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Full Discussion: Lines with comma
Top Forums Shell Programming and Scripting Lines with comma Post 303043558 by MadeInGermany on Friday 31st of January 2020 12:01:15 PM
Old 01-31-2020
Quote:
Originally Posted by zouhair
Code:
grep ^, a.txt

^ beginning of the line
, a comma
So it prints all lines that start with a , i.e. if the 1st field is empty.
Perhaps you want to only print if all fields are empty?
BTW it is better to put the RegularExpression string in quotes, in order to avoid unwanted substitiutions from the shell : '^,'
 

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ODIDX(1)						      Quick Database Manager							  ODIDX(1)

NAME
odidx - indexer of document files SYNOPSIS
odidx register [-l file] [-wmax num] [-tsuf sufs] [-hsuf sufs] name[dir] odidx relate name odidx purge name DESCRIPTION
This manual page documents briefly the odidx commands. The command odidx is a utility for indexing files on the local file system. This command is useful for a full-text search system of a Web site. Supported file format are plain text and HTML. Supported character encoding are US-ASCII and ISO-8859-1. The URI of each document is specified with the path of its file. Attributes named as title and date are given to each documents. When a document is already existing in the database, it is registered if its last modification time is newer, or it is ignored. Modification times are stored in the sub database `_mtime' in the main database directory. Score information are stored in the sub database `_score' in the main database directory. This command is used in the above format. name specifies a database name. dir specifies a directory name. OPTIONS
A summary of options is included below. For a complete description, see the file:///usr/share/doc/qdbm-doc/spex.html#odeumcli. -l file read a file and get list of paths of files to register. If `-' is specified, the standard input is read. -wmax num specify the max number of words to be stored in the document database. -tsuf sufs specify suffixes of plain text files in comma separated format. The default is `-tsuf .txt,.text'. -hsuf sufs specify suffixes of HTML files in comma separated format. The default is `-hsuf .html,.htm'. EXAMPLES
For example, to register files which are under `/home/mikio' and whose suffix are `.txt', `.c', or `.h', perform the following command. odidx register -tsuf ".txt,.c,.h" -hsuf "" casket /home/mikio Thus, to retrieve documents which include `unix' and `posix' and show the top 8 terms, perform the following command. odmgr search -max 8 -h casket "unix posix" SEE ALSO
qdbm(3), odmgr(1), odeum(3), odopen(3). AUTHOR
QDBM was written by Mikio Hirabayashi <mikio@fallabs.com>. This manual page was written by Fumitoshi UKAI <ukai@debian.or.jp>, for the Debian project (but may be used by others). Man Page 2005-05-23 ODIDX(1)
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