I have a bunch of CentOS computers for which I would like to change the smb.conf to either enable client max protocol = SMB2 by uncommenting it or by adding it in of it doesn't exist under the [global] section.
Is there any way to script this? Its quite a couple computers that this change will have to be executed on and I'd like to pair it with another bash script so this maintenance doesn't take too much time.
Thanks in advance.
Related
Background:
I have a 128-core server which I would like to use as a build server.
I have a bunch of client machines which work with a not-so-new and not-so-powerful PC. (Can't upgrade! Not in my control.)
What I did:
I followed the distcc documentation.
And installed a virtual machine on the server with exactly the same compiler version, the same distcc version -- basically the same distribution, as on the client-machines.
After configuring the clients and the servers, I can remotely build. I can verify this using the distccmon-text tool. I can see on the server, there are 8 threads started by the distcc daemon and that are awaiting for build-jobs to come. This was good as a first step. You can see the output below to be sure.
Second Step: Since the client machines are dual-core machines while the server offers 128-cores, and not all clients will be compiling at the same time, I wanted to offload as much of the build as possible to the build-server.
Problems:
First Problem: distcc, no matter how I try to configure it, always tries to distribute the build-jobs equally on the client and the server. Even though my configuration file looks as shown below:
# --- /etc/distcc/hosts -----------------------
# See the "Hosts Specification" section of
# "man distcc" for the format of this file.
#
# By default, just test that it works in loopback mode.
# 127.0.0.1
172.24.26.208/8,cpp,lzo
localhost/0
Which as per the distcc documentation should give higher priority to the build-server and lower-priority to the localhost since it comes later in the list. Also, it should give 8 jobs to the build server and 0 jobs to the localhost. But no, that doesn't happen. Upon typing make -j8 what it tries to do is start 4 threads on localhost and 4 on remote. Not good. This you can see from the image below.
Second Problem: What you would also notice is that the pre-processing is being done on the localmachine. For this there is a tool that comes with distcc. It is called the "distcc-pump" or the pump mode and can be used like this.
time pump make CC="distcc gcc" CXX="distcc g++" -j8
Unfortunately, pump mode or not, the pre-processing happens to be happening all on the localhost, as you can see from the above image. Sad.
Note: At no point does the distcc program, with the configurations I listed here, throw any errors nor warnings, neither on the server nor on the clients.
Versions:
gcc 4.4.5
distcc 3.2rc1.2
(Before someone suggests - "upgrade software!", newer versions are most likely not possible for me. Anyways, this version of distcc offers the features that I need. Also, I can upgrade the server virtual-machine but then there would be compiler version mistmatch between clients and the server. The clients I cannot upgrade.)
Any suggestions, feedback on how to improve this setup/(fix the problems) are most welcome.
EDIT : these solutions do not work, I let the answer to avoid someone else to propose again them
Try by
removing the line concerning the localhost in /etc/distcc/hosts c.f. https://superuser.com/questions/568133/force-most-compilation-to-a-remote-host-with-distcc
or may be specifying 127.0.0.1 rather than localhost in /etc/distcc/hosts c.f. an other problem solved with that substitution in https://distcc.github.io/faq.html
distcc actually differentiates between remote and local CPUs. But contrary to your interpretation, in the hosts file the IP address 127.0.0.1 is considered as a remote CPU and a distccd server is expected to be running there. Any number of jobs you define in the hosts file is interpreted only for these server nodes.
According to the man page, "localhost" is interpreted specially. This is what seems to not work for you. An alternative syntax is --localslots=<int>. Have you tested this?
Additionally, distcc runs jobs on the local host (the one where you start the driver program). First, all linking is done there. Second, when you specify a certain parallelism with make -jN, all jobs exceeding the available number of remote jobs are run on your local host, too - in addition to the workload distribution part of distcc. The option --localslots limits these. The man page does not mention localhost explicitly here. And then there are those jobs, which fail on the server and are repeated locally.
For the given 128-core server I would use the number of cores in the hosts file and start only that number of compile jobs:
$ cat ~/.distcc/hosts
172.24.26.208/128,cpp,lzo
$ make -j 128
...
Then I would expect to not see any compile jobs on the local machine.
The man page has some more words regarding recommended job numbers. Search for the section(s) starting with distcc spreads the jobs across both local and remote CPUs.
I'm experimenting with reverse shell tcp. I managed to establish a connection, but my question is, how do I mantain a connection even after I close the multihandler? And when I'm using the target's command prompt, how do I send files to the target's computer using his command prompt?
Pedro,
The short answer is you can't.
In order to maintain a connection you need to install persistence on
the victim machine. You will still have to reuse the multi/handler in
order to receive a new connection.
In order to transfer files you need to use the meterpreter payload in
order to upload and download files.
However, if you have powershell on your target machine you can run a
powershell download that will fetch internet hosted resources for
you.
Hope this helped.
I was wondering if someone could help me.
I have started using version control (git) for my website which is using CodeIgniter.
Everytime i transfer files from my localhost host to my live server, i always have to go through all my files and change the config details.
I came across a post saying i could do all this with the ENVIRONMENT settings in the index.php file automatically based on the SERVER_NAME.
Has anybody done this before? if so, would it be possible to let me know how its done properly?
Cheers,
Try this for a start (index.php):
if ($_SERVER["HTTP_HOST"] == 'devserver1' || $_SERVER["HTTP_HOST"] == 'devserver2')
define('ENVIRONMENT', 'development');
else
define('ENVIRONMENT', 'production');
Then, whenever you need it, you check for the ENVIRONMENT constant (for example, different database settings, etc.). For localhost, simply check if the server is 'localhost' ($_SERVER["HTTP_HOST"] == 'localhost'), or whichever virtual host name you might be using.
You could always use environment variables
http://httpd.apache.org/docs/2.2/env.html
This will allow you to get the environment instead of hard coding the information in your code
This may also help you out
http://docstore.mik.ua/orelly/linux/apache/ch04_06.htm
Not sure if you're still needing help with this, but I had this issue a while ago and released a CodeIgniter module which is designed to automatically handle multiple environments.
I'm shameful to be plugging myself, but it's saved me lots of editing and it might be of use to anyone else that'll read this post in the future.
Here's the link to the Git repo: https://github.com/jedkirby/ci-multi-environments and this is a brief explanation of why and how I made the module: http://jedkirby.com/blog/2012/11/codeigniter-multiple-development-environments
I'm trying to keep a file updated real time with the server. Its more like a real time syncing which has a very small delay. Is there any application that lets me do this? Or would you suggest me using a local host as a server?
I dont know how you are connected to your server - but i assume this will be something like SCP / SFTP / FTP and i dont know your OS. WinSCP will do excatly this what you need, you can set it to watch your Filesystem (to a specified folder) and it will update the server files as soon as your file on your drive changes.
It also supports command line features so that you can use it within your own applications.
At work I have to connect to our server every day. After becoming annoyed with having to use the GUI Connect to Server every day, I wrote a quick script (using mount) that does the same thing.
When I use Connect to Server, however, a link to the mounted server appears in the side panel of the File Manager, which I use all the time. How do I add this link from a terminal/shell script?
(Or even better, where can I find the code for the Connect to Server program?)
Thanks in advance.
You want to use gvfs-mount rather than mount
See the discussion here: http://www.g-loaded.eu/2008/12/08/access-gvfs-mounts-from-the-command-line/