when I was in / root / I made a mistake until a bash error occurred by finding more or less "bash error / bin / bash not file or directory" then many functions did not work. I then log out and when I access the vps again with ssh suddenly I can't log in with the password statement incorrectly. I tried to access via the console provided by the service provider. but when logging in, the word "login blablabla shell" appears. I can't do anything after that. how to fix it?
I want to try rebooting the vps but worry when booting error and causing stuck
This is more a question for 'Superuser', but if you are in trouble like this, such a referral is generally not helpful, and therefore this answer, which will not make you happy.
In general, what you have reduced to 'blablabla' is the important part of the error message.So we cannot deduce what happened from the error message. That means that no-one can get a login-shell. Even worse: most systems use bash-scripts during their start-up phase. So the system will not start-up anymore.
Worse even: you seem to have deleted much of the contents of /bin and /usr/bin. That makes it difficult to recover anything. So now your server is effectively unusable.
There are now a but few options:
1) Re-install the server. Because it is lost and you cannot access it anymore.
2) try to recover data. This depends a bit on your server provider. If you are able to boot off an ISO image, you may try a live-CD and scp the data to a working system before you reinstall the system. You may need console access for this, again depending on your provider's set-up
3) Try to re-animate the dead server using a recovery ISO image.
This is not for the faint of heart. It requires a lot of knowledge.
In any case: if you succeed to reanimate the server, you will not want to run production on it, unless it is absolutely critical. Although it might look stable-ish, you will encounter problems. So unless the one of the four horsemen prevents you, reinstall the server.
Related
So I'm working on a Chef cookbook for Windows, meaning it is generally executed on a Windows Server instance (2012r2 in this case). Specifically I am installing MSYS2 which uses Cygwin under the hood. I noticed that package installs were very slow and tracked down an article showing how the default nsswitch.conf in Cygwin uses the slower dynamic SAM/AD integration. For most users, and especially for my test environment this isn't needed so I tried following those steps to use only file-based users/groups. This resulted in a massive speedup (roughly 6x).
But there is a weirdness. It only works if I've logged in to the server via RDP at least once. Otherwise back to slows-ville.
Since this isn't hugely useful to automated testing, I've tried to figure out what exactly is causing the issue. The most likely candidate is that the first RDP connection (i.e. non-WinRM/headless session) is populating some piece of the user profile that headless sessions don't load, but I can't figure out what. I've tried calling LoadUserProfile, which is supposed to create a profile it doesn't exist, but this is not enough.
Any ideas on what piece of this I'm missing?
I keep getting this error:
Error 1061: The service cannot accept control messages at this time
This happens when I attempt to stop the service installed using InstallUtil from this location: C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
I am attempting to debug the windows service in question. My problem is that everytime I attempt to introduce changes to the codebase, the computer "A physical machine - Dell Precision T3500" requires that I restart the entire machine to completely uninstall the service, before I do a reinstall.
I have looked at this Link and it is not helpful in my scenario as I would first have to stop the service to be able to gain full access to the location where my build is generated to.
Whilst the service is attempting to restart before I do the restart of PC, when I attempt to build the service from my code, I get this interesting error from the compiler:
Error 16 Unable to copy file
"obj\x86\Debug\X_WindowsService.exe" to
"bin\x86\Debug\X_WindowsService.exe". The process cannot
access the file 'bin\x86\Debug\X_WindowsService.exe' because
it is being used by another process. X_WindowsService
Because of the error above I also think this is why I am not able to use the SO solution from here.
Does anyone have a clever idea for me to go through to bypass having to restart the machine as I debug and make changes to my codebase?
I also had a look at this link from SO but it has no marked solution, I also tried one of the Microsoft forums for a solution but it too has no applicable solution as they recommend the restart which I am trying to avert.
I feel so silly after finding this solution. I should most certainly have used the KISS principle for this one.
Turns out, all I had to do was look for the service's process from task manager and simply end the task. After that a refresh to my services list shows the service status as blank, meaning it has completely stopped without a restart of the machine.
I'm building a online code checker software.
I'm building a code checker, at times the user may submit code which is harmful for the server or it may even destroy the server, how will you put check on the users code and save your server?
If you're running linux or unix variants, you can use chroot to run the code in a limited environment. Also, run processes with appropriate permissions. I would also recommend an outbound iptables firewall so any code can't get out to the internet and potentially download hacker-packs. The code might still be able to destroy the contents of the chroot, but won't be able to access the system outside.
Bear in mind, Apache in a chroot environment is tricky, especially if you need access to system libs or general functionality.
UPDATE: I saw that someone was trying to use PyCharm with SSHFS and JetBrains said: "no". Perhaps this just won't work?
I'm trying to work with WebStorm on an SSHFS mounted disk at a client's office I'm working at — I've never used SSHFS before. I am using OSX 10.9.2, installed SSHFS thru home-brew and installed OSXFUSE.
The SSHFS mount dismounts periodically in any case, but since I started trying to use WebStorm with it it dismounts every time I start WebStorm and it starts scanning the files on the SSHFS disk — WebStorm gives the message "external file changes sync may be slow: Project files cannot be watched (are they under network mount?)" and if I try to open files it freezes. The SSHFS disc meanwhile has been dismounted. If I remount via terminal WebStorm isn't happy and either freezes or just sits there.
I set up the WebStorm project using "New project from existing files" — is there a way to set it up using SSHFS as a server? Beyond the login and password to the SSHFS disc I don't have any other server-specific info, but perhaps could get it.
Thanks for any help —
This is how I operate, and maybe it can help you. If there's a config setting I seem to have glossed over, just ask and I'll fix this up. But all in all, this is wonderfully successful:
My build environment is tucked away on a Linux distro, but my development environment is co-located on a Mac Desktop (when I'm at work) and a Mac Air (when I'm at home). My projects are enormous, and contractually I can't move the code to any machine where it might be accessible if my laptop is stolen. So I pretty much have to use ssh (and sshfs) to get anything done.
When I am at home, and I sit down to work, I manually initiate the VPN -- since there are so many variations, I'll assume you know how to do this part.
I open a terminal and invoke:
caffeinate &
because I hate getting disconnected whenever the computer goes into screen saver. This may be why you get disconnected? I leave this terminal open whenever I'm developing. I also use tmux so that my terminal session can be shared between computers. Anyway...
I set up a mount point set up between the server and the client. I have a script that I run when the mount point goes down (customize for your own work):
umount -f /Volumes/$MOUNTDIR/
umount -f /Users/$HOMEUSER/$MOUNTDIR
mkdir /Users/$HOMEUSER/$MOUNTDIR
sshfs $HOMEUSER##SERVERADDR:/usr/$HOMEUSER/$MOUNTDIR /Users/$HOMEUSER/$MOUNTDIR
I then launch Webstorm, PyCharm, ADS, IntelliJ (I'm a Jetbrains fan).
At this point you can open the directory within $MOUNTDIR and start working. If you find that you need to run builds, here's a tip -- do not build locally. Instead use SSH to issue the build commands (or run scripts) on the server. The overhead of synching after the build has run is most likely far less than fetching and writing all of the steps of the build.
I only find I get disconnected if I lose the VPN. I used to get disconnected whenever the computer would sleep. Caffeinate fixed that.
For reasonable sized projects, this is probably all you need. So what follows is an optimization -- only do it if you are having headaches:
To speed up load times, what I do is create a local project that is not part of the mount. There is a .IDEA directory that gets created and written to a lot at the base of the first directory you open as a project. Inside of this directory are lots of files that get written to a lot, and depending on your network speed, it might cause grief. It does mean some settings have to be maintained everywhere you go, but in my case it's a small price to pay for big performance gains.
So because I do this, I'll have to manually add directories to my project (Under Preferences/Directories). But if you work with huge APIs, you might be doing this anyway. I am careful to mark directories I don't need to reference as 'excluded', to make life easier on the indexer. I work in a shared directory structure with thousands of other employees, and I make sure the streams don't cross.
Now I have many many thousands of files, and it is true that sync can be slow. But sync is only triggered when you leave the app and come back in. And honestly, it's not that terrible, so long as you have a reasonable internet connection.
I hope this helps. Once I started using this as my workflow, I never went back.
The title says it. I'm looking for a way to determine exactly which file/registry key this executable is attempting to access. I have attempted to use Windows auditing capabilities and Process Monitor to determine where the failure is happening but, this failure does not produce audit failure events or show as access denial in Process Monitor.
Of course, If someone has experienced this and can provide a solution to resolve the error directly that would be almost as nice.
Background:
I am using moveuser.exe which is part of the Windows Server 2003 Resource Kit Tools to convert the security of local user profiles on a number Windows XP workstations.
Symptom:
Occasionally, moveuser.exe will fail to convert the security of a profile with the error "Error: 5 access denied". I have not been able to determine any commonality among the failing accounts or the computers they reside upon. A given computer may have host 6 profiles, 5 of which convert without issue and 1 which produces the error.
There are a few factors that I'm as sure as I can be about:
-The account I'm using to run moveuser.exe with has full Administrator rights to the local machine and the domain to which the profile security is being converted.
-The failure is not related to file permissions within the profile directory (the entire directory can be moved, renamed, deleted, or successfully converted via a workaround).
I've developed a reliable workaround for these cases but, it is fairly involved and I would much rather understand the root cause of this error and correct it pre-emptively.
My workaround (glad to share it, left out for brevity) seems to indicate that the failure is related to HKEY_LOCAL_MACHINE \ SOFTWARE\ Microsoft\ Windows NT \ CurrentVersion \ ProfileList registry keys but, I cannot determine exactly how/why.
Did you try to use the "regini" command line tool to grab registry permissions for the administrator account?
Use FileMon and RegMon (now Microsoft, formerly SysInternals, still free) to monitor what exactly is being accessed, how, and what rights/access are being requested.
I don't have a URL handy, but a Google search should be able to hook you up with these tools.
A couple items I would try. First, could it be that the user was logged in and the computer hasn't been rebooted. Microsoft has a product called UPHClent which helps in unloading unneeded user hives.
Next thing I wanted to know, is if you try rebooting before running the moveuser executable. This Conversation seems to indicate this would help with this kind of error.
Two days after posting this I got to the bottom of the problem. It turned out, just as Rob Haupt suggested to be related to a stuck user hive. The program I was running, moveuser, was reading the Refcount key found under HKEY_LOCAL_MACHINE\ SOFTWARE\ Microsoft\ Windows NT\ CurrentVersion\ ProfileList\ <SID>\ and ending immediately.
Setting Refcount to 0 solved the problem immediately
Pushing out UPHClean to all the target machines pre-emptively has all but elimated the problem and we were able to successfully convert profiles on several hundred machines over the last week.
An important note about UPHClean:
I'd tried installing it previously but, it didn't appear to help. I was too impatient, the UPHClean ReadMe revealed that the service just takes time to do its job.