top-like interface for container metrics.
DNS lookup utility.
Show TXT records of the domain pepecos.es:
dig txt pepecos.esConsider use in combination with watch command to monitor a recently change:
watch dig txt pepecos.esTo force dig using a specific DNS server from which do the query use @<DNS_SERVER_HOSTNAME>. Using Cloudflare's 1.1.1.1 as DNS server:
dig @1.1.1.1 a pepecos.estop-like I/O monitor. It displays columns for the I/O bandwidth read and written by each process/thread.
top-like network monitor. It listens to network traffic on a named interface, or on the first interface it can find which looks like an external interface if none is specified, and displays a table of current bandwidth usage by pairs of hosts.
List open files by processes.
Reads and writes data across network connections, using the TCP or UDP protocol. It can open TCP connections, send UDP packets, listen on arbitrary TCP and UDP ports, do port scanning, and deal with both IPv4 and IPv6.
Check if there is connectivity with a database host:
$ nc -zv my-db-hostnamen.tld 3306
Connection to my-db-hostnamen.tld 3306 port [tcp/mysql] succeeded!