1dnsget(1) General Commands Manual dnsget(1)
3
7 dnsget - DNS lookup utility
8
11 dnsget [-v|-q] [-c class] [-t type] [-o option:value] name...
12
15 dnsget is a simple command-line to perform DNS lookups, similar to
16 host(1) and dig(1). It is useable for both interactive/debugging sce‐
17 narious and in scripts. The program is implemented using udns(3)
18 library.
19 By default, dnsget produces a human-readable output, similar to
22 alias.example.com. CNAME www.example.com.
23 www.example.com. A 192.168.1.1
24 www.example.com. MX 10 mx.example.com.
25 which is just sufficient to see how a given name resolves. Output for‐
26 mat is controllable with -v and -q options -- the former increases ver‐
27 bosity level up to printing the whole DNS contents of all packets sent
28 and received, which is suitable for debugging DNS problems, while the
29 latter reduces the level, making output more quiet, up to bare result
30 with no error messages, which is good for scripts.
31
34 The following options are recognized by dnsget:
35 -v produce more detailed output. More -v's means more details will
38 be produced. With single -v,dnsget will print contents of all
39 received DNS packets (in a readable format), while with -vv, it
40 will output all outgoing DNS packets too.
41 -q the opposite for -v -- produce less detailed output. With sin‐
44 gle -q,dnsget will only show (decoded) data from final DNS
45 resource records (RR), while -qq also suppresses error messages.
46 -t type
49 request record(s) of the given type type. By default, dnsget
50 will ask for IPv4 address (A) record, or for PTR record if the
51 argument in question is an IPv4 or IPv6 address. Recognized
52 types include A, AAAA, MX, TXT, CNAME, PTR, NS, SOA, ANY and
53 others.
54 -c class
57 request DNS record(s) of the given class class. By default dns‐
58 get uses IN class. Valid classes include IN, CH, HS, ANY.
59 -a (compatibility option). Equivalent to setting query type to ANY
62 and increasing verbosity level (-v).
63 -C (planned)
66 -x (planned)
69 -o option:value
72 Set resolver option option to the value value (may be specified
73 several times). The same as setting $RES_OPTIONS environment
74 variable. The following options are recognized:
75 timeout:sec
77 Set initial query timeout to sec.
78 attempts:num
80 (re)try every query num times before failing.
81 udpbuf:bytes
83 set DNS UDP buffer size to bytes bytes. Valid values are
84 from 512 to 65535. If bytes is greather than 512, EDNS0
85 (RFC 2671) extensions will be used.
86 port:num
88 Use given UDP port number num instead of the default port
89 53 (domain).
90 -n nameserver
93 Use the given nameserver(s) (may be specified more than once)
94 instead of the default. Using this option has the same same
95 effect as $NSCACHEIP or $NAMESERVERS environment variables, with
96 the only difference that only IPv4 addresses are recognized for
97 now, and it is possible to specify names (which will be resolved
98 using default settings) instead of IP addresses.
99 -h print short help and exit.
102
105 When all names where resovled successefully, dnsget exits with zero
106 exit status. If at least one name was not found, dnsget will exit with
107 return code 100. If some other error occured during name resolution,
108 it will exit with code 99. In case of usage or initialization error,
109 dnsget will return 1.
110
113 host(1) dig(1) resolv.conf(5) udns(3).
114User Utilities Apr 2005 dnsget(1)