Whats the difference between mail and mailx?
I'm trying to troubleshoot a problem where I can send mail from server A with this
`echo $MESSAGE | mail -s "$SUBJECT" -r $FROM $RECIPIENTS`
command but executing the same command from server B throws me this error (Both servers are RHEL)
mail: invalid option -- r
Usage: mail [-iInv] [-s subject] [-c cc-addr] [-b bcc-addr] to-addr ...
[-- sendmail-options ...]
mail [-iInNv] -f [name]
mail [-iInNv] [-u user]
Now... going through mail manpages to ty to understand whats happening, `man mail` gives me this:
In Server A
MAILX(1) User Commands MAILX(1)
NAME
mailx - send and receive Internet mail
SYNOPSIS
mailx [-BDdEFintv~] [-s subject] [-a attachment ] [-c cc-addr] [-b bcc-addr] [-r from-addr] [-h hops]
[-A account] [-S variable[=value]] to-addr . . .
mailx [-BDdeEHiInNRv~] [-T name] [-A account] [-S variable[=value]] -f [name]
mailx [-BDdeEinNRv~] [-A account] [-S variable[=value]] [-u user]
But in server B
MAIL(1) BSD General Commands Manual MAIL(1)
NAME
mail - send and receive mail
SYNOPSIS
mail [-iInv] [-s subject] [-c cc-addr] [-b bcc-addr] to-addr... [-- sendmail-options...]
mail [-iInNv] -f [name]
mail [-iInNv] [-u user]
Now... if I try `man mailx` in server B I get:
MAILX(P) POSIX Programmer�s Manual MAILX(P)
PROLOG
This manual page is part of the POSIX Programmer�s Manual. The Linux implementation of this interface may differ
(consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be imple-
mented on Linux.
NAME
mailx - process messages
SYNOPSIS
Send Mode
mailx [-s subject] address...
Receive Mode
mailx -e
mailx [-HiNn][-F][-u user]
mailx -f[-HiNn][-F][file]
Server B has a different version of mail than Server A? Mailx and Mail are different things? I would like to use the -r option I use in server A but in server B and I don't really know whats happening.