and wanted to pull the 'users' netgroups returned into a perl array, that will look like this
I would pretty happy with how to do it if everything in the string was a users_* split by a comma, but because I have the 'steven.*' with a space after it it falls over a bit,
does anyone know how I can only include the bits of the string that start with 'users_' into my array, excluding everything else? so effectively only buildng an array from the red bits below
All,
I have a field in a comma seperated file with hundreds of lines and about 20 columns and I wish to remove all numbers after the decimal point in field 4 on each line and output the rest to another file or write it back to itself.
File is like this
20070126, 123.0, GBP, 1234.5678,... (9 Replies)
Hi,
I need to split xml-files with sizes greater than 2 gb into smaler chunks. As I dont want to end up with billions of files, I want those splitted files to have configurable sizes like 250 MB. Each file should be well formed having an exact copy of the header (and footer as the closing of the... (0 Replies)
Let's say I have a very long string with no spaces but just words stored in $very_long_string.
$very_long_string = "aaaaaaaaaaabbbbbbbbbbbccccccccccccdddddddddddd";
I can do this to split the string into 1 character each and store them in an array:
@myArray = split(//, $very_long_string); ... (3 Replies)
How do I split a file into many parts but with different amounts of lines per part? I looked at the split command but that only splits evenly.
I'd like a range specified to determine how many lines each output file should have.
For example, if the input file has 1000 lines and the range is... (1 Reply)
How can i break a text file into parts that occur between a specific pattern?
I have text file having various xml many tags like which starts with the tag "<?xml version="1.0" encoding="utf-8"?>" . I have to break the whole file into several xmls by looking for the above pattern.
All the... (9 Replies)
How do you truncate specific parts of a string.
Example:
1 This is the string
Goal:
This is the string
As you can see I'm trying to simply remove the first two characters of the string the number one and the space between the one and the word "this."
Your help is appreciated.
... (8 Replies)
Hello. I need help with copying part of a file structure to another directory while still keeping the structure. For example look below:
../folder1/sub1/txt.txt
../folder1/sub2/pic.png
../folder2/sub1/pic.png
../folder2/sub2/txt.txt
So in this I would like to copy only the directories and... (3 Replies)
Hi all,
I desperately need a small script which deletes everything in a particular .txt file when "Abs = {" appears till "},", and also when "B-1 = {" appears till "},"
I would like all the text in between of those instances to be deleted, however, other text to be unedited (kept as it is).... (12 Replies)
I am trying to add a condition to the below perl that will capture the GTtag and place a specific string in the last field of each line. The problem is that the GT value used is not right after the tag rather it is a few fields away. The values should always be 0/1 or 1/2 and are in bold in the... (12 Replies)
Discussion started by: cmccabe
12 Replies
LEARN ABOUT OSX
revnetgroup
REVNETGROUP(8) BSD System Manager's Manual REVNETGROUP(8)NAME
revnetgroup -- generate reverse netgroup data
SYNOPSIS
revnetgroup -u | -h [-f netgroup_file]
DESCRIPTION
The revnetgroup utility processes the contents of a file in netgroup(5) format into what is called reverse netgroup form. That is, where the
original file shows netgroup memberships in terms of which members reside in a particular group, the reverse netgroup format specifies what
groups are associated with a particular member. This information is used to generate the netgroup.byuser and netgroup.byhosts NIS maps.
These reverse netgroup maps are used to help speed up netgroup lookups, particularly for the innetgr() library function.
For example, the standard /etc/netgroup file may list a netgroup and a list of its members. Here, the netgroup is considered the key and the
member names are the data. By contrast, the reverse netgroup.byusers database lists each unique member as the key and the netgroups to which
the members belong become the data. Separate databases are created to hold information pertaining to users and hosts; this allows netgroup
username lookups and netgroup hostname lookups to be performed using independent keyspaces.
By constructing these reverse netgroup databases (and the corresponding NIS maps) in advance, the getnetgrent(3) library functions are spared
from having to work out the dependencies themselves on the fly. This is important on networks with large numbers of users and hosts, since
it can take a considerable amount of time to process very large netgroup databases.
The revnetgroup utility prints its results on the standard output. It is usually called only by /var/yp/Makefile when rebuilding the NIS
netgroup maps.
OPTIONS
The revnetgroup utility supports the following options:
-u Generate netgroup.byuser output; only username information in the original netgroup file is processed.
-h Generate netgroup.byhost output; only hostname information in the original netgroup file is processed. (Note at least one of the -u
or -h flags must be specified.)
[-f netgroup_file]
The revnetgroup utility uses /etc/netgroup as its default input file. The -f flag allows the user to specify an alternate input
file. Specifying ``-'' as the input file causes revnetgroup to read from the standard input.
FILES
/var/yp/Makefile the Makefile that calls yp_mkdb and revnetgroup to build the NIS databases
/etc/netgroup the default netgroup database file. This file is most often found only on the NIS master server
SEE ALSO getnetgrent(3), netgroup(5), yp(8), yp_mkdb(8)AUTHORS
Bill Paul <wpaul@ctr.columbia.edu>
BSD October 24, 1995 BSD