Wireless Controller
Dedicated Wi-Fi control and management for high density and mobility
Article Id 197033
This article describes how to clear space on the Controller.

Related link.
For version 8.3.x, 8.4.X and 8.5.X.

SSH into the controller.
1) Check how much space is used or free on the Controller.
wlc(15)# sh file systems
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root               897363    465111    384375  55% /
2) Check whether any older or current firmware is available in the flash.
wlc(15)# sh flash
wlc(15) 7.0-8-0
If yes, delete older and current firmware.
wlc# delete flash: <code name from show flash output>
wlc# delete flash: 7.0-8-0
3) Check whether any diagnostics, kernel-diag, old backup files on the controller.
wlc(15)# dir
-rwxrwxrwx 1 root root  72120 Feb  3 16:13 backup8.4.5
-rwxrwxrwx 1 root root 10270366 Jul  1 16:31 xxxx-controller-diagnostics.xxxx-master.2020-07-01.16-30-36.tar.gz
-rwxrwxrwx 1 root root 10377790 Jul  1 17:55 xxxx-system-diagnostics.xxxx-master.2020-07-01.17-54-14.tar.gz
If yes, delete diagnostics, kernel-diag and old backup files.
wlc(15)# delete meru-controller-diagnostics.Meru-master.2020-07-01.16-30-36.tar.gz
wlc(15)# delete meru-system-diagnostics.Meru-master.2020-07-01.17-54-14.tar.gz
wlc(15)# delete backup8.4.5
4) Delete captures from Controller.
wlc(15)# cd capture
wlc(15)# dir
total 16
-rw------- 1 root root 16291 Sep 24 15:21 eth_00001_20200924152144.pcap
wlc(15)# delete eth_00001_20200924152144.pcap
wlc(15)# dir
total 0
5) Delete patches from controller.
wlc(15)# sh patch

wlc(15)# delete flash: 8.5-2build-5-patch-BUGxxxxx-3006201131-i386
Deleting upgrade image images/meru-8.5-2build-5-patch-BUGxxxxx-3006201131-i386
wlc(15)# sh patch
wlc(15)# exit