📄 host.1
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2910(mention)S3271(that)S3454(fact.)S3688(If)S3788(a)S3865(system)S4176(has)S4342(a)S4419("mail)S4671(is)S4770(handled)S5120(by")S5808 V1080(entry,)S1344(but)S1504(no)S1636(address,)S1995(this)S2172(indicates)S2562(that)S2745(it)S2833(is)S2932(not)S3092(really)S3354(part)S3543(of)S3658(the)S3812(Internet,)S4182(but)S4341(a)S4417(system)S4727(that)S4909(is)S5007(on)S5138(the)S5928 V1080(network)S(will)157 1450 A1647(forward)S2007(mail)S2227(to)S2346(it.)S2493(Systems)S2869(on)S3010(Usenet,)S3356(Bitnet,)S3668(and)S3854(a)S3940(number)S4288(of)S4413(other)S4661(networks)S5071(have)S6048 V1080(entries)S1374(of)S1483(this)S1653(kind.)S6216 V1080(There)S1344(are)S1496(a)S1569(number)S1904(of)S2016(options)S2339(that)S2518(can)S2686(be)S2809(used)S3021(before)S3307(the)S3458(host)S3653(name.)S3949(Most)S4183(of)S4296(these)S4532(options)S4856(are)S5009(mean-)S6336 V1080(ingful)S1345(only)S1548(to)S1651(the)S1799(staff)S2004(who)S2202(have)S2417(to)S2520(maintain)S2897(the)S3045(domain)S3371(database.)S6504 V1080(The)S1276(option)S1571(-w)S1717(causes)S2019(host)S2225(to)S2342(wait)S2555(forever)S2886(for)S3043(a)S(response.)377 3127 A3568(Normally)S3993(it)S(will)157 4088 A4284(time)S4503(out)S4671(after)S(around)279 4897 A5216(a)S6624 V1080(minute.)S6792 V1080(The)S1269(option)S1557(-v)S1673(causes)S1968(printout)S2318(to)S2428(be)S2555(in)S2666(a)S2744("verbose")S3172(format.)S3524(This)S3736(is)S3836(the)S3992(of\256cial)S4311(domain)S4645(master)S4947(\256le)S5109(for-)S6912 V1080(mat,)S1288(which)S1566(is)S1665(documented)S2188(in)S2298(the)S2453(man)S2658(page)S2880(for)S3030("named".)S(Without)329 3462 A3823(this)S4000(option,)S4313(output)S(still)151 4601 A4783(follows)S5116(this)S7032 V1080(format)S1397(in)S1523(general)S1868(terms,)S2165(but)S2341(some)S2601(attempt)S2951(is)S3066(made)S3332(to)S3458(make)S3724(it)S3828(more)S(intelligible)436 4083 A4568(to)S4695(normal)S5029(users.)S7152 V(Without)329 1080 A1438(-v,)S1576("a",)S1757("mx",)S2021(and)S2195("cname")S2569(records)S2895(are)S(written)286 3048 A3363(out)S3520(as)S3633("has)S3837(address",)S4233("mail)S4481(is)S4576(handled)S4922(by",)S5116(and)S7272 V1080("is)S1213(a)S1283(nickname)S1699(for",)S1908(and)S(TTL)186 2078 A2289(and)S2459(class)S2680(\256elds)S2923(are)S3072(not)S3225(shown.)S7903 V720(Page)S941(1)S4455(September)S4911(13,)S(1996)200 5061 A8143 VEP%%Page: 2 2BP/slant 0 def/height 0 def480 V10 R720(HOST)S992(\()S1034(1)S1092(\))S2696(Eighth)S(Edition)296 2989 A4855(HOST)S5127(\()S5169(1)S5227(\))S960 V1080(The)S1272(option)S1563(-r)S1666(causes)S1964(recursion)S2374(to)S2487(be)S2617(turned)S2909(off)S3063(in)S3177(the)S3336(request.)S3713(This)S3928(means)S4221(that)S4408(the)S4567(name)S4821(server)S(will)157 5104 A1080 V1080(return)S1346(only)S1549(data)S1742(it)S1823(has)S1982(in)S2085(its)S2205(own)S2403(database.)S2825(It)S(will)157 2912 A3094(not)S3247(ask)S3406(other)S3638(servers)S3949(for)S4092(more)S4324(information.)S1248 V1080(The)S1262(option)S1543(-d)S1652(turns)S1878(on)S(debugging.)448 2003 A2501(Network)S2879(transactions)S3385(are)S3534(shown)S3821(in)S3924(detail.)S1416 V1080(The)S1262(option)S1543(-t)S1630(allows)S(you)150 1918 A2094(to)S2198(specify)S2515(a)S2586(particular)S2999(type)S3198(of)S3308(information)S3809(to)S3913(be)S(looked)273 4034 A4333(up.)S4509(The)S4692(arguments)S5137(are)S1536 V1080(de\256ned)S1402(in)S1506(the)S1655(man)S1854(page)S2070(for)S2214("named".)S2640(Currently)S(supported)396 3052 A3473(types)S3710(are)S3859(a,)S3954(ns,)S4093(md,)S4271(mf,)S4433(cname,)S4746(soa,)S4930(mb,)S5108(mg,)S1656 V1080(mr,)S1245(null,)S1454(wks,)S1669(ptr,)S1834(hinfo,)S2099(minfo,)S2392(mx,)S2573(uinfo,)S2838(uid,)S3019(gid,)S3200(unspec,)S3532(and)S3705(the)S3856(wildcard,)S4262(which)S4536(may)S4738(be)S(written)286 4862 A5177(as)S1776 V1080(either)S1344("any")S1605(or)S1723("*".)S1939(Types)S2219(must)S2448(be)S2577(given)S2833(in)S2944(lower)S3207(case.)S3464(Note)S3693(that)S3877(the)S4033(default)S4346(is)S4446(to)S(look)178 4557 A4768(\256rst)S4958(for)S5109("a",)S1896 V1080(and)S1250(then)S1448("mx",)S1708(except)S1996(that)S2172(if)S2259(the)S2407(verbose)S2745(option)S3026(is)S3118(turned)S3400(on,)S3550(the)S3698(default)S4003(is)S4095(only)S4298("a".)S2064 V1080(The)S1262(option)S1543(-a)S1647(\(for)S1824("all"\))S2066(is)S2158(equivalent)S2602(to)S2705("-v)S2855(-t)S2942(any".)S2232 V1080(The)S1262(option)S1543(-l)S1630(causes)S1918(a)S1988(listing)S2264(of)S2373(a)S2443(complete)S2837(domain.)S3213(E.g.)S2352 V1155(host)S1347(-l)S1434(rutgers.edu)S2472 V(will)157 1080 A1263(give)S1462(a)S1533(listing)S1810(of)S1920(all)S2047(hosts)S2279(in)S2383(the)S2532(rutgers.edu)S3008(domain.)S3385(The)S3568(-t)S3656(option)S3938(is)S4031(used)S4241(to)S4345(\256lter)S4563(what)S4786(information)S2592 V1080(is)S1175(presented,)S1614(as)S(you)150 1726 A1904(would)S2182(expect.)S2522(The)S2706(default)S3013(is)S3107(address)S3436(information,)S3963(which)S4236(also)S4425(include)S4748(PTR)S4960(and)S5132(NS)S2712 V1080(records.)S1452(The)S1634(command)S2832 V1155(host)S1347(-l)S1434(-v)S1543(-t)S1630(any)S1800(rutgers.edu)S2952 V(will)157 1080 A1281(give)S1498(a)S1587(complete)S2000(download)S2440(of)S2568(the)S2735(zone)S2969(data)S3181(for)S3343(rutgers.edu,)S3862(in)S3984(the)S4151(of\256cial)S4481(master)S4794(\256le)S4967(format.)S3072 V1080(\(However)S1520(the)S1679(SOA)S1917(record)S2211(is)S2314(listed)S2568(twice,)S2848(for)S3002(arcane)S3302(reasons.\))S3724(NOTE:)S4058(-l)S4156(is)S4258(implemented)S4818(by)S4953(doing)S5216(a)S3192 V1080(complete)S1483(zone)S1707(transfer)S2050(and)S2229(then)S2436(\256ltering)S2789(out)S2951(the)S3108(information)S3617(the)S(you)150 3774 A3959(have)S4184(asked)S4448(for.)S4651(This)S4865(command)S3312 V(should)267 1080 A1372(be)S1492(used)S1701(only)S1904(if)S1991(it)S2072(is)S2164(absolutely)S(necessary.)417 2602 A3480 V9 R720(C)S722(CU)S784(US)S852(ST)S904(TO)S962(OM)S1030(MI)S1112(IZ)S1145(ZI)S1203(IN)S1236(NG)S1304(G)S1410(H)S1412(HO)S1480(OS)S1548(ST)S1600(T)S1696(N)S1698(NA)S1766(AM)S1834(ME)S1916(E)S2012(L)S2014(LO)S2072(OO)S2140(OK)S2208(KU)S2276(UP)S2344(P)S3600 V10 R1080(In)S1193(general,)S1544(if)S1635(the)S1787(name)S(supplied)340 2034 A2403(by)S2532(the)S2684(user)S2881(does)S3094(not)S3252(have)S3472(any)S3647(dots)S3844(in)S3952(it,)S4063(a)S4138(default)S4448(domain)S4779(is)S4876(appended)S3720 V1080(to)S1189(the)S1343(end.)S1569(This)S1779(domain)S2111(can)S2282(be)S2408(de\256ned)S2734(in)S2842(/etc/resolv.conf,)S3521(but)S3679(is)S3776(normally)S4169(derived)S4501(by)S4631(taking)S4912(the)S5065(local)S3840 V1080(hostname)S1490(after)S1701(its)S1821(\256rst)S2003(dot.)S2206(The)S2388(user)S2581(can)S2746(override)S3108(this,)S3304(and)S3475(specify)S3792(a)S3863(different)S4237(default)S4543(domain,)S4895(using)S5138(the)S3960 V1080(environment)S1614(variable)S10 I1965(LOCALDOMAIN)S10 R2680(.)S2756(In)S(addition,)354 2866 A3246(the)S3394(user)S3587(can)S(supply)267 3752 A4044(his)S4186(own)S4384(abbreviations)S4951(for)S5094(host)S4080 V1080(names.)S1414(They)S(should)267 1648 A1942(be)S2064(in)S2169(a)S2241(\256le)S2397(consisting)S2831(of)S2942(one)S3114(line)S3292(per)S3449(abbreviation.)S4030(Each)S4260(line)S4439(contains)S4802(an)S4925(abbrevi-)S4200 V1080(ation,)S1342(a)S(space,)249 1423 A1708(and)S1889(then)S2098(the)S2257(full)S2433(host)S2636(name.)S2940(This)S3155(\256le)S3319(must)S3549(be)S3679(pointed)S4015(to)S4128(by)S4263(an)S4393(environment)S4936(variable)S4320 V10 I1080(HOSTALIASES)S10 R1716(,)S1766(which)S2037(is)S2129(the)S2277(name)S2520(of)S2629(the)S2777(\256le.)S4488 V9 R720(S)S722(Se)S774(ee)S817(e)S883(A)S885(Al)S953(ls)S980(so)S1017(o)S4608 V10 R1080(named)S1373(\(8\))S4776 V9 R720(B)S722(BU)S784(UG)S852(GS)S920(S)S4896 V10 R1080(Unexpected)S1601(effects)S1911(can)S2091(happen)S2421(when)S(you)150 2679 A2869(type)S3082(a)S3167(name)S3425(that)S3616(is)S3723(not)S3891(part)S4088(of)S4212(the)S4375(local)S4611(domain.)S5003(Please)S5016 V1080(always)S1387(keep)S1604(in)S1709(mind)S1942(the)S2092(fact)S2271(that)S2449(the)S2599(local)S2822(domain)S3149(name)S3393(is)S3486(tacked)S3775(onto)S3979(the)S4128(end)S4299(of)S4409(every)S4659(name,)S4928(unless)S5205(it)S5136 V1080(ends)S1289(in)S1392(a)S1462(dot.)S1665(Only)S1891(if)S1978(this)S2148(fails)S2347(is)S2439(the)S2587(name)S2830(used)S3039(unchanged.)S5304 V1080(The)S1276(-l)S1377(option)S1672(only)S1889(tries)S2102(the)S2264(\256rst)S2460(name)S2717(server)S3003(listed)S3260(for)S3417(the)S3580(domain)S3921(that)S(you)150 4112 A4302(have)S4532(requested.)S5008(If)S5116(this)S5424 V1080(server)S1354(is)S1448(dead,)S(you)150 1689 A1865(may)S2064(need)S2280(to)S2384(specify)S2701(a)S2772(server)S3045(manually.)S3470(E.g.)S3658(to)S3762(get)S3911(a)S3982(listing)S4259(of)S4369(foo.edu,)S(you)150 4724 A4900(could)S5149(try)S5544 V1080("host)S1319(-t)S1412(ns)S1532(foo.edu")S1908(to)S2017(get)S2171(a)S2247(list)S2401(of)S2516(all)S2648(the)S2802(name)S3051(servers)S3368(for)S3517(foo.edu,)S3877(and)S4053(then)S4257(try)S4400("host)S4640(-l)S4734(foo.edu)S(xxx")191 5070 A5664 V1080(for)S1223(all)S(xxx)150 1349 A1524(on)S1649(the)S1797(list)S1945(of)S2054(name)S2297(servers,)S(until)184 2633 A(you)150 2842 A3017(\256nd)S3198(one)S3368(that)S3544(works.)S7903 V720(September)S1176(13,)S(1996)200 1326 A4990(Page)S5211(2)S8143 VEP%%Trailer%%DocumentFonts: Times-Roman Times-Italic%%Pages: 2⌨️ 快捷键说明
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