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Top Forums UNIX for Dummies Questions & Answers Removing blank lines not working Post 302688529 by MaindotC on Sunday 19th of August 2012 02:19:04 PM
Old 08-19-2012
Removing blank lines not working

In my bash script I want to echo lines in a file and ensure no blank lines are echoed:
Code:
for i in $(cat txt)
do
echo $i | sed 's/|/ /g;s/ SEARCHTERM$//g;s/ /\r\n/g;s/^$/d'
done

Keep in mind this is a fragment so ignore the fact that the for loop is not closed. When I add the "s/^$/d' per several other examples I've found on these forums I receive an "unterminated s" error. How do I properly remove blank lines? I tried removing the s and breaking it into a separate sed statement but either it's not removing the blank lines or I get an unterminated s error. Sample input file is UNIX GID's from the /etc/group file, one per line.

Last edited by MaindotC; 08-19-2012 at 04:06 PM..
 

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ANACRONTAB(5)						       Anacron Users' Manual						     ANACRONTAB(5)

NAME
/etc/anacrontab - configuration file for anacron DESCRIPTION
The file /etc/anacrontab describes the jobs controlled by anacron(8). Its lines can be of three kinds: job-description lines, environment assignments, or empty lines. Job-description lines are of one of these two forms: period delay job-identifier command @period_name delay job-identify command The period is specified in days, the delay in minutes. The job-identifier can contain any non-blank character, except slashes. It is used to identify the job in Anacron messages, and as the name for the job's timestamp file. The command can be any shell command. The fields can be separated by blank spaces or tabs. The period_name can only be set to monthly at the present time. This will ensure jobs are only run once a month, no matter the number of days in this month, or the previous month. Environment assignment lines are of the form: VAR = VALUE Spaces around VAR are removed. No spaces around VALUE are allowed (unless you want them to be part of the value). The assignment takes effect from the next line to the end of the file, or to the next assignment of the same variable. Empty lines are either blank lines, line containing white-space only, or lines with white-space followed by a '#' followed by an arbitrary comment. You can continue a line onto the next line by ending it with a ''. SEE ALSO
anacron(8) The Anacron README file. AUTHOR
Itai Tzur <itzur@actcom.co.il> Currently maintained by Pascal Hakim <pasc@(debian.org|redellipse.net)>. Pascal Hakim 2004-07-11 ANACRONTAB(5)
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