bash 通过 ssh 运行程序失败，并显示“打开终端时出错：未知”。
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/30469813/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
running a program through ssh fails with "Error opening terminal: unknown."
提问by Yuval Atzmon
When I try to execute a simple command through ssh, then it is successful. e.g.
当我尝试通过 ssh 执行一个简单的命令时，它就成功了。例如
#] ssh servername "echo abcd"
abcd
#]
However, when I try the following command, it fails:
但是，当我尝试以下命令时，它失败了：
#] ssh servername ~/htopmem.sh
Error opening terminal: unknown.
#]
where the content of htopmem.sh is below. (inspired by the answer of Marwan Alsabbagh on htop output to human readable file)
htopmem.sh 的内容在下面。（灵感来自 Marwan Alsabbagh 对htop 输出到人类可读文件的回答）
#!/bin/bash
echo q | htop | sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]//g" | ~/aha --black --line-fix | grep Mem | grep -E -o "[0-9]+/[0-9]+"
If I manually ssh to the server and run htopmem, then the execution is successful:
如果我手动ssh到服务器并运行htopmem，则执行成功：
#] ./htopmem.sh
6515/24021
#]
any idea on how to make the "ssh servername ~/htopmem.sh" command work?
关于如何使“ssh servername ~/htopmem.sh”命令起作用的任何想法？
Thank you!
谢谢！
回答by Thomas Dickey
A plain sshcommand like that does not have a tty(terminal). Use the -toption to force sshto open the terminal on its way in.
ssh像这样的普通命令没有tty（终端）。使用-t选项强制ssh打开终端。
From the manual:
从手册：
-tForce pseudo-tty allocation. This can be used to execute arbitrary screen-based programs on a remote machine, which can be very useful, e.g., when implementing menu services. Multiple
-toptions force tty allocation, even if ssh has no local tty.
-t强制伪 tty 分配。这可用于在远程机器上执行任意基于屏幕的程序，这非常有用，例如在实现菜单服务时。多个
-t选项强制 tty 分配，即使 ssh 没有本地 tty。
So this would work (better):
所以这会起作用（更好）：
ssh -t servername ~/htopmem.sh
