Noun
stderr (uncountable)
(computing) Standard error: a stream to which error messages are sent, often the same stream as stdout.
They can always run stderr through uniq. Larry Wall
Launching NT processes from within bash is great, but in order to support NT command-line utilities there needs to be a way for NT binaries to access the file descriptors that represent stdin, stdout, and stderr inside a WSL process. Source: Internet
You can see that Goss is expecting an exit status of 1, which a message printed to stderr. Source: Internet
Name of log file to write stderr messages to. Source: Internet