DB2 console mode does not support readline and autocomplete, this is a wrapper for the db2 command mode that adds support for both. It also tries to make using db2 a little bit more tolerable, adding support for interactive editing and psql-like meta commands and other shortcuts.

apt-get install rlwrap
gem install db2c

db2 => use testdb
db2(testdb) => current date
db2(testdb) => -107
db2(testdb) => history
db2(testdb) => select * from table.with.many.columns | less -S
db2(testdb) => edit
db2(testdb) => ls ~
db2(testdb) => irb
db2(testdb) => \l
db2(testdb) => \lt schema
db2(testdb) => \dv | grep -v SYS
db2(testdb) => \d schema.table
db2(testdb) => help

• Chris Jester-Young (CKY) found out the problem of using shell metacharacters when executing commands from Ruby.
• The initial script was inspired by defunkt's repl, for a genenral purpose repl/wrapper, this is your friend.
• Ben Ellis (benissimo) did all the beta testing

• rlwrap: http://utopia.knoware.nl/~hlub/rlwrap/
• Gem: http://rubygems.org/gems/db2c
• Help page: https://github.com/on-site/db2c/wiki/db2c-help