The installation of Parallel-SSH can be completed with a single command. Open a terminal window and issue the command: sudo apt-get install pssh Once the installation is complete, you're ready to go. Configure the commands Instead of running the necessary commands individually, we're going to create a single file that contains all of the command we want to run on our remote servers.
Issue the command: sudo nano /pssh-commands within that file, copy the following: #!/bin/bash echo # show system uptime uptime echo # show who is logged on and what they are doing who echo # show top 5 processes by RAM usage ps -eo cmd,pid,ppid,%mem,%cpu -sort=-%mem head -n 6 exit 0 Save and close that file. Note: You can add whatever commands you need in the above file (the above is an example).
Creating hosts file Next, we need to create a hosts file. Issue the command: nano /pssh-hosts In that file, the hosts will be listed, one per line (add as many as you need), in the form user@IP, like so: [email protected] [email protected] Save and close that file.
Bare install of Debian - on the task select screen don't pick anything but 'ssh server' and 'standard system utilities'. Will end up usign about 1gb and can be run in 128mb ram or perhaps less - but during install I'd use at least 256. Linux newbie here - I am building a music server and chose puppy over Windows 2000 (powers my current server). I used a small ECS industrial mobo with an on-board compact flash socket and loaded puppy from an iso image. It installed easily and recognized my wireless card, the on-board video, etc. So far so good.
Running Parallel-SSH Now we're going to run the command. We have our commands and hosts files ready, so issue the following command to use those files: parallel-ssh -h pssh-hosts -A -P -I. Output from our successful Parallel-SSH command. You can scroll through the output of the command to glean information about your servers. The caveat You knew the caveat was coming. One of the only problems you'll find with Parallel-SSH is its inability to run commands using sudo. This isn't a problem if you have a distribution that makes use of the root user, but even then you probably have the root user locked out of ssh login, so it's still becomes an issue.
In other words, you won't run commands like sudo apt-get upgrade with Parallel-SSH. That's fine, as you most likely wouldn't want to make use of a tool like this to run commands that require root or sudo privileges. Instead, you can create various command files that handle different tasks (such as gathering networking information, disk information, process information, etc.).
Even with this caveat, Parallel-SSH is still an incredibly useful tool.
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I have implemented something like this. I found no way to do it with a single listener. (Not to say it canot be done, but I did not find the way.) I created two sshdconfig files, one for port 22 set to allow sftp only, and one for a higher port that allowed full sshd services. I then created two startup scripts (in /etc/init.d at that time) one the standard oen that came with the package, and the other modified to start up using the alternate sshdconfig file. OpenSSH has come a LONG way since, so there may be a way to do this with a single listener now.
![Ssh server linux Ssh server linux](/uploads/1/2/5/3/125377274/488276678.jpg)
If researching the settings (check the MAN page for the latest release) and consider running two listeners as a fallback if you do not find what you need to make it work in a single instance. It's best to try to stay upstream as far as possible in regards to the sources of information, so in this case it means the manual pages for the various OpenSSH utilities and configuration files.
To get started for ideas of what to look for in the manual pages there are a lot of out there. However, one very large problem is the large body of legacy documents pointing people to nasty old FTP.
FTP is very difficult to set up, so there is a lot of discussion and a very large number guides for the search engines to find. So when people look for a way to upload files, they often get FTP recommended to them as if it is still the 1980's and end up burning a lot of resources setting it up and then more when the site gets compromised. It'd be nice to be able to find all those guides and discussions and prepend them with a big 'deprecated' warning and point to SFTP.
But I digress. SFTP is what is used in this case, and that is good. About this case, the two connection choices are SSH alone or SSH connecting to the SFTP subsystem. The recipe posted above is the latter plus a ForceCommand option to prevent using anything except the SFTP subsystem.
That's about as close as one can get to answering the question in #1 above. Match is pretty useful, though there are still some configurations (ciphers, macs, and key exchange algorithms for example) that are only one per server so an additional daemon and configuration file is needed for those cases. Of note, file as well lately. However, I still have mine set up per host or with a host pattern. Digging, I see that it was only when 'internal-sftp' was added.
That would put it around OpenBSD 4.3 which was from May 2008. Time flies, but, ok, maybe just ages ago and not ages and ages ago.
Code: 10 Klingons 2 starbases at 7,7, 6,6 It takes 250 units to kill a Klingon Short range sensor scan 0 1 2 3 4 5 6 7 8 9 0. 0 stardate 2500.00 1.
1 condition GREEN 2. 2 position 7,7/7,4 3. 3 warp factor 5.0 4. 4 total energy 5000 5. 5 torpedoes 10 6.
6 shields up, 100% 7. 7 Klingons left 10 8. 8 time left 14.00 9. 9 life support active 0 1 2 3 4 5 6 7 8 9 Starsystem Canopus V Command:. Hi, I have ssh and sftp requests coming to the server.
SSH is running currently on port x whereas sftp is receiving a request on port 22 and forwarding it to say port y. While connecting SSH on 22, the connection is establishing but failing at the time of providing username and password. I want to block port 22 completely for SSH. Didn't know if that possible but can you explain please why do you need it? If it's about brutforce attacks handle you can use. SSH at port 22 without any possibility to login shouldn't give you any problems except auth logs grow (where fail2ban can help again).