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Delete lines starting with XX or YY or ZZ or ....

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# 1  
Old 11-13-2007
Java Delete lines starting with XX or YY or ZZ or ....
Hi There!

My final task for today is to delete lines starting with certain numbers

for e.g., my text block is
Quote:
P1
10,9:12/123456789
10,10:1
11,10:60
15,9:5/12345
15,10:1
15,14:1001
17,9:12/123456789
17,10:1
21,1:1
22,2:2
and i want to delete all lines starting with 11 or 17 or 21

I know i can use multiple sed commands like

sed '/^11,/d' <filename>
sed '/^17,/d' <filename>
sed '/^21,/d' <filename>

but is there any way of doing this in one sed command?

for e.g. sed '/^[11|17|21]/d' <filename>

Thanks again!
# 2  
Old 11-13-2007
Code:
sed '/^1[17],/d;/^21,/d' filename

# 3  
Old 11-13-2007
Or with grep:

Code:
egrep -v '^(1[17]|21),' filename

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