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/SEALPAC-LOAD.sh line 2:

dev=`xmldbc -g /runtime/devdata/lanpack`

    ^-- SC2006 (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean:

dev=$(xmldbc -g /runtime/devdata/lanpack)

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/SEALPAC-LOAD.sh line 3:

cd /var

^-----^ SC2164 (warning): Use 'cd ... || exit' or 'cd ... || return' in case cd fails.

Did you mean:

cd /var || exit

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/SEALPAC-LOAD.sh line 8:

seama -x sealpac.tgz -i $dev -m type=sealpac

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

Did you mean:

seama -x sealpac.tgz -i "$dev" -m type=sealpac

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/SEALPAC-LOAD.sh line 18:

	if [ -e sealpac -a -f sealpac/sealpac.slp ]; then

                        ^-- SC2166 (warning): Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.

For more information:

  https://www.shellcheck.net/wiki/SC2164 -- Use 'cd ... || exit' or 'cd ... |...

  https://www.shellcheck.net/wiki/SC2166 -- Prefer [ p ] && [ q ] as [ p -a q...

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

[*] Source file SEALPAC-LOAD.sh