I looked for the xi-upgrade log but i didn't find any such log in any directory.
please see the results you asked.
uname -a
Linux server_name 3.10.0-862.14.4.el7.x86_64 #1 SMP Fri Sep 21 09:07:21 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
[root@server_name nagiosxi]# cat /etc/*release
NAME="Red Hat Enterprise Linux Server"
VERSION="7.5 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"
VERSION_ID="7.5"
PRETTY_NAME="Cloud Suite"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:7.5:GA:server"
HOME_URL="
https://www.redhat.com/"
BUG_REPORT_URL="
https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_BUGZILLA_PRODUCT_VERSION=7.5
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="7.5"
Red Hat Enterprise Linux Server release 7.5 (Maipo)
Red Hat Enterprise Linux Server release 7.5 (Maipo)
[root@server_name nagiosxi]# yum list installed | grep nagiosxi
nagiosxi.x86_64 5.6.3-2.el7 installed
nagiosxi-mrtg.x86_64 5.6.3-2.el7 installed
nagiosxi-nagioscore.x86_64 5.6.3-2.el7 installed
nagiosxi-nagiosmobile.x86_64 5.6.3-2.el7 installed
nagiosxi-nagiosplugins.x86_64 5.6.3-2.el7 installed
nagiosxi-nagvis.x86_64 5.6.3-2.el7 installed
nagiosxi-ndoutils.x86_64 5.6.3-2.el7 installed
nagiosxi-nrds.x86_64 5.6.3-2.el7 installed
nagiosxi-nrpe.x86_64 5.6.3-2.el7 installed
nagiosxi-nsca.x86_64 5.6.3-2.el7 installed
nagiosxi-nxti.x86_64 5.6.3-2.el7 installed
nagiosxi-pnp.x86_64 5.6.3-2.el7 installed
nagiosxi-shellinabox.x86_64 5.6.3-2.el7 installed
nagiosxi-wkhtmltox.x86_64 5.6.3-2.el7 installed
nagiosxi-wmic.x86_64 5.6.3-2.el7 installed
[root@server_name ~]# cd /tmp/
[root@server_name tmp]# ls -ltr
total 294468
drwx------ 3 root root 17 Apr 22 08:01 systemd-private-34ae6df9c9704d2e9a485bac47b0c790-chronyd.service-WX14VR
drwx------ 3 root root 17 May 7 14:04 systemd-private-34ae6df9c9704d2e9a485bac47b0c790-nrpe.service-zXIslR
-rw-r--r-- 1 user maost 188182022 Jul 17 14:46 nagiosxi.1563307681.tar.gz
-rw-r--r-- 1 user maost 38823 Jul 17 15:19 ccm.inc.php
-rw-r--r-- 1 user maost 281157 Jul 17 15:19 dbauth.inc.php
drwx------ 3 root root 17 Jul 17 15:23 systemd-private-34ae6df9c9704d2e9a485bac47b0c790-mariadb.service-wkTLmq
drwx------ 3 root root 17 Jul 17 15:23 systemd-private-34ae6df9c9704d2e9a485bac47b0c790-httpd.service-f18AGR
-rw-r--r-- 1 user maost 113025921 Jul 17 15:27 nagiosxi-5.6.3-2.el7.x86_64.tar.gz
drwxr-xr-x 3 root root 64 Jul 17 15:27 rpms
drwx------ 3 root root 17 Jul 17 15:34 systemd-private-34ae6df9c9704d2e9a485bac47b0c790-ndo2db.service-uNw02E
drwxr-xr-x 2 s613579 argent 6 Jul 18 15:40 hsperfdata_s613579
[root@server_name tmp]# ls -ltr *xi*
-rw-r--r-- 1 user maost 188182022 Jul 17 14:46 nagiosxi.1563307681.tar.gz
-rw-r--r-- 1 user maost 113025921 Jul 17 15:27 nagiosxi-5.6.3-2.el7.x86_64.tar.gz
[root@server_name tmp]# ls -ltr *xi-up*
ls: cannot access *xi-up*: No such file or directory
[root@server_name tmp]# find / -name *xi-up*
find: '/softlib/instlib/Linux/CACM/12.8/archive': Permission denied
find: '/softlib/instlib/Linux/CACM/12.8-2666/tar': Permission denied
find: '/softlib/instlib/Linux/CACM/12.8-2666/archive': Permission denied