问题
I faced a strange behavior of a grep command on Solaris 9. For example , I have a host file with two lines:
1.1.1.1 host
1.2.3.4 host-MY
I'd like to grep the line contains host string only (not the other line that contain host-MY)
I use: grep -Fxq host /etc/hosts
but I receive
grep: illegal option -- F
grep: illegal option -- q
grep: illegal option -- x
in spite of the fact that this options I can find in grep manual on my Solaris machine
回答1:
You're probably not calling the good grep executable.
Run which grep to know which one you are running.
On my Solaris box, the official grep is in:
> which grep
/usr/xpg4/bin/grep
The man page on my Solaris box refers to both /usr/bin/grep and /usr/xpg4/bin/grep. Only the latest supports these options.
来源：https://stackoverflow.com/questions/5245973/grep-command-on-solaris-9