Linux in a Nutshell, Fifth Edition

makemap | 281

Linux

Commands

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-c Send a YPPROC_CLEAR signal to ypserv, causing it to clear

all cached entries.

-i file_name

Create a YP_INPUT_NAME key with the value file_name.

-l Convert keys of the given map to lowercase.

-m master_name

Specify the value of the YP_M*ER_NAME key. The default

value is the current hostname.

--no-limit-check

Don’t enforce NIS size limits for keys or data.

-o file_name

Create a YP_OUTPUT_NAME key with the value file_name.

-r Treat lines beginning with # as comments. Do not include

them in the datafile.

-s Add the key YP_SECURE, indicating that ypserv should

accept connections to the database only from secure NIS

networks.

-u filename

Undo a gdbm file: print out a dbm file, one entry per line,

with a single space separating keys from values.

Example

It’s easy to write shell scripts to convert standard files such as /etc/

passwd to the key-value form used by makedbm. For example, the

awk program:

BEGIN { FS =":";OFS = "\t";}

{ print $1, $0}

takes the /etc/passwd file and converts it to a form that can be read

by makedbm to make the NIS file passwd.byname. That is, the key

is a username and the value is the remaining line in the /etc/passwd

file.

makemap

makemap [options] type name

System administration command. Create database maps for use by

sendmail in keyed map lookups.