くだらねえ質問はここに書き込め！ Part 236

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sed -n 's/^CN\t//p' cidr.txtの結果
↓
Name: BLACKLIST
Type: hash:net
Revision: 6
Header: family inet hashsize 1024 maxelem 65536
Size in memory: 376
References: 0
Number of entries: 0
Members:

sed -n 's/^(CN|KR|KP|RU|CA)\t//p' cidr.txtの結果
↓
Name: BLACKLIST
Type: hash:net
Revision: 6
Header: family inet hashsize 1024 maxelem 65536
Size in memory: 376
References: 0
Number of entries: 0
Members:

どちらも「ipset --list BLACKLIST」の結果です。