Home/ Questions/Resolved the problem of the pseudo-terminal will not be allocated because stdin is not a terminal
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Reese Rodriguez
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Asked: 2022-05-12T07:51:40+00:00 In:

Resolved the problem of the pseudo-terminal will not be allocated because stdin is not a terminal

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As the title says, I am getting the “pseudo-terminal will not be allocated because stdin is not a terminal.” error. How can I fix it so the error goes away? Here is my detail:

j@ubuntu:~/tmp/1030$
j@ubuntu:~/tmp/1030$ ssh -T 192.168.171.161 <<EOF
> uptime
> date
> EOF
Pseudo-terminal will not be allocated because stdin is not a terminal.
Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 5.11.0-37-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage


301 updates can be installed immediately.
0 of these updates are security updates.
To see these additional updates run: apt list --upgradable

Your Hardware Enablement Stack (HWE) is supported until April 2025.
*** System restart required ***
 01:32:23 up 23:05,  1 user,  load average: 0.00, 0.00, 0.00
Sun 31 Oct 2021 01:32:23 AM PDT
j@ubuntu:~/tmp/1030$

When I operated it and I received the error text:

Pseudo-terminal will not be allocated because stdin is not a terminal.

I appreciate any help from you.

bash
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2 Answers

  1. Best Answer
    Expert

    The cause: No command is specified for ssh while stdin is redirected from a here document or pip.

    Solution: Use ssh option -q

    j@ubuntu:~/tmp/1030$ cat 1.sh | ssh -q 192.168.171.161 
Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 5.11.0-37-generic x86_64)
 
* Documentation: https://help.ubuntu.com 
* Management: https://landscape.canonical.com 
* Support: https://ubuntu.com/advantage 

301 updates can be installed immediately. 
0 of these updates are security updates. 
To see these additional updates run: apt list --upgradable 
Your Hardware Enablement Stack (HWE) is supported until April 2025. 
*** System restart required *** 
03:25:23 up 1 day, 58 min, 1 user, load average: 0.17, 0.07, 0.02 
ubuntu1029

    Where option -q means:

    -q Quiet mode. Causes most warning and diagnostic messages to be suppressed.
    • 16

  2. Also available with option -T manual

    Disable pseudo-tty allocation

    • 15

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