fstat | grep internet | grep -v -e '>' -e '<'

[mfaridi]

When I type this command fstat | grep internet | grep -v -e '>' -e '<'

I see this error

grep: unknown option -- color
usage: grep [-abcEFGHhIiLlnoPqRSsUVvwxZ] [-A num] [-B num] [-C[num]]
[-e pattern] [-f file] [--binary-files=value] [--context[=num]]
[--line-buffered] [pattern] [file ...]
grep: unknown option -- color
usage: grep [-abcEFGHhIiLlnoPqRSsUVvwxZ] [-A num] [-B num] [-C[num]]
[-e pattern] [-f file] [--binary-files=value] [--context[=num]]
[--line-buffered] [pattern] [file ...]

[halber_mensch]

alias grep ?
my guess is you're using a .profile/.cshrc from a system that has an alias for grep (grep --color=auto)that expects gnu grep, but OpenBSD grep does not support the gnu --color argument.

[BSDfan666]

halber_mensch is correct, your environment seems to be appending a --color argument to grep.

BSD grep != GNU grep.

[mfaridi]

Thanks Guys,
I check my .zshrc and I modify it and right now everything is ok

[TerryP]

If you find yourself using different systems often, you might adjust your zshrc to change the aliases based on the OS.