In /logs/firmware/unblob_extracted/firmware_extract/DIR-600_fw_revb5_214b01_ALL_de_20130122/dir600b_v2.14_d1mg.bin_extract/1179788-3612812.squashfs_v4_le_extract/etc/events/WAN-1_dhcp_cb.sh line 2:

echo [$0] [$1] ... > /dev/console

      ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

           ^-- SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean:

echo ["$0"] ["$1"] ... > /dev/console

For more information:

  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...

[*] Source file WAN-1_dhcp_cb.sh