I have a shared folder between my host machine and my VM that has been working smoothly, but I have run into problems when I tried to try to create a softlink to a folder on my host machine and share it.
On my host machine, I have the folder /local_data which I can access from my virtual machine as /media/sf_local_data. In /local_data on my host machine, I created a softlink to a python project located in /home/user/PycharmProjects/targetFolder using the command:
ln -s /home/user/PycharmProjects/targetFolder/ /local_data/targetFolder
which is visible using ls -l in my VirtualBox:
lrwxrwx--- 1 root vboxsf 40 Jun 18 11:49 SonarSetup -> /home/user/PycharmProjects/targetFolder/
but I can't copy or view anything inside.
I would like to be able to edit python code from my host machine and run it on my VM. I know, if nothing else works, I can move the whole folder over to /local_data but I would like to find out if I can get softlinks to work.
Related
this might be a dumb question, but I checked everywhere and there's no direct answer to it.
I set up both SSH keys successfully and I can connect to my instance via terminal, but when I do "ls", it doesn't show me any output. I am using iTerm2 with zsh on my Mac but I don't think this is an issue.
Can anybody give me a hint? Thanks!
When you access a VM through SSH, your working directory is the home directory of the user specified with the SSH command, i.e. /home/username. In case you access as root, the working directory will be /root.
You can check it through the command pwd
If it is a brand new machine, it is normal that the output of 'ls' is empty since in your home directory no file matches the filters of 'ls' with no parameters. The reason is that 'ls' doesn't show filenames starting with a dot ('.') because in the Linux convention they are hidden unless you run ls -al.
You can try again with $ ls -al and you will be able to see hidden files and directories as well.
On the other hand you can create as well first an empty file and then running again 'ls':
$ touch file
$ ls
Whenever I try to connect to VM using virsh console <vm name> my screen hangs and displays:
Connected to domain <vm name>
Escape character is ^]
I have found many solutions on the internet but nothing has worked for me and I am even not able to find the /etc/init directory as CentOS 7 has a different directory structure.
I need /etc/init directory to create a script which I found on the internet as a solution.
I am using only ssh connection and no GUI and I do not have any access to the physical machine.
I think you should start a console (e.g. ttyS0 ).
For example on my Debian 8 I enable it with systemd:
systemctl enable getty#tty1.service
Enable Serial Console on CentOS/RHEL 7
On the virtual machine, add ‘console=ttyS0‘ at the end of the kernel lines in the /boot/grub2/grub.cfg file:
grubby --update-kernel=ALL --args="console=ttyS0"
Note: Alternatively, you can edit the /etc/default/grub file, add console=ttyS0 to the GRUB_CMDLINE_LINUX variable and execute
grub2-mkconfig -o /boot/grub2/grub.cfg
GRUB_TERMINAL=serial
GRUB_SERIAL_COMMAND="serial –speed115200 –unit=0 –word=8 –parity=no –stop=1"
I had the same issue right after virt-install, then after trying to connect to the guest, too. I tried all the suggested solutions but none of them helped. Then I realized that I forgot to install KVM. A simple 'yum -y install kvm' resolved the issue.
I am unable to access the virtual box that I initialized with the "vagrant up" command. I now get this:
[C:\web\Homestead]vagrant global-status
id name provider state directory
------------------------------------------------------------------------
13650ef default virtualbox running C:/web/Homestead
The above shows information about all known Vagrant environments
on this machine. This data is cached and may not be completely
up-to-date. To interact with any of the machines, you can go to
that directory and run Vagrant, or you can use the ID directly
with Vagrant commands from any directory. For example:
"vagrant destroy 1a2b3c4d"
[C:\web\Homestead]vagrant ssh 13650ef
C:/web/Homestead/Vagrantfile:4: warning: already initialized constant
....
The provider 'virtualbox' that was requested to back the machine
'default' is reporting that it isn't usable on this system. The
reason is shown below:
The executable 'cygpath' Vagrant is trying to run was not
found in the %PATH% variable. This is an error. Please verify
this software is installed and on the path.
I am running Windows 10 and set my environment variables, as follows:
Path c:\php;C:\Program Files\Oracle\VirtualBox;
C:\Program Files\Git\usr\bin;C:\cygwin64;
C:\Users\Kevin\AppData\Roaming\npm
The cygpath file it seeks is clearly under both c:\Program Files\Git\usr\bin and under C:\cygwin64.
I tried to access the virtual box through Putty, but got the simple message "connection refused". I have used Puttygen to convert the ssh keys to Putty ppk files.
I have tried to retrace my steps initializing the virtual box, but I fail to see how to step forward and open the box.
Should I destroy my virtual box and start over?
Try to change the PATH paths with 'Program Files' to Progra~1 paths or to wrap each path item with double-quotes, e.g.:
Path c:\php;"C:\Program Files\Oracle\VirtualBox"; "C:\Program
Files\Git\usr\bin";C:\cygwin64; C:\Users\Kevin\AppData\Roaming\npm
or
Path c:\php;C:\Progra~1\Oracle\VirtualBox;
C:\Progra~1\Git\usr\bin;C:\cygwin64;
C:\Users\Kevin\AppData\Roaming\npm
I have setup an NFS file share between two CentOS 6, 64 machines. On the server the folder being shared was originally owned by the root user. On the client it turned up as being owned by nfsnobody. When I tried to write to the folder from the client I got a permissions error. So I changed the folder ownership on the server to nfsnobody and chmod'd it to 777. However, still no joy - I continue to get a permissions error. Clearly, there is more to this. I would be much obliged to any Linux gurus out there (I personally wouldn't merit being called anything more than a newbie) who might be able to help fix this issue.
Edit - I should have mentioned that trying to write to the shared folder from the client actually manages to create a file entry. However, the file size is 0 and the permissions error is reported.
The issue here is to do with the entry in /etc/exports. It should read
folder ip(rw,**all_squash**,sync,no_subtree_check)
I had missed the all_squash bit. That apart, make sure that the folder on the server is owned by nfsnobody. On my setup both my client and server nfsnobodies ended up with a user id if 65534. However, it is well worth checking this (/etc/groups) or else... .
Here are a couple of useful references
How to setup an NFS SErver
NFS on CentOS
For the benefit of anyone looking to setup an NFS server I give below what worked for me on my CentOS 6 64bit machines.
SERVER
yum install nfs-utils nfs-utils-lib - install NFS
rpm -q nfs-utils - check the install
/etc/init.d/rpcbind start
chkconfig --levels 235 nfs on
/etc/init.d/nfs start
chkconfig --level 35 rpcbind on
With this done you should create the folder you want to share
mkdir folder
chown 65534:65534 folder
chmod 755 folder
Now define the folder to be shared/exported. Use your favorite text editor (vi or whatever) to
open/create /etc/exports
folder clientIP (rw,all_squash,sync,no_subtree_check)
Client
Install, check, bind and start as above
mount -t nfs serverIP:folder clientFolderLocation
If all goes well you should now be able to write a little script on your client
<?php
$file = $_SERVER['DOCUMENT_ROOT']."/../nfsfolder/test.txt";
file_put_contents($file,'Hello world of NFS!');
?>
browse to it and find that test.txt now exists on the server with the content "Hello world of NFS". In the example I have placed my mounted drive one level before document_root.
I want to take backup of my website which is hosted on godaddy.
I used pscp command from my windows dos and try to download whole public_html folder.
my command is :
pscp -r user#host:public_html/ d:\sites\;
Files are downloading properly and folders also. But the issue is public_html and other subfolders has two folder like "./" and "../". Due to these two folders my copy is getting failed and I am getting
"security violation: remote host attempted to write to " a '.' or '..' path!"error.
Hope any one can help for this.
Note : I have only ssh access and have to download it from ssh commands itself.
Appending a star to the source should fix it, e.g.
pscp -r user#host:public_html/* d:\sites\;
Also you can do same thing by not adding '/' at the end of your source path.
For eg.
pscp -r user#host:public_html d:\sites
Above command will create public_html directory if not exists at your destination (i.e. d:\sites).
Simply we can say using above command we can make a as it is clone of public_html at d:\sites.
One important thing: You need to define the port number over here "-P 22".
pscp -r -P 22 user#host:public_html/* D:\sites
In my case, it works when I use port number 22 with the above script.