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delete lines starting with a pattern

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# 1  
Old 11-06-2011
delete lines starting with a pattern
i have a file sample.txt containing
Quote:
123
hii 123
hello
123
123
hii
hello
i want to delete lines starting with 123 neglecting spaces and tabs.
but not lines containing 123. i.e.
i want files sample.txt as
Quote:
hii 123
hello
hii
hello
help me
thanxx
# 2  
Old 11-06-2011
Try with grep..
Code:
grep -v '^[0-9]' inputfile

This User Gave Thanks to michaelrozar17 For This Post:
yashwantkumar
# 3  
Old 11-06-2011
Code:
 sed 's/^ *//g;/^123/d' input_file

--ahamed
This User Gave Thanks to ahamed101 For This Post:
yashwantkumar
# 4  
Old 11-07-2011
thnx for reply !
# 5  
Old 11-07-2011
Code:
awk '$1!=123' infile

or
Code:
awk '$1!="abc"' infile

for text
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