hello stephen
murad@murad:/var/log$ ls -l /var/log
total 832024
-rw-r--r-- 1 root root 897 Apr 6 01:14 alternatives.log
-rw-r--r-- 1 root root 12193 Mar 28 13:38 alternatives.log.1
-rw-r--r-- 1 root root 380 Feb 28 06:32 alternatives.log.2.gz
-rw-r--r-- 1 root root 194 Jan 15 06:04 alternatives.log.3.gz
-rw-r--r-- 1 root root 1702 Dec 16 20:00 alternatives.log.4.gz
-rw-r--r-- 1 root root 154 Nov 19 06:26 alternatives.log.5.gz
-rw-r--r-- 1 root root 6610 Oct 25 12:14 alternatives.log.6.gz
-rw-r----- 1 root adm 0 Mar 4 00:00 apport.log
-rw-r----- 1 root adm 624 Mar 3 21:52 apport.log.1
-rw-r----- 1 root adm 346 Feb 25 13:23 apport.log.2.gz
-rw-r----- 1 root adm 224 Dec 7 09:08 apport.log.3.gz
-rw-r----- 1 root adm 334 Nov 5 06:59 apport.log.4.gz
-rw-r----- 1 root adm 662 Oct 25 12:34 apport.log.5.gz
-rw-r----- 1 root adm 250 Oct 19 21:49 apport.log.6.gz
drwxr-xr-x 2 root root 4096 Apr 6 09:50 apt
-rw-r----- 1 syslog adm 17773828 Apr 6 20:25 auth.log
-rw-r----- 1 syslog adm 44835056 Apr 4 00:00 auth.log.1
-rw-r----- 1 syslog adm 361622 Mar 29 00:00 auth.log.2.gz
-rw-r----- 1 syslog adm 3185099 Mar 28 00:00 auth.log.3.gz
-rw-r----- 1 syslog adm 488812 Mar 22 00:00 auth.log.4.gz
-rw-r--r-- 1 root root 56751 Jul 25 2018 bootstrap.log
-rw-rw---- 1 root utmp 47589888 Apr 6 20:25 btmp
-rw-rw---- 1 root utmp 208658304 Apr 1 00:00 btmp.1
-rw-r--r-- 1 syslog adm 801843 Feb 19 07:33 cloud-init.log
-rw-r--r-- 1 root root 38427 Feb 19 07:33 cloud-init-output.log
drwxr-xr-x 2 root root 4096 Apr 6 00:00 cups
drwxr-xr-x 3 root root 4096 Oct 19 19:22 dist-upgrade
-rw-r--r-- 1 root adm 82693 Feb 19 07:33 dmesg
-rw-r--r-- 1 root adm 82733 Dec 14 13:03 dmesg.0
-rw-r--r-- 1 root adm 21049 Oct 25 12:18 dmesg.1.gz
-rw-r--r-- 1 root adm 21012 Oct 25 11:55 dmesg.2.gz
-rw-r--r-- 1 root adm 20938 Oct 22 11:36 dmesg.3.gz
-rw-r--r-- 1 root adm 20761 Oct 20 10:47 dmesg.4.gz
-rw-r--r-- 1 root root 9277 Apr 6 09:53 dpkg.log
-rw-r--r-- 1 root root 87720 Mar 30 06:54 dpkg.log.1
-rw-r--r-- 1 root root 16417 Feb 28 06:32 dpkg.log.2.gz
-rw-r--r-- 1 root root 4470 Jan 30 06:54 dpkg.log.3.gz
-rw-r--r-- 1 root root 9703 Dec 16 20:00 dpkg.log.4.gz
-rw-r--r-- 1 root root 4991 Nov 30 17:56 dpkg.log.5.gz
-rw-r--r-- 1 root root 146715 Oct 30 06:14 dpkg.log.6.gz
drwxrwsrwx 2 elasticsearch elasticsearch 4096 Apr 6 19:31 elasticsearch
-rw-r--r-- 1 root root 2049792 Apr 4 08:43 faillog
drwx------ 2 root root 4096 Apr 3 20:28 filebeat
-rw-r--r-- 1 root root 3893 Mar 28 13:36 fontconfig.log
drwxr-xr-x 2 root root 4096 Sep 8 2020 gdm3
drwxr-xr-x 2 root root 4096 Oct 12 13:57 installer
drwxr-sr-x+ 3 root systemd-journal 4096 Oct 12 14:05 journal
-rw-r----- 1 syslog adm 113997 Apr 6 20:20 kern.log
-rw-r----- 1 syslog adm 134848 Apr 3 23:35 kern.log.1
-rw-r----- 1 syslog adm 9246 Mar 28 23:21 kern.log.2.gz
-rw-r----- 1 syslog adm 19116 Mar 26 07:18 kern.log.3.gz
-rw-r----- 1 syslog adm 2029 Mar 21 23:32 kern.log.4.gz
drwxrwsrwx 2 kibana kibana 4096 Mar 28 22:14 kibana
drwxr-xr-x 2 landscape landscape 4096 Oct 12 14:06 landscape
-rw-rw-r-- 1 root utmp 18704352 Apr 6 17:56 lastlog
drwx------ 2 root root 4096 Apr 6 14:58 letsencrypt
drwxr-xr-x 5 root root 4096 Feb 25 13:12 libvirt
drwxr-xr-x 2 root root 4096 Apr 5 00:00 lightdm
drwxr-x--- 2 www-data www-data 4096 Apr 4 00:00 lighttpd
drwxr-xr-x 2 logstash root 4096 Apr 2 17:14 logstash
drwx------ 2 root root 4096 Apr 4 21:28 metricbeat
-rw-r----- 1 root adm 1553828 Apr 6 20:24 monit.log
-rw-r----- 1 root adm 1600645 Mar 31 00:00 monit.log.1
-rw-r----- 1 root adm 46454 Mar 24 00:00 monit.log.2.gz
-rw-r----- 1 root adm 63318 Mar 19 00:00 monit.log.3.gz
-rw-r----- 1 root adm 64098 Mar 12 00:01 monit.log.4.gz
drwxr-xr-x 2 root adm 4096 Apr 3 00:00 nginx
drwxr-xr-x 2 pihole pihole 4096 Oct 24 10:29 pihole
-rw-r--r-- 1 root pihole 32635 Mar 24 20:29 pihole_debug.log
-rw-r--r-- 1 pihole pihole 0 Apr 5 00:00 pihole-FTL.log
-rw-r--r-- 1 pihole pihole 230325 Apr 5 00:00 pihole-FTL.log.1
-rw-r--r-- 1 pihole pihole 86864 Apr 4 00:00 pihole-FTL.log.2.gz
-rw-r--r-- 1 pihole pihole 63883 Apr 3 00:00 pihole-FTL.log.3.gz
-rw-r--r-- 1 pihole pihole 0 Apr 5 00:00 pihole.log
-rw-r--r-- 1 pihole pihole 2875685 Apr 5 00:00 pihole.log.1
-rw-r--r-- 1 pihole pihole 334207 Apr 4 00:00 pihole.log.2.gz
-rw-r--r-- 1 pihole pihole 161139 Apr 3 00:00 pihole.log.3.gz
-rw-r--r-- 1 pihole pihole 108158 Apr 2 00:00 pihole.log.4.gz
-rw-r--r-- 1 pihole pihole 129892 Apr 1 00:00 pihole.log.5.gz
-rw-r--r-- 1 root root 1249 Apr 4 04:41 pihole_updateGravity.log
drwx------ 2 root root 4096 Oct 19 19:24 private
-rw-r----- 1 syslog adm 5827268 Apr 6 20:25 syslog
-rw-r----- 1 syslog adm 7957689 Apr 6 00:00 syslog.1
-rw-r----- 1 syslog adm 299863 Apr 5 00:00 syslog.2.gz
-rw-r----- 1 syslog adm 491704 Apr 4 00:00 syslog.3.gz
-rw-r----- 1 syslog adm 371759 Apr 3 00:00 syslog.4.gz
-rw-r----- 1 syslog adm 225491 Apr 2 00:00 syslog.5.gz
-rw-r----- 1 syslog adm 218439 Apr 1 00:00 syslog.6.gz
-rw-r----- 1 syslog adm 543051 Mar 31 00:00 syslog.7.gz
-rw------- 1 root root 4099584 Apr 4 08:43 tallylog
-rw------- 1 root root 0 Oct 19 19:33 ubuntu-advantage.log
-rw-r----- 1 syslog adm 108676 Apr 6 20:20 ufw.log
-rw-r----- 1 syslog adm 126715 Apr 3 23:35 ufw.log.1
-rw-r----- 1 syslog adm 9246 Mar 28 23:21 ufw.log.2.gz
-rw-r----- 1 syslog adm 18528 Mar 26 07:18 ufw.log.3.gz
-rw-r----- 1 syslog adm 1863 Mar 21 23:32 ufw.log.4.gz
drwxr-x--- 2 root adm 4096 Apr 1 00:00 unattended-upgrades
-rw-r----- 1 root adm 218988 Apr 6 20:21 vsftpd.log
-rw-r----- 1 root adm 316860 Apr 3 23:58 vsftpd.log.1
-rw-r----- 1 root adm 27116 Mar 29 00:00 vsftpd.log.2
-rw-r----- 1 root adm 136611 Mar 28 00:00 vsftpd.log.3
-rw-r----- 1 root adm 23425 Mar 21 23:55 vsftpd.log.4
-rw-rw-r-- 1 root utmp 137472 Apr 6 17:56 wtmp
-rw-r--r-- 1 root root 16703 Feb 19 07:33 Xorg.0.log
-rw-r--r-- 1 root root 17098 Feb 19 07:30 Xorg.0.log.old
-rw-r--r-- 1 root root 17732 Dec 10 12:36 Xorg.1.log
-rw-r--r-- 1 root root 17465 Dec 10 12:35 Xorg.1.log.old
-rw-r----- 1 xrdp adm 502174785 Apr 6 20:25 xrdp.log
-rw-r----- 1 root adm 135129 Mar 20 01:11 xrdp-sesman.log
and
murad@murad:/var/log$ curl localhost:9200
{
"name" : "node-1",
"cluster_name" : "murad",
"cluster_uuid" : "11NpBIUMRHGE4HgUxcTZzA",
"version" : {
"number" : "7.12.0",
"build_flavor" : "default",
"build_type" : "deb",
"build_hash" : "78722783c38caa25a70982b5b042074cde5d3b3a",
"build_date" : "2021-03-18T06:17:15.410153305Z",
"build_snapshot" : false,
"lucene_version" : "8.8.0",
"minimum_wire_compatibility_version" : "6.8.0",
"minimum_index_compatibility_version" : "6.0.0-beta1"
},
"tagline" : "You Know, for Search"