Error in Linux Mesg: Ttyname Failed: Inappropriate Ioctl for Device Error
In this article, we will learn how to fix the error mesg: ttyname failed: Inappropriate ioctl for device in Linux . We will discuss some of the causes of this error and show you how to fix it.
Let's start with what causes this error in Linux systems.
mesg: ttyname failed: Inappropriate ioctl for device Reason
In Linux, this error is caused by the default Vagrant configuration config.ssh.shell interacting with the Vagrant SSH shell command which is bash -l.bash -l
This will prompt Vagrant's internal SSH shell communicator. In Linux, Vagrant runs commands as root, so it will source this /root/.profile path.
The /root/.profile path contains the mesg n command on Linux systems. This command ensures that no other user can write to your terminal device.
However, when we run commands on Vagrant, there is no terminal device. Therefore, mesg n is not compatible with it, resulting in an error.
We can fix this error in Linux using one of the following methods.
Modifying user profiles on Linux systems
We can fix this error by modifying the user configuration file on the Linux operating system. First, we need to open the configuration file using the following terminal command.
$ /root/.profile
After this, we need to replace mesg n || tty -s && mesg nwith true. This method will work because the command is only called if the terminal device exists mesg -n.
So when we run the command now, it will be run on a non-interactive login shell. Hence, any errors will be displayed by the system.
Avoid Login Shells Completely
Another solution to this error is to avoid using a login shell altogether. We change config.ssh.shell in the Vagrant settings to Bash without the -l flag.
By doing this, the system will not show errors on our Linux system.
We hope you found this article helpful in understanding how to fix the error message: ttyname failed: inappropriate ioctl for device in Linux.
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