tty (Unix)

<h2 id="usage">Usage</h2>
<p>The tty command is commonly used to check if the output medium is a terminal. The command prints the file name of the terminal connected to standard input. If no file is detected (in case, it's being run as part of a script or the command is being <a href="/facts/Pipeline_(Unix)/EIhovuT2">piped</a>) "not a tty" is printed to stdout and the command exits with an exit status of 1. The command also can be run in silent mode (tty -s) where no output is produced, and the command exits with an appropriate exit status.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a>
</p>
<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Pseudoterminal/CV9rjfhz">Pseudoterminal</a></li>
<li><a href="/facts/Teleprinter/pn5SQKTf">Teleprinter</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="https://pubs.opengroup.org/onlinepubs/9799919799/utilities/tty.html">tty</a> – Shell and Utilities Reference, <a href="/facts/Single_Unix_Specification/w1ba5bDt">The Single UNIX Specification</a>, Version 4 from <a href="/facts/The_Open_Group/uRoDdEae">The Open Group</a></li>
<li><a href="https://www.freebsd.org/cgi/man.cgi?query=tty&sektion=1">tty(1)</a> – <a href="/facts/FreeBSD/RKsFTm7F">FreeBSD</a> General Commands <a href="/facts/Man_page/S2yYjy0J">Manual</a></li>
<li><a href="https://man.netbsd.org/tty.1">tty(1)</a> – <a href="/facts/NetBSD/PTm5HWls">NetBSD</a> General Commands <a href="/facts/Man_page/S2yYjy0J">Manual</a></li>
<li><a href="https://man.openbsd.org/tty.1">tty(1)</a> – <a href="/facts/OpenBSD/xmPS9tek">OpenBSD</a> General Commands <a href="/facts/Man_page/S2yYjy0J">Manual</a></li>
<li><a href="https://docs.oracle.com/cd/E88353_01/html/E37839/tty-1.html">tty(1)</a> – <a href="/facts/Solaris_(operating_system)/KPfT98EJ">Solaris 11.4</a> User Commands Reference <a href="/facts/Man_page/S2yYjy0J">Manual</a></li>
<li><a href="https://linux.die.net/man/1/tty">tty(1)</a> – <a href="/facts/Linux/9FvCKSTq">Linux</a> User Commands <a href="/facts/Man_page/S2yYjy0J">Manual</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"tty". pubs.opengroup.org. Retrieved 2020-02-14. <a href="https://pubs.opengroup.org/onlinepubs/9699919799/utilities/tty.html" target="_blank">https://pubs.opengroup.org/onlinepubs/9699919799/utilities/tty.html</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>"tty". man7.org. <a href="https://man7.org/linux/man-pages/man1/tty.1.html" target="_blank">https://man7.org/linux/man-pages/man1/tty.1.html</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>"What does "TTY" stand for?". Ask Ubuntu. Retrieved 2020-02-14. <a href="https://askubuntu.com/questions/481906/what-does-tty-stand-for" target="_blank">https://askubuntu.com/questions/481906/what-does-tty-stand-for</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
<li id="fn:4"><p>"tty(1) - Linux man page". linux.die.net. Retrieved 2020-02-14. <a href="https://linux.die.net/man/1/tty" target="_blank">https://linux.die.net/man/1/tty</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li>
</ol>

tty (Unix) open-in-new

tty (Unix)