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OMICRON ECHO #02

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OMICRON ECHO
 · 8 months ago

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OMICRON ECHO 2 16. brezna 1993

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OBSAH: UVOD
1. GOPHER a NEWS
2. WWW a NEWS
3. E-DOPIS do NEWS

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UVOD

V posledni dobe se znacne zvysil zajem uzivatelu v CR i v SR o sledovani
NEWS. Na nekterych uzlech nasich siti jsou ctecky NEWS, na "aci.cvut.cs"
je NNTP server, pokusny NNTP server bezi na VISION1.FELK.CVUT.CS, v kursech
OMICRON typu C byla tato problematika probirana spolu se systemy GOPHER, WAIS
a WWW a na seminari 10.3.93 se touto problematikou zabyvalo nekolik referatu.
V konferencich csinfo-l a net se objevuji prispevky k otazkam NEWS. Proto
do tototo cislo obcasniku OMICRON ECHO byl zarazen prispevek ke vztahu NEWS
GOPHER a WWW.
Vladimir Vrabec
vrabec@vax.felk.cvut.cs


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1. GOPHER a NEWS

Systemy typu GOPHER nam umoznuji sledovat NEWS (NetNews, USENET News,...),
aniz bychom meli k dispozici ctecky NEWS. To je nekdy dosti vyhodne, napr. kdyz
jsme nuceni pracovat s NNTP sluzbou, ktera neobsahuje nami pozadovanou skupinu
nebo ktera pracuje pomalu a s chybami. Pripomenme, ze pokud pracujeme s lokalnim
klientem systemu GOPHER, lze obvykle precteny prispevek NEWS ulozit do
lokalniho souboru (SAVE), pokud pracujeme s nelokalnim klientem, lze ho obvykle
poslat na vhodnou adresu (MAIL).

Gopherske "servery", ktere obsahuji NEWS, lze zjistovat systemem Veronica
s pouzitim klicovych slov "NetNews","USENET","NEWS" a pod. Vyuzivame algoritmus
vyhledavajici typ menu "adresar". Tak napr. pri klicovem slove "NetNews"
dostaneme virtualni menue o nekolika radcich, mezi nimiz je radek "Zugang zu
Netnews (usenet-news)" aktivizujici NEWS na "serveru" nemecke university v
ERLANGEN (pro nastaveni lokalniho klienta lze pouzit adresu tohoto serveru
cd4680fs.rrze.uni-erlangen.de a port 4320). Tento gophersky "server" pokryva
dosti sirokou skalu skupin NEWS. Nelokalnim klientem jej lze dosahnout
gopherskou cestou GOPHERS IN EUROPE, INFORMATION SERVERS IN GERMANY, UNI
ERLANGEN-GOPHER. K NEWS se dostaneme pres menu INFORMATIONSDIENSTE, ZUGANG ZU
NETNEWS.

Pouzijeme-li "Search gopherspace for directories by veronica:
usenet netnews", ziskame tristrankove virtualni menu, ve kterem lze
najit nejen moznosti dalsiho pristupu k NEWS, ale i radky menu, ktere
vedou k elektronicke literature o NetNews. V nasledujici tabulce uvadime
z tohoto menu nektere polozky vedouci k zajimavym e-clankum.

jupiter.sun.csd.unb.ca 70 Usenet News and Usenet related listings
jupiter.sun.csd.unb.ca 70 Some introductory articles from UseNet News
julian.uwo.ca 70 What-is-usenet
saturn.soils.umn.edu 70 Potentially Useful Postings from Usenet
gopher.uchicago.edu The Wonderful World of Usenet News.

Dalsi tabulka ukazuje nektere polozky umoznujici pristup k omezenemu
rozsahu NEWS.

dns0.bham.ac.uk 70 Alternate Usenet Hierarchies
dns0.bham.ac.uk 70 Mainstream Usenet Groups
enuxva.eas.asu.edu 9000 General Usenet Stuff
joyx.joensuu.fi 70 Verkkouutiset - Netnews
NEWS.

Pouzijeme-li "Search gopherspace for directories by veronica:
usenet netnews", ziskame tristrankove virtualni menu, ve kterem lze
najit nejen moznosti dalsiho pristupu k NEWS, ale i radky menu, ktere
vedou k elektronicke literature o NetNews. V nasledujici tabulce uvadime
z tohoto menu nektere polozky vedouci k zajimavym e-clankum.

jupiter.sun.csd.unb.ca 70 Usenet News and Usenet related listings
jupiter.sun.csd.unb.ca 70 Some introductory articles from UseNet News
julian.uwo.ca 70 What-is-usenet
saturn.soils.umn.edu 70 Potentially Useful Postings from Usenet
gopher.uchicago.edu The Wonderful World of Usenet News.

Dalsi tabulka ukazuje nektere polozky umoznujici pristup k omezenemu
rozsahu NEWS.

dns0.bham.ac.uk 70 Alternate Usenet Hierarchies
dns0.bham.ac.uk 70 Mainstream Usenet Groups
enuxva.eas.asu.edu 9000 General Usenet Stuff
joyx.joensuu.fi 70 Verkkouutiset - Netnews
knot.queensu.ca 17502 Complete Netnews
rs6000.bham.ac.uk 4320 Browse the Usenet News.

Mezi dalsi zname gopherske "servery" obsahujici sirsi skupiny NEWS patri

nuinfo.nwu.edu 4321 (Northwestern University, USA)
pereiii.uji.es 4320 (Universitat Jaume I, Spain)
info.mcc.ac.uk 4320 (University of Manchester, UK)
ashpool.micro.umn.edu 4324 (University of Minesota, USA)
mordor.stanford.edu 70 (Stanford University, USA)
info.anu.edu.au 71 (Australian National University)
aurora.latech.edu 70 (Luisiana Tech University, USA)
tolten.puc.cl 72 (Pontificia Universidad Catolica de Chile).

Pristup k gopherskym "serverum" realizujeme nastavenim lokalnich
klientu (adresa, port) a pokud pouzivame nelokalni klienty napr.

telnet gopher.chalmers.se, login gopher
telnet finfo.tu-graz.ac.at, login info
telnet lanka.ccit.arizona.edu, login www,

tak primo vyvolavanim prvku virtualniho menu vytvoreneho systemem Veronica.
Klienta "sun.uakom.cs" doporucujeme pouzivat az bude z SR prime spojeni
do Internetu, jinak zbytecne budeme pretezovat pomalou linku Praha - Banska
Bystrica.

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2. WWW a NEWS

Podobne jako pomoci systemi GOPHER, lze NEWS cist sytemem WWW. Nelze vsak
zatim zajimave clanky ulozit jako soubory nebo si je poslat e-postou. Pri
pouziti WWW je mozne ziskat kopii clanku pouze snimanim obsahu obrazovky.

Priklad vyvolani dosti sirokeho rozsahu NEWS:

telnet lanka.ccit.arizona.edu login:www

vyber polozku USENET News ... 6,
pak All the News Group ...... 1,
ziskame seznam 1790 skupin NEWS, ve kterem se muzeme pohybovat volbou cisel
nebo prikazem "go" ( go soc.culture.czecho-slovak ),
praci ukoncujeme prikazem Quit a nakonec vyberem radky menu 8

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3. E-DOPIS do NEWS

Muzeme-li pomoci systemu GOPHER a WWW clanky z NEWS pouze cist, vznika
problem jak bez pomoci ctecky zaslat do NEWS svuj prispevek. Tuto situaci
nam resi napr. e-postovni obsluzne systemy zarazujici do NEWS dosle e-dopisy.
Jednim z techto obsluznych systemu je "skupina-podskupina@cs.utexas.edu".
Chceme-li napr. do "misc.test" zaslat testovaci e-dopis, tak tento text zasleme
na adresu "misc-test@cs.utexas.edu". Text bude zarazen do "misc.test" s radkem
SUBJECT pouzitym pri zaslani e-dopisu. Pokud radek SUBJECT neobsahuje retezec
"Ignore" nebo "No Reply", tak automaticke systemy sledujici skupiny "*.test"
nam zaslou hlaseni, ze nas e-dopis byl detekovan. Pozor! Testovaci dopisy
zasilejte pouze do skupin "*.test" (napr. "misc.test"), jinak zanasite do
NEWS nezadouci informacni sum a riskujete pokarani spravcem prislusne skupiny.
Presto jsem, abych predesel nejasnostem, poslal timto zpusobem dnes do
"soc.culture.czecho-slovak" e-dopis se "SUBJECT:test, ignore" s textem
"using soc-culture-czecho-slovak@cs.utexas.edu". E-dopis byl do skupiny
zarazen.

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