/usr/share/doc/postfix/LINUX_README is in postfix-doc 2.9.6-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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BBeerrkkeelleeyy DDBB iissssuueess
If you can't compile Postfix because the file "db.h" isn't found, then you MUST
install the Berkeley DB development package (name: db???-devel-???) that
matches your system library. You can find out what is installed with the rpm
command. For example:
$ rrppmm --qqff //uussrr//lliibb//lliibbddbb..ssoo
db4-4.3.29-2
This means that you need to install db4-devel-4.3.29-2 (on some systems,
specify "rrppmm --qqff //lliibb//lliibbddbb..ssoo" instead).
DO NOT download some Berkeley DB version from the network. Every Postfix
program will dump core when it is built with a different Berkeley DB version
than the version that is used by the system library routines. See the DB_README
file for further information.
PPrrooccmmaaiill iissssuueess
On RedHat Linux 7.1 and later pprrooccmmaaiill no longer has permission to write the
mail spool directory. Workaround:
# chmod 1777 /var/spool/mail
SSyyssllooggdd ppeerrffoorrmmaannccee
LINUX ssyyssllooggdd uses synchronous writes by default. Because of this, ssyyssllooggdd can
actually use more system resources than Postfix. To avoid such badness, disable
synchronous mail logfile writes by editing /etc/syslog.conf and by prepending a
- to the logfile name:
/etc/syslog.conf:
mail.* -/var/log/mail.log
Send a "kkiillll --HHUUPP" to the ssyyssllooggdd to make the change effective.
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