Tathagata questions

• New subset by selecting rows based on values of a vector in R
• Standalone OSGi (Equinox) server on Eclipse Juno
• Wordnet synsets using perl
• Sed in place edit
• Programmatic access to Java documentation [closed]
• running bash pipe commands in background with & ampersand
• Create empty dataframe in R with same columns
• Keyboard shortcut for going onelevel up in midnight commander [mc]

Tathagata answers