GL-MT300N-V2 - GL.iNet after upgrade to 3.201 Free space: 6% (0 MB)

You can’t compare embedded linux to something like Ubuntu. OpenWRT has it’s own config files. It is also OpenWRT that directly recommends not to keep configs going from major versions.

1 Like

@GL-FUN @makino16

2 Likes

@Johnex this gadget might be in hands of those, who may not know how to do it. your advice is not very useful for those, sorry.

can you tell me, what is normal, and how I can check that that on my side, please?

@GL-FUN You are welcome :+1: . I’m sure it will be useful for a lot of people including @makino16 :grin:

1 Like

i am sure! it is useful for me too, but not all users even understand what you are talking about. and, therefore, for those, it is not good to progress solving their problems…

OK, what is suspicious below? thanks all for your help!

root@GL-MT300N-V2:~# du -ha /etc/ | sort | egrep "\..K"
1.0K /etc/config/ddns
1.0K /etc/config/luci
1.0K /etc/config/luci-opkg
1.0K /etc/config/nodogsplash
1.0K /etc/config/shadowsocks
1.0K /etc/config/ssids
1.0K /etc/config/ucitrack
1.0K /etc/config/ucitrack-opkg
1.0K /etc/config/uhttpd
1.0K /etc/config/wireless
1.0K /etc/dropbear
1.0K /etc/dropbear/dropbear_rsa_host_key
1.0K /etc/forward
1.0K /etc/gcom/runcommand.gcom
1.0K /etc/gcom/setpin.gcom
1.0K /etc/hotplug.d/iface/25-glqos
1.0K /etc/hotplug.d/net/30-tethering
1.0K /etc/hotplug.d/tty
1.0K /etc/hotplug.d/tty/30-3g
1.0K /etc/hotplug.d/usb/20-usbmuxd
1.0K /etc/hotplug.d/usbmisc
1.0K /etc/hotplug.d/usbmisc/00_wwan.sh
1.0K /etc/init.d/cron
1.0K /etc/init.d/ddns
1.0K /etc/init.d/firewall
1.0K /etc/init.d/gl_monitor
1.0K /etc/init.d/gpio_switch
1.0K /etc/init.d/lighttpd
1.0K /etc/init.d/set-irq-affinity
1.0K /etc/init.d/stubby
1.0K /etc/init.d/sysfixtime
1.0K /etc/init.d/system
1.0K /etc/lighttpd/conf.d/30-cgi.conf
1.0K /etc/lighttpd/conf.d/30-expire.conf
1.0K /etc/mwan3.user
1.0K /etc/openvpn/ovpn4/cert/202006111436-Wdc.key
1.0K /etc/preinit
1.0K /etc/rc.button/rfkill
1.0K /etc/rc.local
1.0K /etc/samba
1.0K /etc/samba/smb.conf.template
1.0K /etc/ssl/certs/AffirmTrust_Premium_ECC.crt
1.0K /etc/ssl/certs/Amazon_Root_CA_3.crt
1.0K /etc/ssl/certs/Amazon_Root_CA_4.crt
1.0K /etc/ssl/certs/COMODO_ECC_Certification_Authority.crt
1.0K /etc/ssl/certs/DigiCert_Assured_ID_Root_G3.crt
1.0K /etc/ssl/certs/DigiCert_Global_Root_G3.crt
1.0K /etc/ssl/certs/GTS_Root_R3.crt
1.0K /etc/ssl/certs/GTS_Root_R4.crt
1.0K /etc/ssl/certs/GlobalSign_ECC_Root_CA_-<em>R4.crt
1.0K /etc/ssl/certs/GlobalSign_ECC_Root_CA</em>-<em>R5.crt
1.0K /etc/ssl/certs/Hellenic_Academic_and_Research_Institutions_ECC_RootCA_2015.crt
1.0K /etc/ssl/certs/OISTE_WISeKey_Global_Root_GC_CA.crt
1.0K /etc/ssl/certs/SSL.com_EV_Root_Certification_Authority_ECC.crt
1.0K /etc/ssl/certs/SSL.com_Root_Certification_Authority_ECC.crt
1.0K /etc/ssl/certs/USERTrust_ECC_Certification_Authority.crt
1.0K /etc/ssl/certs/emSign_ECC_Root_CA</em>-<em>C3.crt
1.0K /etc/ssl/certs/emSign_ECC_Root_CA</em>-<em>G3.crt
1.0K /etc/stubby/stubby_nextdns.yml
1.0K /etc/stubby/stubby_nextdns_default.yml
1.0K /etc/sysctl.conf
1.0K /etc/sysctl.d/10-default.conf
1.0K /etc/uhttpd.crt
1.5K /etc/board.d/03_gpio_switches
1.5K /etc/board.json
1.5K /etc/config/dhcp
1.5K /etc/config/dnscrypt-proxy
1.5K /etc/config/glconfig
1.5K /etc/config/network
1.5K /etc/config/qos
1.5K /etc/config/system
1.5K /etc/diag.sh
1.5K /etc/dnsmasq.conf
1.5K /etc/ethertypes
1.5K /etc/hotplug.d/net/20-smp-tune
1.5K /etc/hotplug.json
1.5K /etc/init.d/boot
1.5K /etc/init.d/done
1.5K /etc/init.d/gl_bigdata
1.5K /etc/init.d/sysctl
1.5K /etc/init.d/ucitrack
1.5K /etc/iproute2
1.5K /etc/lighttpd/conf.d/30-proxy.conf
1.5K /etc/nodogsplash/htdocs/images/favicon.ico
1.5K /etc/nodogsplash/htdocs/infoskel.html
1.5K /etc/openvpn/update-resolv-conf
1.5K /etc/profile
1.5K /etc/rc.d
1.5K /etc/ssl/certs/AffirmTrust_Commercial.crt
1.5K /etc/ssl/certs/AffirmTrust_Networking.crt
1.5K /etc/ssl/certs/Amazon_Root_CA_1.crt
1.5K /etc/ssl/certs/Atos_TrustedRoot_2011.crt
1.5K /etc/ssl/certs/Baltimore_CyberTrust_Root.crt
1.5K /etc/ssl/certs/COMODO_Certification_Authority.crt
1.5K /etc/ssl/certs/Certigna.crt
1.5K /etc/ssl/certs/Certum_Trusted_Network_CA.crt
1.5K /etc/ssl/certs/Comodo_AAA_Services_root.crt
1.5K /etc/ssl/certs/Cybertrust_Global_Root.crt
1.5K /etc/ssl/certs/D-TRUST_Root_Class_3_CA_2_2009.crt
1.5K /etc/ssl/certs/DST_Root_CA_X3.crt
1.5K /etc/ssl/certs/DigiCert_Assured_ID_Root_CA.crt
1.5K /etc/ssl/certs/DigiCert_Assured_ID_Root_G2.crt
1.5K /etc/ssl/certs/DigiCert_Global_Root_CA.crt
1.5K /etc/ssl/certs/DigiCert_Global_Root_G2.crt
1.5K /etc/ssl/certs/DigiCert_High_Assurance_EV_Root_CA.crt
1.5K /etc/ssl/certs/EE_Certification_Centre_Root_CA.crt
1.5K /etc/ssl/certs/Entrust.net_Premium_2048_Secure_Server_CA.crt
1.5K /etc/ssl/certs/Entrust_Root_Certification_Authority</em>-<em>EC1.crt
1.5K /etc/ssl/certs/Entrust_Root_Certification_Authority</em>-<em>G2.crt
1.5K /etc/ssl/certs/GlobalSign_Root_CA.crt
1.5K /etc/ssl/certs/GlobalSign_Root_CA</em>-<em>R2.crt
1.5K /etc/ssl/certs/GlobalSign_Root_CA</em>-<em>R3.crt
1.5K /etc/ssl/certs/Go_Daddy_Class_2_CA.crt
1.5K /etc/ssl/certs/Go_Daddy_Root_Certificate_Authority</em>-<em>G2.crt
1.5K /etc/ssl/certs/Hellenic_Academic_and_Research_Institutions_RootCA_2011.crt
1.5K /etc/ssl/certs/Hongkong_Post_Root_CA_1.crt
1.5K /etc/ssl/certs/Microsec_e-Szigno_Root_CA_2009.crt
1.5K /etc/ssl/certs/NetLock_Arany</em>=Class_Gold=<em>FХ‘tanУКsУ­tvУЁny.crt
1.5K /etc/ssl/certs/Network_Solutions_Certificate_Authority.crt
1.5K /etc/ssl/certs/OISTE_WISeKey_Global_Root_GA_CA.crt
1.5K /etc/ssl/certs/OISTE_WISeKey_Global_Root_GB_CA.crt
1.5K /etc/ssl/certs/SZAFIR_ROOT_CA2.crt
1.5K /etc/ssl/certs/SecureSign_RootCA11.crt
1.5K /etc/ssl/certs/SecureTrust_CA.crt
1.5K /etc/ssl/certs/Secure_Global_CA.crt
1.5K /etc/ssl/certs/Security_Communication_RootCA2.crt
1.5K /etc/ssl/certs/Security_Communication_Root_CA.crt
1.5K /etc/ssl/certs/Sonera_Class_2_Root_CA.crt
1.5K /etc/ssl/certs/Starfield_Class_2_CA.crt
1.5K /etc/ssl/certs/Starfield_Root_Certificate_Authority</em>-<em>G2.crt
1.5K /etc/ssl/certs/Starfield_Services_Root_Certificate_Authority</em>-<em>G2.crt
1.5K /etc/ssl/certs/T-TeleSec_GlobalRoot_Class_2.crt
1.5K /etc/ssl/certs/T-TeleSec_GlobalRoot_Class_3.crt
1.5K /etc/ssl/certs/TWCA_Root_Certification_Authority.crt
1.5K /etc/ssl/certs/TrustCor_ECA-1.crt
1.5K /etc/ssl/certs/TrustCor_RootCert_CA-1.crt
1.5K /etc/ssl/certs/Trustis_FPS_Root_CA.crt
1.5K /etc/ssl/certs/Verisign_Class_3_Public_Primary_Certification_Authority</em>-<em>G3.crt
1.5K /etc/ssl/certs/XRamp_Global_CA_Root.crt
1.5K /etc/ssl/certs/certSIGN_ROOT_CA.crt
1.5K /etc/ssl/certs/emSign_Root_CA</em>-<em>C1.crt
1.5K /etc/ssl/certs/emSign_Root_CA</em>-<em>G1.crt
1.5K /etc/stubby/stubby.yml
10.0K /etc/init.d/gl_ipv6
10.0K /etc/opkg
11.5K /etc/init.d/nodogsplash
12.5K /etc/ddns
12.5K /etc/ssl/openssl.cnf
13.5K /etc/config/openvpn
14.5K /etc/board.d/02_network
15.5K /etc/board.d/01_leds
16.5K /etc/hotplug.d/iface
18.0K /etc/lighttpd
19.0K /etc/stubby/stubby.yml.default
194.0K /etc/ssl/certs/ca-certificates.crt
2.0K /etc/chatscripts
2.0K /etc/config/mwan3
2.0K /etc/hotplug.d/firmware
2.0K /etc/hotplug.d/firmware/10-rt2x00-eeprom
2.0K /etc/init.d/qosswitch
2.0K /etc/init.d/rtty
2.0K /etc/lighttpd/lighttpd.conf
2.0K /etc/openvpn/ovpn4/cert/202006111436-ca.crt
2.0K /etc/rc.button/wps
2.0K /etc/ssl/certs/AC_RAIZ_FNMT-RCM.crt
2.0K /etc/ssl/certs/AffirmTrust_Premium.crt
2.0K /etc/ssl/certs/Amazon_Root_CA_2.crt
2.0K /etc/ssl/certs/Buypass_Class_2_Root_CA.crt
2.0K /etc/ssl/certs/Buypass_Class_3_Root_CA.crt
2.0K /etc/ssl/certs/CA_Disig_Root_R2.crt
2.0K /etc/ssl/certs/CFCA_EV_ROOT.crt
2.0K /etc/ssl/certs/D-TRUST_Root_Class_3_CA_2_EV_2009.crt
2.0K /etc/ssl/certs/DigiCert_Trusted_Root_G4.crt
2.0K /etc/ssl/certs/EC-ACC.crt
2.0K /etc/ssl/certs/Entrust_Root_Certification_Authority.crt
2.0K /etc/ssl/certs/GDCA_TrustAUTH_R5_ROOT.crt
2.0K /etc/ssl/certs/GTS_Root_R1.crt
2.0K /etc/ssl/certs/GTS_Root_R2.crt
2.0K /etc/ssl/certs/GeoTrust_Universal_CA_2.crt
2.0K /etc/ssl/certs/GlobalSign_Root_CA</em>-<em>R6.crt
2.0K /etc/ssl/certs/ISRG_Root_X1.crt
2.0K /etc/ssl/certs/IdenTrust_Commercial_Root_CA_1.crt
2.0K /etc/ssl/certs/IdenTrust_Public_Sector_Root_CA_1.crt
2.0K /etc/ssl/certs/QuoVadis_Root_CA_1_G3.crt
2.0K /etc/ssl/certs/QuoVadis_Root_CA_2.crt
2.0K /etc/ssl/certs/QuoVadis_Root_CA_2_G3.crt
2.0K /etc/ssl/certs/QuoVadis_Root_CA_3_G3.crt
2.0K /etc/ssl/certs/Staat_der_Nederlanden_EV_Root_CA.crt
2.0K /etc/ssl/certs/Staat_der_Nederlanden_Root_CA</em>-<em>G3.crt
2.0K /etc/ssl/certs/SwissSign_Gold_CA</em>-<em>G2.crt
2.0K /etc/ssl/certs/TUBITAK_Kamu_SM_SSL_Kok_Sertifikasi</em>-<em>Surum_1.crt
2.0K /etc/ssl/certs/TWCA_Global_Root_CA.crt
2.0K /etc/ssl/certs/Taiwan_GRCA.crt
2.0K /etc/ssl/certs/TeliaSonera_Root_CA_v1.crt
2.0K /etc/ssl/certs/UCA_Extended_Validation_Root.crt
2.0K /etc/ssl/certs/UCA_Global_G2_Root.crt
2.0K /etc/ssl/certs/ePKI_Root_Certification_Authority.crt
2.0K /etc/tertf/tertfinfo_bak
2.0K /etc/uhttpd.key
2.5K /etc/firewall.user
2.5K /etc/gcom/ncm.json
2.5K /etc/hotplug.d/block/10-mount
2.5K /etc/hotplug.d/usb
2.5K /etc/init.d/gl_tertf
2.5K /etc/init.d/log
2.5K /etc/init.d/relayd
2.5K /etc/init.d/sysntpd
2.5K /etc/nodogsplash/htdocs/images/splash.jpg
2.5K /etc/protocols
2.5K /etc/rc.common
2.5K /etc/ssl/certs/Actalis_Authentication_Root_CA.crt
2.5K /etc/ssl/certs/Autoridad_de_Certificacion_Firmaprofesional_CIF_A62634068.crt
2.5K /etc/ssl/certs/COMODO_RSA_Certification_Authority.crt
2.5K /etc/ssl/certs/Certigna_Root_CA.crt
2.5K /etc/ssl/certs/Certum_Trusted_Network_CA_2.crt
2.5K /etc/ssl/certs/E-Tugra_Certification_Authority.crt
2.5K /etc/ssl/certs/Entrust_Root_Certification_Authority</em>-<em>G4.crt
2.5K /etc/ssl/certs/Hellenic_Academic_and_Research_Institutions_RootCA_2015.crt
2.5K /etc/ssl/certs/Hongkong_Post_Root_CA_3.crt
2.5K /etc/ssl/certs/Izenpe.com.crt
2.5K /etc/ssl/certs/LuxTrust_Global_Root_2.crt
2.5K /etc/ssl/certs/QuoVadis_Root_CA.crt
2.5K /etc/ssl/certs/QuoVadis_Root_CA_3.crt
2.5K /etc/ssl/certs/SSL.com_EV_Root_Certification_Authority_RSA_R2.crt
2.5K /etc/ssl/certs/SSL.com_Root_Certification_Authority_RSA.crt
2.5K /etc/ssl/certs/Staat_der_Nederlanden_Root_CA</em>-<em>G2.crt
2.5K /etc/ssl/certs/SwissSign_Silver_CA</em>-<em>G2.crt
2.5K /etc/ssl/certs/TrustCor_RootCert_CA-2.crt
2.5K /etc/ssl/certs/USERTrust_RSA_Certification_Authority.crt
2.5K /etc/sysctl.d
21.0K /etc/init.d/wireguard
21.5K /etc/init.d/gl_init
22.5K /etc/stubby
231.5K /etc/init.d
27.5K /etc/init.d/gl_route_policy
29.5K /etc/init.d/dnsmasq
3.0K /etc/hotplug.d/block/50-samba
3.0K /etc/hotplug.d/iface/15-mwan3
3.0K /etc/init.d/network
3.0K /etc/lighttpd/mime.conf
3.0K /etc/openvpn/ovpn4/cert
3.0K /etc/ssl/certs/ACCVRAIZ1.crt
3.0K /etc/ssl/certs/Chambers_of_Commerce_Root</em>-<em>2008.crt
3.0K /etc/ssl/certs/Global_Chambersign_Root</em>-_2008.crt
3.5K /etc/init.d/glfw
3.5K /etc/lighttpd/server.pem
3.5K /etc/services
32.0K /etc/board.d
34.0K /etc/hotplug.d
4.0K /etc/ddns/services_ipv6
4.0K /etc/hotplug.d/net
4.0K /etc/init.d/led
4.0K /etc/wireless
4.0K /etc/wireless/mt7628
4.0K /etc/wireless/mt7628/mt7628.dat
4.5K /etc/config/uhttpd-opkg
4.5K /etc/firewall.nat6
4.5K /etc/init.d/generate_channel_list
4.5K /etc/init.d/vpn-service
4.5K /etc/lighttpd/conf.d/30-fastcgi.conf
41.0K /etc/modules.d
414.5K /etc/ssl/certs
427.0K /etc/ssl
5.0K /etc/config/firewall
5.0K /etc/init.d/openvpn
5.5K /etc/hotplug.d/block
5.5K /etc/init.d/dnscrypt-proxy
5.5K /etc/init.d/uhttpd
5.5K /etc/rc.button
5.5K /etc/vpn.user
52.0K /etc/usb-mode.json
54.0K /etc/config
6.0K /etc/init.d/dropbear
6.0K /etc/init.d/gl_s2s
6.5K /etc/init.d/wireguard_server
61.0K /etc/openvpn/ovpn4
63.0K /etc/openvpn
7.0K /etc/nodogsplash/htdocs/splash.html
7.5K /etc/init.d/glqos
77.5K /etc/nodogsplash/htdocs/images/portal_login.png
8.5K /etc/ddns/services
8.5K /etc/gcom
81.5K /etc/nodogsplash/htdocs/images
9.0K /etc/hotplug.d/iface/21-mirrir_route
9.0K /etc/opkg/keys
9.5K /etc/init.d/startvpn
9.5K /etc/lighttpd/conf.d
90.0K /etc/nodogsplash
90.0K /etc/nodogsplash/htdocs
928.0K /etc/tertf/mac_vendor.db
930.0K /etc/tertf
root@GL-MT300N-V2:~#

Go to applications → plugins and you will be shown how much space left for you.

After install 3.201, you should have around 2MByte

applications → plugins: Free space: 3% (0 MB)
i had to uninstall nano (the one i installed previously), sms, smtp, and ppp packages to install luci.
the space now is with luci installed

However,
LuCI → System → Software: 11% (4432.2KB) & installed 284 packages
Powered by LuCI openwrt-19.07 branch (git-21.044.30835-34e0d65) / OpenWrt 19.07.7 r11306-c4a6851c72

what shall I believe to?

Q: is bind part of the distro?

  • bind-check 9.16.8-1 bind administration tools (named-checkconf and named-checkzone only)
  • bind-dig 9.16.8-1 bind DNS excavation tool
  • bind-dnssec 9.16.8-1 bind administration tools (dnssec-keygen, dnssec-settime and dnssec-signzone only)
  • bind-hos t9.16.8-1 bind simple DNS client
  • bind-libs 9.16.8-1 bind shared libraries
  • bind-nslookup 9.16.8-1 bind nslookup utility
  • bind-rndc 9.16.8-1 bind administration tools (rndc and rndc-confgen only)
  • bind-tools 9.16.8-1 bind administration tools (all)

I didn’t do a detailed comparison, but many of my files have different sizes. Some more, some less. I have some you don’t. I would be bothered by the different sizes.

It might be nice to get rid of some of these packages, or have them installed if needed. I don’t need a captive portal, for example,so dumping nodogsplash would save a little bit. I wonder if we could dispense with the MAC database, too.

i wonder if that is safe to remove, too, please?

I totally agree with making the MAC database optional. It is taking up almost a megabyte which if it was an option, would give us almost 50% more free space, going from 2MB available to about 3MB.

1 Like

All right, can we say with authority the MAC database can be removed?

I think the mac database is used for exactly what you expect, attaching a vendor name to a mac. The tertf directory I think is used by gl-tertf for monitoring client traffic; gl-tertf is started in etc/init.d.

  • I reset the Mango to factory defaults, set up its wifi, then connected to the local wifi. Applications|Plugins reported 19%/2MB free space.
  • I installed LUcI; now 14%/2MB free.
  • I opened luci|System|Software, which reported 59%/2.4MB free.
  • using ssh, I removed /etc/tertf/mac_vendor.db, and then /etc/init.d/gl-tertf and rebooted.
  • Back In luci|System|software i now had 73%/2.9MB free. I uninstalled gl-tertf, which left me with 72%/2.9MB free (?). It looks like this tried to uninstall /etc/init.d/gl-tertf, so I didn’t need to have done that. It also looks like it uninstalled the sqlite library.
  • I installed adblock, sqm, nano, htop. This brought me to 57%/2.3MB free
  • I installed sqlite, which brought me to 40%/1.6MB free.
    Rebooted. We’ll see now.
1 Like

can we compare, please?

root@GL-MT300N-V2:/# du -cshd 1
464.0K  ./bin
0       ./dev
2.0M    ./etc
6.3M    ./lib
0       ./mnt
6.3M    ./overlay
30.4M   ./rom
512     ./root
491.5K  ./sbin
0       ./sys
1.1M    ./tmp
18.9M   ./usr
6.6M    ./www
72.7M   .
72.7M   total
root@GL-MT300N-V2:/#

and what size exactly is being reported by those %%?

The Luci percentages all compute out to a percentage of 4MB, which would be around the 3.6M mounted as /overlay, left over from from the 16M flash memory not used by the firmware. I think the GL GUI might be reporting it as a percent of the entire flash memory.

If I do df -h, I have 10.5M used and 0 available in /dev/root, mounted as /rom, and 1.5M available of 3.8M in /dev/mtdblock6, mounted as /overlay.

Not sure how you have 6.3M in overlay, which implies more than 16M flash.

$ ssh root@192.168.x.x
root@192.168.x.x's password:

BusyBox v1.30.1 () built-in shell (ash)
  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------
 OpenWrt 19.07.7, r11306-c4a6851c72
 -----------------------------------------------------
root@GL-MT300N-V2:~# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root                10.5M     10.5M         0 100% /rom
tmpfs                    60.8M      1.1M     59.6M   2% /tmp
/dev/mtdblock6            3.8M      3.3M    440.0K  89% /overlay
overlayfs:/overlay        3.8M      3.3M    440.0K  89% /
tmpfs                   512.0K         0    512.0K   0% /dev

root@GL-MT300N-V2:~# du /overlay -cshd 2
1.1M    /overlay/upper/etc
512     /overlay/upper/root
4.4M    /overlay/upper/usr
27.0K   /overlay/upper/lib
735.0K  /overlay/upper/www
33.5K   /overlay/upper/sbin
6.3M    /overlay/upper
0       /overlay/work/work
0       /overlay/work
6.3M    /overlay
6.3M    total

root@GL-MT300N-V2:~# du /overlay -cshd 3
0       /overlay/upper/etc/luci-uploads
1.0K    /overlay/upper/etc/samba
54.0K   /overlay/upper/etc/config
0       /overlay/upper/etc/lockdown
512     /overlay/upper/etc/sysctl.d
1.0K    /overlay/upper/etc/hotplug.d
0       /overlay/upper/etc/ppp
63.0K   /overlay/upper/etc/openvpn
7.5K    /overlay/upper/etc/init.d
512     /overlay/upper/etc/route_policy
1.5K    /overlay/upper/etc/rc.d
7.5K    /overlay/upper/etc/gcom
2.5K    /overlay/upper/etc/lighttpd
1.0K    /overlay/upper/etc/chatscripts
1.0K    /overlay/upper/etc/dropbear
930.0K  /overlay/upper/etc/tertf
4.0K    /overlay/upper/etc/wireless
0       /overlay/upper/etc/modules.d
7.0K    /overlay/upper/etc/opkg
0       /overlay/upper/etc/uci-defaults
0       /overlay/upper/etc/backup
0       /overlay/upper/etc/ssmtp
1.1M    /overlay/upper/etc
[...]
119.5K  /overlay/upper/usr/libexec
36.5K   /overlay/upper/usr/share
3.7M    /overlay/upper/usr/lib
275.0K  /overlay/upper/usr/sbin
284.5K  /overlay/upper/usr/bin
4.4M    /overlay/upper/usr
[...]
6.3M    /overlay/upper
6.3M    /overlay
6.3M    total

root@GL-MT300N-V2:~# ls -al /overlay/upper/usr/lib
drwxr-xr-x    7 root     root             0 Feb 15 15:22 .
drwxr-xr-x    7 root     root             0 Feb 15 15:22 ..
drwxr-xr-x    2 root     root             0 Apr 16 21:47 gl
lrwxrwxrwx    1 root     root            20 Apr 14 17:10 libbind9.so -> libbind9.so.1600.0.5
lrwxrwxrwx    1 root     root            20 Apr 14 17:10 libbind9.so.1600 -> libbind9.so.1600.0.5
-rwxr-xr-x    1 root     root         66007 Feb 15 15:22 libbind9.so.1600.0.5
lrwxrwxrwx    1 root     root            18 Apr 14 17:10 libdns.so -> libdns.so.1608.0.0
lrwxrwxrwx    1 root     root            18 Apr 14 17:10 libdns.so.1608 -> libdns.so.1608.0.0
-rwxr-xr-x    1 root     root       1875651 Feb 15 15:22 libdns.so.1608.0.0
lrwxrwxrwx    1 root     root            13 Apr 14 17:11 libform.so.6 -> libformw.so.6
lrwxrwxrwx    1 root     root            15 Apr 14 17:11 libform.so.6.1 -> libformw.so.6.1
lrwxrwxrwx    1 root     root            15 Apr 14 17:11 libformw.so.6 -> libformw.so.6.1
-rwxr-xr-x    1 root     root         42091 Feb 15 15:22 libformw.so.6.1
c---------    1 root     root        0,   0 Apr 16 21:47 libglmodem.so
lrwxrwxrwx    1 root     root            18 Apr 14 17:11 libirs.so -> libirs.so.1601.0.0
lrwxrwxrwx    1 root     root            18 Apr 14 17:11 libirs.so.1601 -> libirs.so.1601.0.0
-rwxr-xr-x    1 root     root         33363 Feb 15 15:22 libirs.so.1601.0.0
lrwxrwxrwx    1 root     root            18 Apr 14 17:11 libisc.so -> libisc.so.1607.0.0
lrwxrwxrwx    1 root     root            18 Apr 14 17:11 libisc.so.1607 -> libisc.so.1607.0.0
-rwxr-xr-x    1 root     root        400659 Feb 15 15:22 libisc.so.1607.0.0
lrwxrwxrwx    1 root     root            20 Apr 14 17:11 libisccc.so -> libisccc.so.1600.0.2
lrwxrwxrwx    1 root     root            20 Apr 14 17:11 libisccc.so.1600 -> libisccc.so.1600.0.2
-rwxr-xr-x    1 root     root         29311 Feb 15 15:22 libisccc.so.1600.0.2
lrwxrwxrwx    1 root     root            21 Apr 14 17:11 libisccfg.so -> libisccfg.so.1601.0.0
lrwxrwxrwx    1 root     root            21 Apr 14 17:11 libisccfg.so.1601 -> libisccfg.so.1601.0.0
-rwxr-xr-x    1 root     root        125255 Feb 15 15:22 libisccfg.so.1601.0.0
-rw-r--r--    1 root     root        124375 Feb 15 15:22 liblua.so.5.1.5
lrwxrwxrwx    1 root     root            18 Apr 16 22:06 liblucihttp.so.0 -> liblucihttp.so.0.1
-rw-r--r--    1 root     root         12407 Feb 15 15:22 liblucihttp.so.0.1
lrwxrwxrwx    1 root     root            13 Apr 14 17:11 libmenu.so.6 -> libmenuw.so.6
lrwxrwxrwx    1 root     root            15 Apr 14 17:11 libmenu.so.6.1 -> libmenuw.so.6.1
lrwxrwxrwx    1 root     root            15 Apr 14 17:11 libmenuw.so.6 -> libmenuw.so.6.1
-rwxr-xr-x    1 root     root         20947 Feb 15 15:22 libmenuw.so.6.1
lrwxrwxrwx    1 root     root            16 Apr 14 17:11 libncurses.so.6 -> libncursesw.so.6
lrwxrwxrwx    1 root     root            18 Apr 14 17:11 libncurses.so.6.1 -> libncursesw.so.6.1
lrwxrwxrwx    1 root     root            18 Apr 14 17:11 libncursesw.so.6 -> libncursesw.so.6.1
-rwxr-xr-x    1 root     root        223655 Feb 15 15:22 libncursesw.so.6.1
lrwxrwxrwx    1 root     root            17 Apr 14 17:11 libns.so -> libns.so.1605.0.0
lrwxrwxrwx    1 root     root            17 Apr 14 17:11 libns.so.1605 -> libns.so.1605.0.0
-rwxr-xr-x    1 root     root        237135 Feb 15 15:22 libns.so.1605.0.0
lrwxrwxrwx    1 root     root            14 Apr 14 17:11 libpanel.so.6 -> libpanelw.so.6
lrwxrwxrwx    1 root     root            16 Apr 14 17:11 libpanel.so.6.1 -> libpanelw.so.6.1
lrwxrwxrwx    1 root     root            16 Apr 14 17:11 libpanelw.so.6 -> libpanelw.so.6.1
-rwxr-xr-x    1 root     root          8295 Feb 15 15:22 libpanelw.so.6.1
lrwxrwxrwx    1 root     root            10 Apr 14 17:10 libuv.so -> libuv.so.1
lrwxrwxrwx    1 root     root            14 Apr 14 17:10 libuv.so.1 -> libuv.so.1.0.0
-rw-r--r--    1 root     root        104163 Feb 15 15:22 libuv.so.1.0.0
drwxr-xr-x    4 root     root             0 Feb 15 15:22 lua
drwxr-xr-x    3 root     root             0 Feb 15 15:22 opkg
drwxr-xr-x    3 root     root             0 Feb 15 15:22 pppd
drwxr-xr-x    2 root     root             0 Apr 16 22:07 rpcd
root@GL-MT300N-V2:~# ls -al /overlay/upper/etc/tertf
drwxr-xr-x    2 root     root             0 Apr 27 09:42 .
drwxr-xr-x   24 root     root             0 Apr 26 23:47 ..
-rw-r--r--    1 root     root        950272 Feb 15 15:22 mac_vendor.db
-rw-r--r--    1 root     root          1606 Apr 27 09:42 tertfinfo_bak
root@GL-MT300N-V2:~#

OK, i figured - bind utility took the extra space. would be still great if the frm upgrade would check the space and advise.

I realize this is an old thread, but I’m having a similar problem.
Brand new X750V2 w/ 16Mb of flash memory.
Came with 3.201 installed.
I haven’t done an upgrade or added anything.
When I attempt to install Luci, a get the “Not Enough Flash Space” message.

I’m think you need read this thread link