A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
-bash/zsh: tcping command not found #Fedora dnf install tcping #OS X brew install tcping #Cent OS yum install tcping
tcping / tcping.exe 是一个控制台应用程序，其操作类似于“ping”，但它通过 tcp 端口工作。测量系统到 [SYN]、接收目标的 [SYN][ACK] 和发送 [ACK] 的时间。
注意：不包括最后一个 ACK 的时间，仅包括从发送端连接到线路所需的时间，即 tcping 测量在它自己和远程主机之间执行 TCP 3 次握手（SYN、SYN/ACK、ACK）所需的时间。这允许 (SYN, SYN/ACK) 的行程时间近似于 ICMP（请求，响应）等效项的行程时间。
tcping [-tdsvf46] [-i interval] [-n times] [-w interval] [-b n] [-r times][-j depth] [--tee filename] [-f] destination [port]
OPTIONS
-4 Prefer using IPv4
-6 Prefer using IPv6
-t ping continuously until stopped via control-c
-n count
send _count_ pings and then stop. Default 4.
-i interval
Wait _interval_ seconds between pings. Default 1. Decimals permitted.
-w interval
Wait _interval_ seconds for a response. Default 2. Decimals permitted.
-d include date and time on every output line
-f Force sending at least one byte in addition to making the connection.
-g count
Give up after _count_ failed pings.
-b type
Enable audible beeps.
'-b 1' will beep "on down". If a host was up, but now its not, beep.
'-b 2' will beep "on up". If a host was down, but now its up, beep.
'-b 3' will beep "on change". If a host was one way, but now its the other, beep.
'-b 4' will beep "always".
-c only show output on a changed state
-r count
Every _count_ pings, we will perform a new DNS lookup for the host in case it changed.
-s Exit immediately upon a success.
-v Print version and exit.
-j Calculate jitter. Jitter is defined as the difference between the last response time and the historical average.
-js depth
Calculate jitter, as with -j but with an optional _depth_ argument specified. If _depth_ is specified tcping will
use the prior _depth_ values to calculate a rolling average.
--tee _filename_
Duplicate output to the _filename_ specified. Windows can still not be depended upon to have a useful command line
environment. Don't tease me, *nix guys.
--append
When using --tee, append to rather than overwrite the output file.
--file
Treat the "destination" option as a filename. That file becomes a source of destinations, looped through on a
line by line basis. Some options don't work in this mode and statistics will not be kept.
destination
A DNS name, an IP address, or (in "http" mode) a URL.
Do not specify the protocol ("http://") in "http" mode. Also do not specify server port via ":port" syntax.
For instance: "tcping http://www.elifulkerson.com:8080/index.html" would fail
Use the style: "tcping www.elifulkerson.com/index.html 8080" instead.
port
A numeric TCP port, 1-65535. If not specified, defaults to 80.
--header
include a header with the command line arguments and timestamp. Header is implied if using --tee.
HTTP MODE OPTIONS
-h Use "http" mode. In http mode we will attempt to GET the specified document and return additional values including
the document's size, http response code, kbit/s.
-u In "http" mode, include the target URL on each output line.
--post Use POST instead of GET in http mode.
--head Use HEAD instead of GET in http mode.
--get Shorthand to invoke "http" mode for consistency's sake.
--proxy-server _proxyserver_
Connect to _proxyserver_ to request the url rather than the server indicated in the url itself.
--proxy-port _port_
Specify the numeric TCP port of the proxy server. Defaults to 3128.
--proxy-credentials username:password
Specify a username:password pair which is sent as a 'Proxy-Authorization: Basic' header.
RETURN VALUE
tcping returns 0 if all pings are successful, 1 if zero pings are successful and 2 for mixed outcome.
tcping 测试 IP 及 6379 端口：
$ tcping -d 127.0.0.1 6379
Probing 127.0.0.1:6379/tcp - Port is open - time=1.632ms
Probing 127.0.0.1:6379/tcp - Port is open - time=0.239ms
Probing 127.0.0.1:6379/tcp - Port is open - time=0.266ms
Probing 127.0.0.1:6379/tcp - Port is open - time=0.842ms
Ping statistics for 127.0.0.1:6379
4 probes sent.
4 successful, 0 failed. (0.00% fail)
Approximate trip times in milli-seconds:
Minimum = 0.239ms, Maximum = 1.632ms, Average = 0.745ms
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如果关闭显示为：
$ tcping 127.0.0.1 6379
127.0.0.1 port 6379 closed.