CODEWITHSUNDEEP
unixsed
ank-ankur
ank-ankur

Reputation: 3

Unix- Sed replacing substring

I am new to sed . I want to replace a substring

for example:

var1=server1:game1,server2:game2,sever3:game1

output should be

server1 server2 server3 (with just spaces)

I have tried this.

echo $var1 | sed 's/,/ /g' | sed 's/:* / /g'

This is not working. Please suggest a solution.

Upvotes: 0

Views: 229

Answers (4)

Phil H
Phil H

Reputation: 20131

Just for info, you are really only matching, not replacing, so grep can be your friend (with -P):

grep -oP '[^:,=]+(?=:)'

That matches a number of characters that aren't :,= followed by a : using lookahead.

This will put the servers on different lines, which may be what you want anyway. You can put them on one line by adding tr:

grep -oP '[^:,=]+(?=:)' | tr '\n' ' '

Upvotes: 0

Jotne
Jotne

Reputation: 41446

An awk variation using same regex as sed

awk '{gsub(/:[^,]+,?/," ")}1' <<< "$var1"

PS Its always good custom to "quote" variables

Upvotes: 0

sat
sat

Reputation: 14949

You can try this sed,

echo $var1 | sed 's/:[^,]\+,\?/ /g'

Explanation:

:[^,]\+, - It will match the string from : to ,

\? - Previous may occur or may not ( Since end of line don't have , )

Upvotes: 1

Tejas Kale
Tejas Kale

Reputation: 415

echo $var1 | sed s/:game[0-9],*/\ /

Assuming your sub string has game followed by a number([0-9]*)

Upvotes: 0

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