mount.nfs: access denied by server while mounting in Ubuntu Machine?

Question

Find the total number of visits of the bird Cranes?

Program:

import pandas as pd
import numpy as np

df = pd.DataFrame({'birds': ['Cranes', 'Cranes', 'plovers', 'spoonbills', 'spoonbills', 'Cranes', 'plovers', 'Cranes', 'spoonbills', 'spoonbills'], 'age': [3.5, 4, 1.5, np.nan, 6, 3, 5.5, np.nan, 8, 4], 'visits': [2, 4, 3, 4, 3, 4, 2, 2, 3, 2], 'priority': ['yes', 'yes', 'no', 'yes', 'no', 'no', 'no', 'yes', 'no', 'no']})

g=df.groupby(['birds','visits']).sum()
g

OUTPUT:

        age
birds   visits  
Cranes     2    3.5
           4    7.0
plovers    2    5.5
           3    1.5
spoonbills 2    4.0
           3    14.0
           4    0.0

Desired Output:

birds   visits
Cranes    2
Cranes    4
Cranes    4
Cranes    2
Total    12

Also let me know how to remove the age column which is coming?

If i try using groupby also other columns are coming and the result is not clear

Solution

change your /etc/exports from

/opt/exhibitor/conf/     10.108.24.*(rw)

to

/opt/exhibitor/conf/     10.108.24.0/24(rw)

Comments

[Michael Hampton]

Check the logs on the NFS server for clues.

[AKIWEB]

@MichaelHampton: Thanks for suggestion. Can you tell me where I can find the logs for NFS? And also did my exports file looks good?

[AKIWEB]

And also, do we need to start something related with NFS? I just installed the NFS server like this sudo apt-get install nfs-common nfs-kernel-server and after that I didn't do anything..

[Koustav]

import pandas as pd import numpy as np df = pd.DataFrame({'birds': ['Cranes', 'Cranes', 'plovers', 'spoonbills', 'spoonbills', 'Cranes', 'plovers', 'Cranes', 'spoonbills', 'spoonbills'], 'age': [3.5, 4, 1.5, np.nan, 6, 3, 5.5, np.nan, 8, 4], 'visits': [2, 4, 3, 4, 3, 4, 2, 2, 3, 2], 'priority': ['yes', 'yes', 'no', 'yes', 'no', 'no', 'no', 'yes', 'no', 'no']}) g=df.groupby(['birds']).sum() g['visits']

[cs95]

You've actually asked two questions so I've posted two links for you to read. Also, groupby is quite far from what you need to do.

[cs95]

@jezrael It smelled like homework and they seem to have no idea what they are doing. Rather than answer it I would close it and direct them to links to read. Looks like we share different opinions on the matter, unfortunately...

[AKIWEB]

Thanks for suggestion. I have also tried from machineB as well and I got same error. Is there any way I can see the logs? If yes, then what's the path?

[AKIWEB]

And also did my exports file looks good? I have the same content in all the three machines.

[AKIWEB]

And also, do we need to start something related with NFS? I just installed the NFS server like this sudo apt-get install nfs-common nfs-kernel-server and after that I didn't do anything..

[AKIWEB]

Can you explain me what does second line mean here? And should I use this line /opt/exhibitor/conf/ 10.108.24.0/24(rw) in all the three machines /etc/exports?

[Danielle]

It means you advertise your nfs share to 10.108.24.0/24 network and allowing client from the same network to access the folder. You only use this line on your nfs server. So, if all the three machine are the nfs server, then you have to put in all the machine.

[AKIWEB]

Ok.. Now when I did this after making the change in export file root@machineB:/# sudo mount -t nfs 10.108.24.132:/opt/exhibitor/conf /opt/exhibitor/conf/ from machineB, it worked fine and I didn't got any error. But now how to check whether the mount got created properly or not?

[Danielle]

type 'mount' in terminal machineB, or you can create a file some file in machineA, if it is properly created you should be able to see the same in machineB

[AKIWEB]

Yup. It works fine. I created a file in machineA and I can see those files in machineB and machineC as well. Thanks for the help.. One last thing, as you can see in my question, I am not using fstab file here so whenever my machine gets restarted up, all the mount will be gone.. So I am not sure, in my case what I am supposed to add in fstab file. Any idea how that will work out?

[Lawrence]

samba is totally different to NFS. NFS doesn't require username / password as it works off the linux uid/gid

[Danielle]

you can put this line in your fstab "10.108.24.132:/opt/exhibitor/conf /opt/exhibitor/conf nfs auto 0 0"

[AKIWEB]

Ok.. I added the same exact line as you have mentioned. Now I am having very strange issue. I deleted that file from machineA and after deleting that file, I went back to machineB and machineC and I did ls, the whole system got hanged and even ctrl+c was not taking me out. So I close those machineB and machineC and opened again. And after that, I tried doing cd /opt/exhibitor/conf but it is getting hanged at cd /opt/exhibitor/c. Any idea what is causing the problem?

[AKIWEB]

let us continue this discussion in chat

[Koustav]

OUTPUT: birds Cranes 12 plovers 5 spoonbills 12 Name: visits, dtype: int64

[jezrael]

If need birds visits Cranes 2 Cranes 4 Cranes 4 Cranes 2 Total 12 like mentioned in question, it is not correct.

[Koustav]

It is to find the total no of Cranes,however i found the total no of all kinds of birds but not Cranes in particular. Please let me know how to find the sum of only Cranes row and also show if we want to create a new row Total and store the sum there.