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Shell Programming and Scripting

Delete lines that starts with a certain letter

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# 1  
Old 06-21-2009
Delete lines that starts with a certain letter
How can I delete those lines that starts with a certain letter?
Code:
abc def ghi
xyz abc def
ace gik moq
abe imq gxm

I want to delete the line that starts with "x". Thanks!
Last edited by Yogesh Sawant; 06-22-2009 at 03:17 AM.. Reason: added code tags
# 2  
Old 06-21-2009
you already know grep/awk from this thread . so make use of those tools. check the man page.
# 3  
Old 06-21-2009
try this code

Code:
 sed '/^x/d' file.txt

BR
# 4  
Old 06-22-2009
using Perl:
Code:
perl -i -ne 'print unless /^x/' file.txt

# 5  
Old 06-22-2009
Or

Code:
grep -v \^x file.txt

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