Questions tagged [ipc]
The ipc tag has no usage guidance.
19
questions
6
votes
2
answers
13k
views
What are the semaphore arrays on Linux?
I understand semaphores, but what are these semaphore arrays being used on my Linux box?
$ ipcs
------ Shared Memory Segments --------
key shmid owner perms bytes nattch ...
- 435
6
votes
2
answers
611
views
How to remove a "door" in solaris
I have a file of type "door" in solaris 10 (that is a means of interprocess communication). It is somehow left over and I would like to get rid of it. I can not just remove it with rm ...
ls -l
total ...
- 1,215
4
votes
1
answer
10k
views
Windows tries to access the IPC$ share before the provided one
I have a samba server where I have disabled access to the IPC$ share [1] for security reasons (users and shares enumeration, user info query, ...).
I can access the data shares on this server without ...
- 133
3
votes
2
answers
699
views
Munin mysql plugins results inconsistent, with IPC::Sharelite store() error: Identifier removed
I've recently setup a munin-node on a CentOS server. All was working fine until I tried to add the apache plugin (which works fine).
For some odd reason, the mysql plugins for munin that used to work ...
- 163
3
votes
1
answer
3k
views
How to see nginx's shared memory usage
I'm investingating nginx's cache mechanism. I set the following in my nginx.conf.
fastcgi_cache_path /run/nginx-cache levels=1:2 keys_zone=PHP_CACHE:4m inactive=5m max_size=1m;
By keys_zone=...
- 63
2
votes
1
answer
1k
views
Centos System V IPC message queue limits
[Although I'm working in perl I believe that this question relate to Linux System V IPC
APIs and limits rather that the anything perl-specific.]
I have two Centos machines, each at CentOS Linux ...
- 325
2
votes
1
answer
5k
views
Permission needed for Named pipes on Windows 2008
Are there any special permissions needed for domain service account running a windows service which receives messages over named pipes? Hosting environment is Windows Server 2008.
Background:
We ...
- 227
1
vote
1
answer
1k
views
Does information piped through a Unix socket touch disk?
I'm trying to understand how fast different IPC mechanisms are, and I know it's possible to create a Unix Socket as a "file" in a directory on a filesystem, but what I don't understand is ...
1
vote
1
answer
2k
views
Simpliest unix non-blocking "broadcast" socket
I have non-regularly running program which outputs string, I need to send this output to some kind of socket which can be distributed out of docker container and which can be listened by multiple ...
- 121
1
vote
2
answers
4k
views
Windows 7 uses always IPC$ as path when connecting to a samba share
I have a smb share : \mysmb\www
When connection from Windows XP all runs fine. When connecting from Windows 7 I got an error like 'wrong password'.
In smbd log I can see :
Invalid username/...
- 11
1
vote
1
answer
2k
views
How can I get Certbot to run after unresponsive login session?
A login session (under Jessie) running certbot -d example.com -d www.example.com froze, and when I tried to run Let's Encrypt's certbot from another session, it said, "Another instance of Certbot is ...
- 1,162
1
vote
3
answers
764
views
Unix domain socket firewall
I've got a problem with my debian server.
Probably there is some vulnerable script at my web-serser, which is running from www-data user.
I also have samba with winbind installed, and samba is joined ...
- 11
0
votes
1
answer
4k
views
How to get PIDs waiting on a semaphore
If I strace a stuck process and see output of the form:
[gaius@redhat64 bin]$ strace -p 18185
Process 18185 attached - interrupt to quit
[ Process PID=18185 runs in 32 bit mode. ]
semop(458760, ...
- 1,511
0
votes
1
answer
82
views
Fail2ban only works with log files? [closed]
What about Unix sockets? I have created my own server application that needs protection.
My two options:
Creating a log file for fail2ban to watch
Establish networking between my server application ...
- 3
0
votes
0
answers
472
views
Ubuntu 20.04 / 22.04 - Remote ssh or rsync killing all process from user
I got a weird strange odd behavior (there's not enough adjectives for that) on Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
This is a IBM Db2 test server. The server runs a Db2 service under db2inst1 user ...
- 115
0
votes
1
answer
562
views
Google compute engine UDP service only accessible from external IPs
I have a small and simple UDP server that's been working in several hosting places for years.
I just created a new vm in the google cloud, a Compute Engine, with linux.
Default settings for a small ...
google-compute-engine
0
votes
1
answer
338
views
Symantec Backup Exec and connecting to IPC shares?
I am hoping to be able to have Symantec Backup Exec (2010) connect to some Windows machines via their IPC shares for backup.
It seems to work for a couple machines I tried, but several others it's ...
- 1,882
0
votes
1
answer
82
views
Logging events from a remote machine
I have a setup where a process logs the current of the outlet of a power distribution unit (it's a Schleifenbauer PDU and a gateway). It polls continuously the values and writes them to a file with ...
- 101
-1
votes
1
answer
1k
views
How does Apache spool STDOUT from a CGI script?
As part of a content management system I'm developing I have a script which retrieves image files (JPEG, GIF, PNG etc) in response to the browser GETing a URL like http://myserver/getimage.cgi/virtual/...
- 280
Related Tags
linux × 6
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redhat × 1
rsync × 1
solaris × 1
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