Here are several different ways to test a TCP port without telnet.
BASH (man page)
$ cat < /dev/tcp/127.0.0.1/22
SSH-2.0-OpenSSH_5.3
^C
$ cat < /dev/tcp/127.0.0.1/23
Here are several different ways to test a TCP port without telnet.
$ cat < /dev/tcp/127.0.0.1/22
SSH-2.0-OpenSSH_5.3
^C
$ cat < /dev/tcp/127.0.0.1/23
| -- show running queries (pre 9.2) | |
| SELECT procpid, age(query_start, clock_timestamp()), usename, current_query | |
| FROM pg_stat_activity | |
| WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' | |
| ORDER BY query_start desc; | |
| -- show running queries (9.2) | |
| SELECT pid, age(query_start, clock_timestamp()), usename, query | |
| FROM pg_stat_activity | |
| WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' |
| #!/usr/bin/python | |
| # setup: pip install requests beautifulsoup4 | |
| from decimal import Decimal | |
| import requests | |
| from bs4 import BeautifulSoup | |
| import sys | |
| import getpass |
| /* webserver.c */ | |
| #include <cnaiapi.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <ctype.h> | |
| #include <stdbool.h> | |
| #include <sys/stat.h> | |
| #include <fcntl.h> |