Linux, FreeBSD, Juniper, Cisco / Network security articles and troubleshooting guides

Minimal installation of Debian Linux does not provide some tools for network troubleshooting like dig, tcpdump, lsof (although netstat can easily be used instead of lsof). Dig is part of [i]dnsutils[/i] package.

[b]To install dig under Debian:[/b]
[code]
user@host:~# dig
-bash: dig: command not found
user@host:~# apt-get install dnsutils
Reading package lists... Done
Building dependency tree
...

user@host:~# dig

; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>>
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36568
;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;. IN NS

;; ANSWER SECTION:
. 7075 IN NS l.root-servers.net.
. 7075 IN NS c.root-servers.net.
. 7075 IN NS f.root-servers.net.
. 7075 IN NS h.root-servers.net.
. 7075 IN NS e.root-servers.net.
. 7075 IN NS d.root-servers.net.
. 7075 IN NS j.root-servers.net.
. 7075 IN NS i.root-servers.net.
. 7075 IN NS m.root-servers.net.
. 7075 IN NS a.root-servers.net.
. 7075 IN NS g.root-servers.net.
. 7075 IN NS b.root-servers.net.
. 7075 IN NS k.root-servers.net.

;; Query time: 17 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Jan 13 11:10:14 2015
;; MSG SIZE rcvd: 228[/code]