Sun Microsystems Sun Workstation 100U System Manager's Manual page 100

Sun 100/150 Installation Manual
Ibin/mail
lusr/ucb/mail
lusr/Hb/sendmail
lusr/lib/sendmail.cf
I usr I lib I sendm ail.domain.cf
lusr/lib/sendmail.generic.cf
I
usr
I
spool/ mail
I usr I spool I mqueue
I usr I spool I secretm ail
lusr/bin/xsend
lusr/bin/xget
lusr/lib/aliases
I usr I uc b I new aliases
I
usr
I
uc b Ibiff
I
usr / etc lin.comsat
lusr/etc/in.syslog
System Set-Up and Operation
old standard mail program (from V7)
UCB mail program, described in mail(l)
mail routing program
configuration file for mail routing
configuration file for "main machines" (see below)
configuration file for "subsidiary machines" (see below)
mail spooling directory
spool directory for mail going out over the network
secure mail directory
secure mail sender
secure mail receiver
mail forwarding information
command to rebuild binary forwarding database
mail notification enabler
mail notification daemon
error message logger, used by .endmail
Special note ror file server configurations:
On file servers and diskless clients the directory
I
u.r /lib resides on the shared, public disk.
Since this disk is read-only and is shared by all the systems, files that need to be writable or
need to be different on each machine cannot reside here. Instead there is a directory called
/ private that contains the file! that would normally reside in I u.r I lib. The .etup program
replaces the files in / u.r/lib by symbolic links to the files in / private so the files can still be
referenced by their normal name!. The files (and directories) so affected are listed below:
lusr/lib/sendmail.cf
/usr/lib/aliases
I
usr /lib
I
aliases.dir
/usr/lib/aliases.pag
I
usrllib/crontab
/usr/lib/uucp
/usr/lib/news
When the following instructions tell you to copy or edit one of the above files, instead use the
corresponding file in / private.
Mail is normally sent and received using the mail{l) command, which provides a front-end to
edit the messages sent and received, and passes the messages to .endmail(8) for routing. The
routing algorithm uses knowledge of the network name syntax, aliasing and forwarding informa-
tion, and network topology, as defined in the configuration file I u.rl libl .endmail.c/, to process
each piece of mail. Local mail is delivered by giving it to the program Ibin/mail which adds it
to themailboxesinthedirectory/u.r/.pool/mail, using a locking protocol to avoid problems
with simultaneous updates. After the mail is delivered, the local mail delivery daemon
I u.rl etclin.com.at notices, and it notifies users who have issued a "biff y" command that mail
has arrived.
Mail for u.ername is normally accessible in the file lu,r/'poollmail/u,ername. In the distribu-
tion system, your mail file is readable only by you; however, anyone with the super-user pass-
word can read others' files
7
including their mail. To send mail which is secure against any possi-
ble perusal (except by a code-breaker), use the secret mail facility, which encrypts the mail so
Revision
H
of
12
March
1984
6-7