Data Science Command Line Tools

Here, we are going to look at the most convenient and common Data Science Command tools for quick analysis of data.

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Data Science Tools

  • alias

It defines or display aliases. It is a Bash built in.

$ help alias
$ alias ll='ls -alF'
  • bash

GNU Bourne-Again SHell

$ sudo apt-get install bash
$ man bash
  • bc

It is used to evaluate equation from standard input

$ sudo apt-get install bc
$ man bc
$ echo 'e(1)' | bc -l
  • bigmler

Access BigML’s prediction API

$ sudo pip install bigmler
$ bigmler –help
  • cat

It concatenates files and standard input, and print on standard output.

$ sudo apt-get install coreutils
$ man cat
$ cat results-01 results-02 results-03 > results-all
  • cd

It changes the shell working directory. It is a Bash built in.

$ help cd
$ cd ~; pwd; cd ..; pwd

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  • chmod

It changes files mode bits. We use it to make our command-line tools executable.

$ sudo apt-get install coreutils
$ man chmod
$ chmod u+x
  • cowsay

It generates an ASCII picture of a cow with a message. Useful for when building up a particular pipeline is starting to frustrate you a bit too much.

$ sudo apt-get install cowsay
$ man cowsay
$ echo 'The command line is awesome!' | cowsay

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  • cp

Copy files and directories

$ sudo apt-get install coreutils
$ man cp
  • csvcut

Extract columns from CSV data

$ sudo pip install csvkit
$ csvcut –help
  • csvgrep

It filters tabular data to only those rows where certain columns contain a given value or match a regular expression.

$ sudo pip install csvkit
$ csvgrep –help
  • csvjoin

Merge two or more CSV tables together using a method analogous to a SQL JOIN operation.

$ sudo pip install csvkit
$ csvjoin –help

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  • csvlook

Renders a CSV file to the command line in a readable, fixed-width format

$ sudo pip install csvkit
$ csvlook --help
$ echo -e "a,b\n1,2\n3,4" | csvlook
  • csvsort

Sort CSV files

$ sudo pip install csvkit
$ csvsort –help
  • csvsql

Execute SQL queries directly on CSV data or insert CSV into a database

$ sudo pip install csvkit
$ csvsql –help
  • csvstack

Stack up the rows from multiple CSV files, optionally adding a grouping value to each row.

$ sudo pip install csvkit
$ csvstack –help

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  • csvstat

It prints descriptive statistics for all columns in a CSV file.

$ sudo pip install csvkit
$ csvstat –help
  • curl

Download data from a URL.

$ sudo apt-get install curl
$ man curl
  • cut

Remove sections from each line of files

$ sudo apt-get install coreutils
$ man cut
  • display

Display an image or image sequence on any X server. Can read image data from standard input

$ sudo apt-get install imagemagick
$ man display

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  • echo

Display a line of text.

$ sudo apt-get install coreutils
$ man echo
  • env

Run a program in a modified environment. It is used to specify which interpreter should run our script.

$ sudo apt-get install coreutils
$ man env
$ #!/usr/bin/env python
  • export

Set export attribute for shell variables. It is a Bash built in. It is useful for making shell variables available to other command-line tools.

$ help export
$ export WEKAPATH=$HOME/bin

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  • feedgnuplot

It generates a script for gnuplot while passing data to standard input.

$ sudo apt-get install feedgnuplot
$ man feedgnuplot
  • find

Search for files in a directory hierarchy

$ sudo apt-get install findutils
$ man find
  • grep

Print lines matching a pattern

$ sudo apt-get install grep
$ man grep
  • head

Output the first part of files

$ sudo apt-get install coreutils
$ man head
$ seq 5 | head -n 3
  • ls

List directory contents

$ sudo apt-get install coreutils
$ man ls
  • man

Read reference manuals of command-line tools

$ sudo apt-get install man
$ man man
$ man grep
  • mkdir

This command is used to make directories.

$ sudo apt-get install coreutils
$ man mkdir
  • mv

It is used to move or rename files and directories

$ sudo apt-get install coreutils
$ man mv
  • paste

It is used to merge lines of files

$ sudo apt-get install coreutils
$ man paste
  • pip

Install and manage Python packages

$ sudo apt-get install python-pip
$ man pip
  • pwd

Print name of current working directory

$ man pwd
$ pwd
  • python

It is used to execute Python, which is an interpreted, interactive, and object-oriented programming Language

$ sudo apt-get install python
$ man python

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  • R

Analyze data and create visualizations with the R programming language.

$ sudo apt-get install r-base-dev
$ man R
  • scp

It is used to Copy remote files securely

$ sudo apt-get install openssh-client
$ man scp
  • sort

Sort lines of text files

$ sudo apt-get install coreutils
$ man sort
  • split

Split a file into pieces

$ sudo apt-get install coreutils
$ man split
  • sql2csv

It executes arbitrary commands against an SQL database and outputs the results as a CSV

$ sudo pip install csvkit
$ sql2csv –help
  • ssh

Login to remote machines

$ sudo apt-get install ssh
$ man ssh
  • sudo

Execute a command as another user

$ sudo apt-get install sudo
$ man sudo
  • tar

Create, list, and extract TAR archives

$ sudo apt-get install tar
$ man tar
  • tee

Read from standard input and write to standard output and files

$ sudo apt-get install coreutils
$ man tee
  • tree

List contents of directories in a tree-like format

$ sudo apt-get install tree
$ man tree
  • type

Display the type of command-line tool. Type is a Bash built-in.

$ help type
$ type cd
  • unrar

Extract files from RAR archives

$ sudo apt-get install unrar-free
$ man unrar
  • unzip

List, test and extract compressed files in a ZIP archive

$ sudo apt-get install unzip
$ man unzip
  • wc

Print newline, word, and byte counts for each file

$ sudo apt-get install coreutils
$ man wc
$ echo 'hello world' | wc -c
  • which

Locate a command-line tool

$ man which
$ which man

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