List of Command-Line Tools - Data Science at the Command Line - page 171

drake
Manage a data workflow. Drake (version 0.1.6) by Factual (2014). https://github.com/
Factual/drake .
$ # Please see Chapter 6 for installation instructions.
$ drake --help
dseq
Generate sequence of dates relative to today. Dseq by Jeroen H.M. Janssens (2014).
https://github.com/jeroenjanssens/data-science-at-the-command-line .
$ git clone https://github.com/jeroenjanssens/data-science-at-the-command-
line.git
$ dseq -2 0 # day before yesterday till today
2014-07-15
2014-07-16
2014-07-17
echo
Display a line of text. Echo (version 8.21) by Brian Fox and Chet Ramey (2012).
http://www.gnu.org/so ​ ware/coreutils .
$ sudo apt-get install coreutils
$ man echo
env
Run a program in a modified environment. It's often used to specify which interpreter
should run our script. Env (version 8.21) by Richard Mlynarik and David MacKenzie
(2012). http://www.gnu.org/so ​ ware/coreutils .
$ sudo apt-get install coreutils
$ man env
$ #!/usr/bin/env python
export
Set export attribute for shell variables. Useful for making shell variables available to
other command-line tools. Export is a Bash builtin.
$ help export
$ export WEKAPATH = $HOME /bin