• echo - print arguments to stdout
• date - display current time
• cat - print files to stdout
• wget - download http content to a file
• gzcat - decompress and cat a gzipped file
• filehttp - a simple http server that serves files
• jsonpretty - a JSON pretty printer.
• du - count number of bytes of files
• digest - calculate cryptographic digest of data
• gensecret - generate cryptographically secured secret
• grep - regular expression search of lines