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Full Discussion: Delete the last empty/blank line of the text file
Top Forums Shell Programming and Scripting Delete the last empty/blank line of the text file Post 302567505 by senayasma on Monday 24th of October 2011 10:38:05 AM
Old 10-24-2011
Delete the last empty/blank line of the text file
Hi All,

I have a file.txt which seems like having three lines.

Code:
 
wc -l file.txt

3 file.txt

In fact, once it is open in text editor, this file has four lines where the last line is empty. how can i delete this last empty line of the file.txt? I tried the codes below so far but they did not work.


Code:
 
sed -i '/^ *$/d' file.txt > output.txt
awk 'NR > 1{print t} {t = $0}END{if (NF) print }' file.txt > output.txt
sed '${/^$/d}' file.txt > output.txt
sed '${/./!d}' file.txt > output.txt
sed '/^$/d' file.txt > output.txt
grep -v '^$' file.txt > output.txt

Thanks,
 

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LEARN ABOUT DEBIAN

x2sys_merge

X2SYS_MERGE(1gmt)					       Generic Mapping Tools						 X2SYS_MERGE(1gmt)

NAME

       x2sys_merge - Merge an updated COEs tables

SYNOPSIS

       x2sys_merge -Amain_COElist.d -Mnew_COElist.d

DESCRIPTION

       x2sys_merge  will read two crossovers data base and output the contents of the main one updated with the COEs in the second one. The second
       file should only contain updated COEs relatively to the first one.  That is, it MUST NOT contain any new  two  tracks  intersections  (This
       point  is  NOT checked in the code). This program is useful when, for any good reason like file editing NAV correction or whatever, one had
       to recompute only the COEs between the edited files and the rest of the database.

       -A     Specify the file main_COElist.d with the main crossover error data base.

       -M     Specify the file new_COElist.d with the newly computed crossover error data base.

OPTIONS

       No space between the option flag and the associated arguments.

       EXAMPLES
	      To update the main COE_data.txt with the new COEs estimations saved in the smaller COE_fresh.txt, try

	      x2sys_merge -ACOE_data.txt -MCOE_fresh.txt > COE_updated.txt

SEE ALSO

       x2sys_binlist(1), x2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1), x2sys_list(1), x2sys_put(1), x2sys_report(1)

GMT 4.5.7							    15 Jul 2011 						 X2SYS_MERGE(1gmt)
All times are GMT -4. The time now is 05:45 PM.
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