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There are several tasks that should be performed prior to installing PMDF for the first time. These tasks are outlined in the sections below.
1.2.1 Create PMDF and PMDFUSER Accounts
You must add two user accounts for PMDF to the system password file and specify (but not create) the accounts' home directories. Specify pmdf
as the first username with /pmdf/queue
as its home directory, and specify pmdfuser
as the second username, also with /pmdf/queue
as its home directory. Be sure that the user ids and group ids for the pmdf
and pmdfuser
accounts are distinct from each other and from those of any other
accounts on your system.
To add these accounts, you may use the groupadd
and useradd
utilities, making sure to specify but not create the home directories, as described in Section 1.2.1.1 below, or you may use the /usr/sbin/vipw
utility to manually edit the system password file, /etc/passwd
, and add the accounts, and then edit the system shadow file, /etc/shadow
, similarly, as described in Section 1.2.1.2 below. Or you may use any
other utility provided by your Linux distribution to create accounts.
Make sure to specify that the home directory of the pmdf
and pmdfuser
accounts (/pmdf/queue
) should not be created.
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1.2.1.1 Using GROUPADD and USERADD to Add the Accounts
This section describes how to use the groupadd
and useradd
utilities to add the required pmdf
and pmdfuser
accounts.
Issue the commands
# groupadd pmdf # useradd -c "PMDF" -d /pmdf/queue -M -s /bin/sh -f 0 -e "" -g pmdf pmdf # groupadd pmdfuser # useradd -c "PMDF user" -d /pmdf/queue -M -s /bin/sh -f 0 -e "" -g pmdfuser pmdfuser |
passwd
command to set real passwords for the two new accounts.
1.2.1.2 Editing the /etc/passwd and /etc/shadow Files to Add the Accounts
This section describes how to use the /usr/sbin/vipw
utility to manually edit the system password file, and add the required pmdf
and pmdfuser
accounts. Specify /pmdf/queue
as the home directory for both accounts. Be sure that the user ids and group ids of the pmdf
and pmdfuser
accounts are distinct from each other and from those of any other
accounts on your system.
Invoke vipw
to manually edit the system password file. Upon saving the system password file, you will be prompted to also update the system shadow file, /etc/shadow
, with entries for these accounts. (Note that in order to make system administration more manageable, it is usually recommended that shadow entries be added in exactly the same order as password entries.) Create entries for the pmdf
and pmdfuser
accounts in the system shadow file having arbitrary random strings in place of real passwords, save the system shadow file, and then use the passwd
command to set real passwords for the two new accounts.
For example, if your system has no accounts with user id or group id 30
or 31
, then an example of appropriate entries to add to /etc/passwd
is:
pmdf:x:30:30:PMDF:/pmdf/queue:/bin/sh pmdfuser:x:31:31:PMDF user:/pmdf/queue:/bin/sh |
An example of appropriate initial entries for the system shadow file is:
pmdf:xxxxxxxxxxxxx::::::: pmdfuser:yyyyyyyyyyyyy::::::: |
passwd
command to set real passwords for the two new accounts.
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