使用 grep 和 awk 从日志文件中提取特定时间线

使用 grep 和 awk 从日志文件中提取特定时间线

我想提取特定时间之间的所有行,以及附加的文件名。

输入示例:

Dec  8 22:00:05 host kernel:
Dec  8 23:00:05 host kernel:
Dec  8 23:34:45 host kernel:
Dec  8 23:54:45 host kernel:
Dec  9 00:34:45 host kernel:
Dec  9 00:54:45 host kernel:
Dec  9 01:54:45 host kernel:
Dec  9 02:54:45 host kernel:
Dec  9 03:54:45 host kernel:
Dec  9 04:54:45 host kernel:
Dec  9 05:54:45 host kernel:

我想要的输出:

Dec  8 23:00:05 host kernel:
Dec  8 23:34:45 host kernel:
Dec  8 23:54:45 host kernel:
Dec  9 00:34:45 host kernel:
Dec  9 00:54:45 host kernel:

答案1

怎么样磨坊主

$ mlr --nidx --repifs filter -S '
    t = strptime($3,"%H:%M:%S"); 
    t > strptime("23:00","%H:%M") || t < strptime("01:00","%H:%M")
' input
Dec 8 23:00:05 hermes kernel: [<ffffffff8118a6f0>] warn_alloc_failed+0x110/0x180
Dec 8 23:34:45 hermes kernel: [<ffffffff816a204a>] __alloc_pages_slowpath+0x6b6/0x724
Dec 8 23:54:45 hermes kernel: [<ffffffff81424400>] ? misc_open+0x40/0x1c0
Dec 9 00:34:45 hermes kernel: [<ffffffff8118ec85>] __alloc_pages_nodemask+0x405/0x420
Dec 9 00:54:45 hermes kernel: [<ffffffff8118ec85>] __alloc_pages_nodemask+0x405/0x420

答案2

如果我理解正确的话,使用 GNU grep

grep -e "00:[0-5][0-9]:[0-5][0-9]" -e "23:[0-5][0-9]:[0-5][0-9]" in_file > out_file

寻找德模式00:[<0 to five><0 to nine>]:[<0 to five><0 to nine>]

或图案23:[<0 to five><0 to nine>]:[<0 to five><0 to nine>]

答案3

对于 Perl,假设您想从 12 月 8 日晚上 11 点开始并延长 2 小时:

perl -MTime::Piece -lane '
    BEGIN {
        $start = Time::Piece->strptime("Dec 8 23:00:00", "%b %d %T");
        $stop = $start + 2*3600;
    }
    $t = Time::Piece->strptime("@F[0,1,2]", "%b %d %T");
    print if $start <= $t && $t <= $stop;
' file

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