Nslookup linux debian 10

DESCRIPTION¶

nslookup is a program to query Internet domain name servers. nslookup has two modes: interactive and non-interactive. Interactive mode allows the user to query name servers for information about various hosts and domains or to print a list of hosts in a domain. Non-interactive mode prints just the name and requested information for a host or domain.

ARGUMENTS¶

Interactive mode is entered in the following cases:

a. when no arguments are given (the default name server is used); b. when the first argument is a hyphen (-) and the second argument is the host name or Internet address of a name server.

Non-interactive mode is used when the name or Internet address of the host to be looked up is given as the first argument. The optional second argument specifies the host name or address of a name server.

Options can also be specified on the command line if they precede the arguments and are prefixed with a hyphen. For example, to change the default query type to host information, with an initial timeout of 10 seconds, type:

nslookup -query=hinfo -timeout=10

The -version option causes nslookup to print the version number and immediately exit.

INTERACTIVE COMMANDS¶

host [server] This command looks up information for host using the current default server or using server, if specified. If host is an Internet address and the query type is A or PTR, the name of the host is returned. If host is a name and does not have a trailing period (.), the search list is used to qualify the name.

To look up a host not in the current domain, append a period to the name.

server domain | lserver domain These commands change the default server to domain; lserver uses the initial server to look up information about domain, while server uses the current default server. If an authoritative answer cannot be found, the names of servers that might have the answer are returned. root This command is not implemented. finger This command is not implemented. ls This command is not implemented. view This command is not implemented. help This command is not implemented. ? This command is not implemented. exit This command exits the program. set keyword[=value] This command is used to change state information that affects the lookups. Valid keywords are:

all This keyword prints the current values of the frequently used options to set. Information about the current default server and host is also printed. class=value This keyword changes the query class to one of:

The class specifies the protocol group of the information. The default is IN; the abbreviation for this keyword is cl.

nodebug This keyword turns on or off the display of the full response packet, and any intermediate response packets, when searching. The default for this keyword is nodebug; the abbreviation for this keyword is [no]deb. nod2 This keyword turns debugging mode on or off. This displays more about what nslookup is doing. The default is nod2. domain=name This keyword sets the search list to name. nosearch If the lookup request contains at least one period, but does not end with a trailing period, this keyword appends the domain names in the domain search list to the request until an answer is received. The default is search. port=value This keyword changes the default TCP/UDP name server port to value from its default, port 53. The abbreviation for this keyword is po. querytype=value | type=value This keyword changes the type of the information query to value. The defaults are A and then AAAA; the abbreviations for these keywords are q and ty.

Please note that it is only possible to specify one query type. Only the default behavior looks up both when an alternative is not specified.

norecurse This keyword tells the name server to query other servers if it does not have the information. The default is recurse; the abbreviation for this keyword is [no]rec. ndots=number This keyword sets the number of dots (label separators) in a domain that disables searching. Absolute names always stop searching. retry=number This keyword sets the number of retries to number. timeout=number This keyword changes the initial timeout interval to wait for a reply to number, in seconds. novc This keyword indicates that a virtual circuit should always be used when sending requests to the server. novc is the default. nofail This keyword tries the next nameserver if a nameserver responds with SERVFAIL or a referral (nofail), or terminates the query (fail) on such a response. The default is nofail.

RETURN VALUES¶

nslookup returns with an exit status of 1 if any query failed, and 0 otherwise.

IDN SUPPORT¶

If nslookup has been built with IDN (internationalized domain name) support, it can accept and display non-ASCII domain names. nslookup appropriately converts character encoding of a domain name before sending a request to a DNS server or displaying a reply from the server. To turn off IDN support, define the IDN_DISABLE environment variable. IDN support is disabled if the variable is set when nslookup runs, or when the standard output is not a tty.

FILES¶

Источник

Как установить и использовать команды dig и nslookup в Linux

В этой статье вы узнаете, как установить средство устранения неполадок сети и сбора информации о доменных именах.

Dig, сокращение от Domain Information Gopher, представляет собой утилиту поиска DNS, используемую для проверки DNS-серверов и устранения неполадок, связанных с DNS-серверами. Из-за простоты использования системные администраторы полагаются на этот инструмент для устранения проблем с DNS.

Nslookup используется для обработки запросов DNS и отображает важную информацию, такую как записи MX и IP-адрес, связанный с доменным именем.

В новой системе Linux по умолчанию поставляются утилиты dig и nslookup. Однако старые системы Linux могут не работать. Они входят в состав пакета bind-utils.

Давайте посмотрим, как мы можем установить утилиты устранения неполадок DNS в Linux.

На этой странице:

1. Установка dig и nslookup в CentOS/RHEL
2. Установка dig и nslookup в Debian/Ubuntu
3. Установка dig и nslookup в ArchLinux
4. Использование команды dig
5. Использование команды nslookup

Установка dig и nslookup в CentOS/RHEL

В Red Hat Linux/CentOS установите dig и nslookup с помощью команды dnf.

После успешной установки проверьте версию с помощью приведенной ниже команды.

Установка dig&nslookup на Debian/Ubuntu

В Debian и любых его производных, включая Debian, установка выполняется с помощью команды apt.

Опять же, чтобы проверить установку, запустите команду.

Установка dig&nslookup в ArchLinux

Для ArchLinux будет использоваться команда для установки dig и nslookup.

Чтобы проверить установленную версию dig, запустите.

Использование команды копать

Команду dig можно использовать для запроса доменного имени и получения информации, как показано ниже:

Команда отображает множество информации, такой как версия командной утилиты dig, DNS-сервер и соответствующий ему IP-адрес.

Пример вывода

; > DiG 9.11.3-1ubuntu1.9-Ubuntu > fossmint.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER
Чтобы получить более конкретную информацию и отобразить только IP-адрес доменного имени, добавьте аргумент +short, как показано ниже:
# dig fossmint.com +short 104.17.179.254 104.17.171.254
 
Чтобы проверить запись MX доменного имени, запустите.
 
# dig fossmint.com MX +short 50 mx3.zoho.com. 20 mx2.zoho.com. 10 mx.zoho.com.
 
Использование команды nslookup
 
Чтобы получить информацию о доменном имени с помощью утилиты nslookup, используйте следующую команду.
 
Пример вывода
 
Server: 127.0.0.53 Address: 127.0.0.53#53 Non-authoritative answer: Name: fossmint.com Address: 104.27.179.254 Name: fossmint.com Address: 104.27.171.254 Name: fossmint.com Address: 2606:4700:30::681b:b0fe Name: fossmint.com Address: 2606:4700:30::681b:b1fe
 
Заключение
 
В этой статье вы узнали, как установить командные утилиты dig и nslookup в различных дистрибутивах Linux, а также основное использование этих команд. Мы надеемся, что теперь вы сможете без труда установить утилиты, если столкнетесь с системой без них.
 
Источник
 
[Fix] Nslookup Command Not Found (100% Working)
 
If your dnsutils & nslookup packages are missing from your system you may encounter the error message ‘nslookup: command not found. Install the packages using install commands according to your operating system.
 
 
Nslookup Command Not Found
 
Nslookup-Name Server Lookup, a network administration tool is widely used as a useful command to get information from the DNS server. Served as a network administration tool for querying the Domain Name System (DNS). It obtains domain name or IP address mapping or any other specific DNS record. Nslookup Command also comes in handy while troubleshooting DNS-related problems.
 
You may need to use nslookup command on a Debian server (Debian, also known as Debian GNU/Linux), and encounter a problem “nslookup: command not found”. Use apt-get to install dnsutils to solve the issue.
 
If it works, the output will look like this
 
Install nslookup in CentOS
 
Older Linux systems may not have nslookup utilities by default. Newer versions, however, have the function installed by default. If you don’t have Nslookup by default The two come bundled inside the bind-utils package.
 
Run the following command to install the nslookup in CentOS. The processing tab will look like this:
 
Install nslookup on Debian / Ubuntu
 
For Debian and similar derivatives including Debian, install using the apt command.
 
Install nslookup on ArchLinux
 
To check the version installed, the command is the same for Debian/Ubuntu
 
To Conclude
 
For missing packages on different Linux distributions use the mentioned commands to install and resolve the error. If the issue persists, contact the technical support of your operating system for further assistance.
 
About The Author
 
David Wilson
 
Article Writer (Solutions and Product Review) Food lover. Thinker. Solutionist. All of your tech, hardware, software, and device problems come to an end because of him. He equips himself with troubleshooting, and reviewing and then writes them up. Loves his grill more than anything.
 
Источник