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Start the line only with numbers

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# 1  
Old 08-13-2012
Start the line only with numbers
hi,

I need some unix command to replace the following thing. The line shuld start with oly numbers. If it starts with anything other than number it shuld be taken back to the last line.

My file:

Code:
1234|test
weye|test1|break
576|test|break|title
2369|test|line|break
tite|break
234589|test|like|break

Output should be like below:
Code:
1234|testweye|test1|break
576|test|break|title
2369|test|line|breaktite|break
234589|test|like|break

Last edited by Scott; 08-13-2012 at 04:28 AM.. Reason: Code tags
# 2  
Old 08-13-2012
Bug try this.....
Code:
awk 'END{print RS} /^[0-9]/{if(NR>1)print RS}1' ORS=

This User Gave Thanks to pamu For This Post:
anshaa
# 3  
Old 08-13-2012
If the input file is not huge, this should work:
Code:
sed -n 'H;${;g;s/^\n//;s/\n\{1,\}\([^[:digit:]]\)/\1/g;p;}' infile

Last edited by elixir_sinari; 08-13-2012 at 04:57 AM..
# 4  
Old 08-13-2012
Quote:
Originally Posted by pamu
Code:
awk 'END{print RS} /^[0-9]/{if(NR>1)print RS}1' ORS=


i am getting the following error:
Code:
awk 'END{print RS} /^[0-9]/{if(NR>1)print RS}1' ORS= AOTSIncdt_tckt_latest3.txt
awk: syntax error near line 1
awk: bailing out near line 1

---------- Post updated at 12:54 PM ---------- Previous update was at 12:53 PM ----------

Code:
$ sed -n 'H;${;g;s/^\n//;s/\n\([^[:digit:]]\)/\1/g;p;}' infile
1234|test
weye|test1|break
576|test|break|title
2369|test|line|break
tite|break
234589|test|like|break

I dont get the desired output.. nothing changed.. please help
Last edited by Scott; 08-13-2012 at 04:29 AM.. Reason: Code tags
# 5  
Old 08-13-2012
Quote:
Originally Posted by anshaa
$ sed -n 'H;${;g;s/^\n//;s/\n\([^[:digit:]]\)/\1/g;p;}' infile
1234|test
weye|test1|break
576|test|break|title
2369|test|line|break
tite|break
234589|test|like|break

I dont get the desired output.. nothing changed.. please help
You need to replace infile with the name of your input file...

And for the awk solution, use nawk instead of awk.
# 6  
Old 08-13-2012
Code:
nawk 'END{print RS} /^[0-9]/{if(NR>1)print RS}1' ORS= filename > filename1

Works perfectly.
Last edited by Scott; 08-13-2012 at 06:34 AM.. Reason: Code tags
# 7  
Old 08-13-2012
This is working as expected...

Code:
$ cat temp_test
1234|test
weye|test1|break
576|test|break|title
2369|test|line|break
tite|break
234589|test|like|break

$ awk 'END{print RS} /^[0-9]/{if(NR>1)print RS}1' ORS= temp_test
1234|testweye|test1|break
576|test|break|title
2369|test|line|breaktite|break
234589|test|like|break
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