Delete lines starting with XX or YY or ZZ or .... - Shell Programming and Scripting

orno · #1 11-13-2007

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!

vgersh99 · #2 11-13-2007

Code:

sed '/^1[17],/d;/^21,/d' filename

radoulov · #3 11-13-2007

Or with grep:

Code:

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

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