All Questions
Tagged with filesystemsprocess
14 questions
2votes
1answer
74views
Mapping two users to host with user namespaces
I'm trying to understand whether it's possible to map two users from a user namespace to two different users on the host. The goal is to replicate the same permissions I have on my host inside a ...
-2votes
1answer
87views
Is the concept of file permission only applicable when access is via shell?
So in Linux we have a concept of file permission. There are three classes: user, group, and others, and there are three types of permissions: read, write, and execute. Now consider this. You are on a ...
- 224
1vote
2answers
440views
Is /proc/sys comparable to the Windows registry?
Does Linux's /proc/sys expose similar functionality to that of the Windows Registry or are they incomparable? From what I've seen, both allow the user to change various arcane system functions by ...
- 365
0votes
0answers
42views
figure read speed access to a file from a process
Background info for the request:: I have a radius server (freeradius running on Linux) that for each request needs to parse a long text file containing the allowed mac-address. From time to time, it ...
- 1,478
-1votes
2answers
854views
Why are process management files on Linux stored under /var/run?
Why are process management files on Linux stored under /var/run? For example: $ ls -ltr /var/run/ | grep pid -rw-r--r-- 1 root root 4 Mar 26 14:12 lvmetad.pid -rw-r--r-- 1 ...
- 13.9k
2votes
1answer
440views
How to find which mountpoint current working directory of a process correspond to?
I have a program a.out running from /tmp/test. If I list /proc/$(pgrep a.out)/cwd, it is a symbolic link to /tmp/test. Now, I bind /mnt/othertest onto /tmp/test with mount -o bind /mnt/othertest /tmp/...
- 516
4votes
2answers
870views
Make one program use a special resolv.conf
I want to cheat a program to use a special /etc/resolv.conf file, that in turn will force it to use a nonstandard nameserver. The obvious solution is to recreate the whole filesystem except one file ...
- 211
1vote
5answers
1kviews
Stop program from writing to a deleted file
One of our systems has a growing log file (we will be addressing) but currently the application owner will delete the file with rm then wait for the next maintenance window to reboot. I find myself ...
- 243
4votes
1answer
1kviews
Sort deleted (but still open) files by size
This gives you list of deleted files in your filesystem occupying space (as still open): find /proc/*/fd -ls 2>/dev/null | grep '(deleted)' However piping filenames of file descriptors return size ...
8votes
1answer
4kviews
In FUSE, how do I get the information about the user and the process that is trying to read/write in the virtual file system? [closed]
Say I created a FUSE filesystem called foo and mounted it at /mnt/foo. If I have a user called myuser that is running vi to open a file in /mnt/foo, what FUSE methods or data structure contains the ...
2votes
0answers
235views
Is there a way to give different permissions to different processes that are called from the same user?
I want to be able to have a r,w,x type permission given to specific processes and not to users. Any document I find shows that processes get the same permissions as the user calling it, but I want ...
6votes
1answer
822views
lsof misses files
Why does lsof fail to list files I have open. For example I open with the text editor some file in my home directory. $ gedit ~/.python_history lsof does not even work as root $ sudo lsof | grep ...
- 61
0votes
1answer
49views
Mechanism of multiple call for one script in the same time
I have the ruby script which is calling from different places in the same time(with defferent options). Is it safely and how this mechanism realized in linux? I mean what happens with file after ...
- 101
3votes
2answers
302views
How to detect out-bound port from PID
I have several applications that run on random ports. How would I take the pid or the file location and find which port it is running on? Example of desired output: www-data/apache = 80 my-awesome-...
- 31
