8] tou systhmatos. Yparxoun arketa ergaleia ta opoia prospa8oun na mantepsoun se poio apo kapoia proka8orismena ypodiktya brisketai o ypologisths sou, psaxnontas na broun gnwstes MAC diey8ynseis sto ypodiktyo - psakse sto FresKreas [9] gia to divine h to columbus - 8a breis polla paromoia ergaleia. 

Se geniko epipedo pantws ayto pou zhtas ginetai ws ekshs : 

Kata thn enypodhmatish tou systhmatos, opoiodhpote apo ta orismata den ginetai katanohto apo ton kornhlio ws diko tou eswteriko orisma, pernietai aytousio ws orisma sthn arxik [10] - h opoia to eklambanei ws to epi8ymhto trexepipedo, koitazei sto arxeio ry8misewn /klp/arxiksthl [11] kai ektelei ta analoga programmata (synh8ws floiosenaria [12]) analogws me to trexepipedo pou epelekse o xrhsths. 

Etsi, an sto lilo dwsoume p.x. : 

linux ro 5

to "ro" ginetai katanohto apo ton kornhlio ws diko tou eswteriko orisma, to 5 omws oxi, opote apo kei kai pera analambanei h arxik [10] na ksekinhsei to systhma sto trexepipedo 5. 

Gia na ftiakseis ena diko sou trexepipedo, arkei na deis PWS einai ftiagmenh h domh twn floiosenariwn ekkinhshs poy 8a breis gia ka8e trexepipedo sto /klp/arxiksthl [11] kai na ftiakseis analogws ta dika sou. 




[1] Eimai fanatikos ypermaxos ekeinhs ths kinhshs tou Korah gia ton ekswraismo ths malliarhs dhmotikhs kai ton symbibasmo ths me ton akampto formalismo ths ka8areyousas. Lew "Opsarion" loipon anti gia to kakohxo "Psari" kai "Kornhlios" anti gia to xwriatiko "Kernoulas". 

[2] anti gia to ksenoferto, barbariko "Bootarw". 

[3] anti gia to akatalhpto "modules".

[4] anti gia thn agglikoura "autoconfiguration"

[5] dystyxws den exei epikrathsei sthn ka8omiloumenh o kalyteros oros "Prwtokollo Diadiktyou" 

[6] driver

[7] runlevel 

[8] userland

[9] www.freshmeat.net

[10] arxik : Basiko programma poy analambanei thn diaxeirish kai arxikopoihsh ths xrhstopolhs [8] tou systhmatos. Kanei rima me to sygkrothma "Antique", kai se orismena palaias texnologias mh-eksellhnismena UNIX systhmata synantatai ws "init". 

[11] /etc/inittab

[12] ayto breite to monoi sas



-- 
Christos Ricudis				ricudis at itc.auth.gr
Systems Administrator				+30-2310-998305
IT Support Center
Aristotles University of Thessaloniki, GREECE