How to see full cron log (Not of just 1 day or less)?

Question

I want see all the jobs that has been scheduled by using cron for the last 1 week (or certain specified time). I used the command

sudo grep CRON /var/log/syslog

But it only shows the log for 1 day. Is there any command in Ubuntu to track them?

https://askubuntu.com/questions/56683/where-is-the-cron-crontab-log#121560 — d a i s y, Sep 14 '17 at 04:38
@pa4080 That answer only shows the log for a day or even less. I needed more and have got the answer too. Thanks. — Sagun Shrestha, Sep 15 '17 at 09:27

score 8 · Answer 1 · edited Sep 15 '17 at 11:12

8

Another alternative is

sudo zgrep CRON /var/log/syslog*

zgrep uncompresses files if needed. Options same as for grep.

edited Sep 15 '17 at 11:12

d a i s y

answered Sep 14 '17 at 22:10

Wirewrap

score 4 · Accepted Answer · answered Sep 14 '17 at 04:53

You can do this to newer syslog files:

cd /var/log
cat syslog.1 syslog | grep CRON

To the oldest you must do it:

cd /var/log
zcat syslog syslog.4.gz syslog.3.gz syslog.2.gz | grep CRON

It's a good idea to do these commands nested in loops, specially to zcat, since syslog.#.gz are more numerous.

You can even store them into another file to analyze better:

cd /var/log
zcat syslog syslog.4.gz syslog.3.gz syslog.2.gz | grep CRON > ~/cronanalysis.txt
cat syslog.1 syslog | grep CRON >> ~/cronanalysis.txt

The order of syslog files is inverted, so you put older to head and newer events to tail.

score 0 · Answer 3 · edited Nov 21 '20 at 23:45

0

On Amazon Linux you can find it in /var/log/cron file

tail /var/log/cron

edited Nov 21 '20 at 23:45

tinlyx

answered Nov 17 '20 at 05:57

Ravi Sethia

3 Answers3