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I have four users in my red hat linux 9. I want that all these four users should add in a group i.e "Marketing".please guide me that using terminal which command may i write so that the users should added in the group.
Note:- I does't want to use GUI interface to do it.
Nothing like allowing the OP to answer his/her own question, eh? Your answer isn't quite right either.
from the man page:
In addition, three variant programs egrep, fgrep and rgrep are available. egrep is the same as grep -E. fgrep is the same as
grep -F. rgrep is the same as grep -r. Direct invocation as either egrep or fgrep is deprecated, but is provided to allow
historical applications that rely on them to run unmodified.
Interpret PATTERN as an extended regular expression (ERE, see below). (-E is specified by POSIX.)