Get a list of all mounted file systems in Linux with python

Question

I am planning to automate a process of cleaning file systems in Linux using a set of scripts in Shell, Python and I'll create a simple dashboard using Node.js to allow a more visual approach.

I have a script in Shell which already cleans a file system in a specific server - but I have to login and then issue this command. Now I am proceeding with a dashboard in HTML/CSS/JS to visualize all servers which are having space problems.

My idea is: create a Python scrip to login and get a list of filesystems and its usage and update a single JSON file, then, my dashboard uses this JSON to feed the screen.

My question is how to get the list of file system in Linux and its usage?

Answer 1

To remote connect to a ssh and retrive a list with the filesystems and usage you can use paramiko SSH client and df command like this:

To install paramiko using pip issue:

sudo pip install paramiko

The regex module should be default installed

import paramiko, re

server = "your_server_ip_or_name"
username = "your_ssh_user"
password = "your_ssh_password"

ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(server, username=username, password=password)
ssh_stdin, ssh_stdout, ssh_stderr = ssh.exec_command("df")

filesystems = []
for line in ssh_stdout.readlines()[1:]:
    line = re.sub('\s+', ' ', line).strip()
    parameters = line.split(' ')
    usage_percent =  re.findall(r'\d+', parameters[4])
    filesystems.append({'name' : parameters[0], 'usage' : usage_percent[0]})

print filesystems

It will result in a list of dictionaries containing keys name, and usage like in this example:

[{'usage': u'17%', 'name': u'/dev/root'}, {'usage': u'0%', 'name': u'devtmpfs'}, {'usage': u'0%', 'name': u'tmpfs'}, {'usage': u'9%', 'name': u'tmpfs'}, {'usage': u'1%', 'name': u'tmpfs'}, {'usage': u'0%', 'name': u'tmpfs'}, {'usage': u'31%', 'name': u'/dev/mmcblk0p6'}, {'usage': u'0%', 'name': u'tmpfs'}]

Answer 2

You can use command

df

Provides an option to display sizes in Human Readable formats (eg, 1K 1M 1G) by using '-h'.This is the most common command but you can also check du and di . di in fact provides even more info than df .