root@Natasha:~# opkg list-installed | grep [l]ight
lighttpd - 1.4.32-r3.18
lighttpd-module-access - 1.4.32-r3.18
lighttpd-module-accesslog - 1.4.32-r3.18
lighttpd-module-auth - 1.4.32-r3.18
lighttpd-module-cgi - 1.4.32-r3.18
lighttpd-module-dirlisting - 1.4.32-r3.18
lighttpd-module-expire - 1.4.32-r3.18
lighttpd-module-indexfile - 1.4.32-r3.18
lighttpd-module-staticfile - 1.4.32-r3.18

and

root@Natasha:~# opkg status lighttpd
Package: lighttpd
Version: 1.4.32-r3.18
Depends: lighttpd-module-dirlisting, libpcre1 (>= 8.33), lighttpd-module-auth, lighttpd-module-cgi, lighttpd-module-expire, lighttpd-module-access, libc6 (>= 2.18), lighttpd-module-staticfile, lighttpd-module-indexfile, lighttpd-module-accesslog
Recommends: update-rc.d
Provides: lighttpd-systemd
Replaces: lighttpd-systemd
Conflicts: lighttpd-systemd
Status: install user installed
Architecture: armv7ahf-vfp-neon
Conffiles:
 /etc/lighttpd.conf a7a5b79321fbb063fe2aad1fa350ffe1
Installed-Time: 1468402192

How can I flash a firmware through SSH ?