I want to display logs for last 24 hours
I trid this but this is not best and dynamic way.
utmpdump /var/log/wtmp* | awk '/2022-09-22/, /2022-09-23/'
Any other way to display when you run script it should take last 24 hours
log file
[8] [528314] [ ] [ ] [pts/1 ] [ ] [0.0.0.0 ] [2022-09-18T18:44:12,422480+00:00]
[8] [476233] [ ] [ ] [pts/0 ] [ ] [0.0.0.0 ] [2022-09-18T19:25:11,585556+00:00]
[7] [544366] [ts/0] [centos ] [pts/0 ] [92.46.127.82 ] [92.46.127.82 ] [2022-09-19T04:59:51,304439+00:00]
[8] [544366] [ ] [ ] [pts/0 ] [ ] [0.0.0.0 ] [2022-09-19T04:59:51,517787+00:00]
[7] [544366] [ts/0] [centos ] [pts/0 ] [92.46.127.82 ] [92.46.127.82 ] [2022-09-19T04:59:54,121598+00:00]
[8] [544366] [ ] [ ] [pts/0 ] [ ] [0.0.0.0 ] [2022-09-19T04:59:54,361475+00:00]
[7] [544366] [ts/0] [centos ] [pts/0 ] [92.46.127.82 ] [92.46.127.82 ] [2022-09-19T04:59:56,613335+00:00]
[8] [544366] [ ] [ ] [pts/0 ] [ ] [0.0.0.0 ] [2022-09-19T04:59:56,810335+00:00]
[7] [544822] [ts/0] [centos ] [pts/0 ] [92.46.127.82 ] [92.46.127.82 ] [2022-09-19T05:01:33,299161+00:00]
[8] [544822] [ ] [ ] [pts/0 ] [ ] [0.0.0.0 ] [2022-09-19T05:01:33,572603+00:00]
[7] [544822] [ts/0] [centos ] [pts/0 ] [92.46.127.82 ] [92.46.127.82 ] [2022-09-19T05:01:33,897001+00:00]
[8] [544822] [ ] [ ] [pts/0 ] [ ] [0.0.0.0 ] [2022-09-19T05:01:34,152397+00:00]
[7] [544822] [ts/0] [centos ] [pts/0 ] [92.46.127.82 ] [92.46.127.82 ] [2022-09-19T05:01:34,438247+00:00]
[8] [544822] [ ] [ ] [pts/0 ] [ ] [0.0.0.0 ] [2022-09-19T05:01:34,696364+00:00]
[7] [544822] [ts/0] [centos ] [pts/0 ] [92.46.127.82 ] [92.46.127.82 ] [2022-09-19T05:01:34,978371+00:00
>Solution :
Not necessarily exactly 24 hours (but your question also only filters for yesterday and today, regardless of the current hour), but perhaps you are looking for command substitution to substitute yesterday’s and today’s date?
utmpdump /var/log/wtmp* | awk "/$(date -I -dyesterday)/,/$(date -I)/"