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ファイルを開かずに行数を指定して削除する

Last updated at Posted at 2014-06-18

ログをあさったりするときにちょくちょく使うコマンド。
よく忘れるので書いておく。

1.行数カウントする

$ wc -l hoge.log
12221189 hoge.log

2.古い時間帯は必要ないので削除

$ time sed -e "1,11000000d" hoge.log > fuga.log

real	0m4.415s
user	0m2.438s
sys	0m1.973s
$
$ wc -l fuga.log
1221189 fuga.log

はやいね!

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