In /logs/firmware/unblob_extracted/firmware_extract/1568982-13971496.squashfs_v4_le_extract/etc/init.d/system line 4:

START=10

^---^ SC2034 (warning): START appears unused. Verify use (or export if used externally).

In /logs/firmware/unblob_extracted/firmware_extract/1568982-13971496.squashfs_v4_le_extract/etc/init.d/system line 5:

USE_PROCD=1

^-------^ SC2034 (warning): USE_PROCD appears unused. Verify use (or export if used externally).

In /logs/firmware/unblob_extracted/firmware_extract/1568982-13971496.squashfs_v4_le_extract/etc/init.d/system line 23:

	echo "$hostname" > /proc/sys/kernel/hostname

              ^-------^ SC2154 (warning): hostname is referenced but not assigned.

In /logs/firmware/unblob_extracted/firmware_extract/1568982-13971496.squashfs_v4_le_extract/etc/init.d/system line 24:

	[ -z "$conloglevel" -a -z "$buffersize" ] || dmesg ${conloglevel:+-n $conloglevel} ${buffersize:+-s $buffersize}

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

In /logs/firmware/unblob_extracted/firmware_extract/1568982-13971496.squashfs_v4_le_extract/etc/init.d/system line 25:

	echo "$timezone" > /tmp/TZ

              ^-------^ SC2154 (warning): timezone is referenced but not assigned.

For more information:

  https://www.shellcheck.net/wiki/SC2034 -- START appears unused. Verify use ...

  https://www.shellcheck.net/wiki/SC2154 -- hostname is referenced but not as...

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