I would like to know if I can use g++ to compile C++ source files stored on an FTP server? Can this be done?
Note: The FTP server is within the local network
You can't execute commands over FTP, nor can you operate directly on files stored on an FTP server unless you have mapped the FTP server to a filesystem. How to do the latter depends on your operating system.
Since you said g++, I assume Linux, so look into FTPFS.
No, this is not possible. Ftp doesn't allow you to execute programs on the server, it is just used to transfer files. To execute programs (like the compiler) you need some different kind of access to the server, like for example with Ssh.
If you are using a Linux system (and probably any *nix or BSD flavout as well) then yes it is possible if the ftp-server is mounted as a filesystem on your machine, like Tyler McHenry wrote.
It is however not neccessary to "look into FTPFS" if you are using any recent Gnome-based distro. In Ubuntu (9.04) I can do "Places"->"Connect to server" and choose FTP. Then, when the folder is opened in Nautilus you can find the mounted directory in ~/.gvfs/ and then you should be able to compile it without any trouble at all.
I would be very surprised if KDE did not have the same feature, but the directory will be mounted somewhere else.
Does the FTP server have a public website that works with scripting languages, such as PHP? If so, you could upload your source code, edit a PHP file that calls system and compile your code.
In general this probably isn't a good idea: It's a slow, manual process & could be subject to security problems if the PHP script lets you edit the compilation command.
Related
I have a Linux subsystem installed on my Windows machine. I've transferred a tar.gz file I want to access by finding the location of my subsystem and dragging the files over. But when I run the command:
tar -zxvf file_name.tar.gz
I get the error:
tar (child): vmd-1.9.4a51.bin.LINUXAMD64-CUDA102-OptiX650-OSPRay185.opengl.tar.gz: Cannot open: Permission denied
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now
I assume permission being denied is to do with having transferred from Windows since I couldn't access directories I created through Windows either. So, is there something I need to change to gain access to these files?
(PS. I know there are other way of getting tar.gz files other than transferring from Windows, but I'll need to do this for other folders too, I only included the filetype in case it was relevant .)
EDIT: You shouldn't attempt to drag files over. See answer below.
For starters, this belongs on Super User since it doesn't deal directly with a programming question. But since you've already provide an answer here that may be slightly dangerous (and even in your question), I didn't want to leave this unanswered for other people to find inadvertently.
If you used the first method in that link, you are using a WSL1 instance, not WSL2. Only WSL1 made the filesystem available in that way. And it's a really, really bad idea:
There is one hard-and-fast rule when it comes to WSL on Windows:
DO NOT, under ANY circumstances, access, create, and/or modify Linux files inside of your %LOCALAPPDATA% folder using Windows apps, tools, scripts, consoles, etc.
Opening files using some Windows tools may read-lock the opened files and/or folders, preventing updates to file contents and/or metadata, essentially resulting in corrupted files/folders.
I'm guessing you probably went through the install process for WSL2, but you installed your distribution before setting wsl --set-default-version 2 or something like that.
As you can see in the Microsoft link above, there's now a safe method for transferring and editing files between Windows and WSL - the \\wsl$\ tmpfs mounts. Note that as a tmpfs mount stored in memory, it's really more for transferring files over. They will disappear when you reboot or shutdown WSL.
But even if you'd used the second method in that article (/mnt/c), you probably would have run into permissions issues. If you do, the solution should be to remount the C: drive with your uid/gid as I describe here.
I'd like to use terminal for all of my normal git and compiling and running processes (my school has a server that is linked to my repo on bitbucket), but I really don't like terminal-based text editing software such as Emacs and Vim. Is it possible to open and edit files from the terminal using a GUI based text editor? The reason I'm asking is because the terminal is the only way I can access the server files. Thanks in advance!
Aw, but vim is the best! :) Well, you can use nano, which is friendlier. Or, if you insist: if you are using SSH to connect to the server (and the server has an X server running !) then you can look into the ssh -X option to view X windows on your remote machine.
Oh and you could look into scp command as well (behaves almost just like regular cp, but the destination is on another host). That way you could edit on your machine, then copy it via SSH (although you'd want to be careful when copying files directly to the server filesystem)
Edit: Also, if you really don't like using the terminal (why though? (-: ), some file managers allow you to get the same functionality of the previous commands purely via GUI (for example).
You've left out some important information that someone would need to know to answer your questions. The other posters have made some assumptions.
You've mentioned this "terminal", but it's not clear exactly what that is, or how you're getting to it. What kind of computer do you have in front of you? What shell is running in that terminal? Is the shell running on your local computer, or have you remotely connected to a server and running that shell on the remote computer?
Based on what you said, I have a feeling you're making a remote connection to a server, perhaps using ssh. You likely have either a Windows or Mac PC in front of you. In those circumstances, running a GUI editor like Eclipse is possible, but likely not practical. You would have to have Eclipse installed on that remote computer, and you would be displaying the Eclipse window on your local computer using the X11 protocol. That takes a lot of bandwidth.
If my assumptions are correct, my recommendations depend on how long you expect you're going to want to stay familiar with this environment. If you intend to do this sort of work forever, then you should learn vi and Emacs to the best of your ability. As someone who's been using Emacs likely longer than you've been alive, I'd recommend you learn it, but vi is also a critical skill.
UNIXY systems provide open or gopen, depending on your OS, that should get the job done. From the man page:
By default, gopen will open filename with the application currently assigned to the file's extension. But by specifing the -a flag on the command line you can tell gopen to open the file with another application.
This means that you can use it to open files in your preferred editor
with a line like
gopen -a Eclipse file
Basically I have some C/C++ code that I need to build and debug on a Linux machine. Unfortunately, my windows laptop doesn't have enough free hard space to install some Linux dist nor does it have enough free RAM to comfortably run VM.
Until now, I dealt with it rather comfortably using WSL, but the scale was rather small. It was easy to edit and debug 2-3 .c files through CLI and gdb, but it became really annoying on a large scale projects.
I want something simple as "edit code in windows IDE [X], compile it on remote Linux/WSL (the project uses Makefiles), and preferably debug it via gdb".
VS has something close to what I want, but it can't deal with existing Linux projects. It needs to create a new configuration which is alien to the project's Makefile.
I know this question is a bit old, but I think the solution is to make a symlink between your WSL folder and the Window's folder. This is how I handled it for a Ubuntu-20.04 WSL:
Access PowerShell in Administrator mode
Type cmd.exe in the PowerShell
Once cmd.exe is opened, type mklink /d C:\<path_to_your_Windows_folder> \\wsl$\Ubuntu-20.04\home\<your_user>\<path_to_your_WSL_folder>
EDIT
This was tested under Windows 10 Version 2004 with WSL2
I'm unsure about C and C++ but it sounds like this is exactly the same as how i work in node and javascript every day.
I checkout my code using git inside WSL to a location like /mnt/c/code/myproject. Then using sublime/VS code/webstorm i edit the files in windows in the location c:\code\myproject this works really well and have been doing this every day for over a year.
Things to be aware of are that you need to ensure that your editor of choice saves files with linux line endings and that all command line operations are done inside WSL.
Please see this article to see the differences between windows and linux files and how this works inside the WSL.
I want something simple as "edit code in windows IDE , compile it on remote linux/WSL
You will have something as simple as that.
Only with Windows 19.03 though:
See "Updated WSL in Windows 10 version 1903 lets you access Linux files from Windows"
Microsoft's Craig Loewen says:
In the past, creating and changing Linux files from Windows resulted in losing files or corrupting data. Making this possible has been a highly requested and long anticipated feature. We're proud to announce you can now easily access all the files in your Linux distros from Windows.
So how does this work? He goes on to explain:
To put it briefly: a 9P protocol file server facilitates file related requests, with Windows acting as the client.
We've modified the WSL init daemon to include a 9P server. This server contains protocols that support Linux metadata, including permissions.
There is a Windows service and driver that acts as the client and talks to the 9P server (which is running inside of a WSL instance).
Client and server communicate over AF_UNIX sockets, since WSL allows interop between a Windows application and a Linux application using AF_UNIX as described in this post.
Warning:
The old rules still apply, you should NOT access your Linux files inside of the AppData folder!
If you try to access your Linux files through your AppData folder, you are bypassing using the 9P server, which means that you will not have access to your Linux files, and you could possibly corrupt your Linux distro.
I was wondering how to set or find the local log files on your computer in Linux. I was reading the GNU C guide on syslog, and when you open a log, you declare the log your going to write to. In the examples they have LOG_LOCAL0, LOG_LOCAL1, LOG_LOCAL2, etc.. How do you set these, or where are they located? I was also wondering where LOG_SYSLOG is located? When i was looking under /var/log, i didn't see anything that looked like a system log. I cannot seem to find much online about the log files themselves. Only how to use the syslog functions.
in linux (I'm running ubuntu 14.04)
the log files are (by default) in /var/log/
one of those files is 'syslog'
if the system has been up for a while
there will also be files named similar to:
'syslog.#.gz' which is a zipped file of the prior syslog(s)
I have a folder a/ and a remote folder A/.
I now run something like this on a Makefile:
get-music:
rsync -avzru server:/media/10001/music/ /media/Incoming/music/
put-music:
rsync -avzru /media/Incoming/music/ server:/media/10001/music/
sync-music: get-music put-music
when I make sync-music, it first gets all the diffs from server to local and then the opposite, sending all the diffs from local to server.
This works very well only if there are just updates or new files on the future. If there are deletions, it doesn't do anything.
In rsync there is --delete and --delete-after options to help accomplish what I want but thing is, it doesn't work on a 2-way-sync.
If I want to delete server files on a syn, when local files have been deleted, it works, but if, for some reason (explained after) I have some files that aren't in the server but exist locally and they were deleted, I want locally to remove them and not server copied (as it happens).
Thing is I have 3 machines in context:
desktop
notebook
home-server
So, sometimes, server will have files that were deleted with a notebook sync, for example and then, when I run a sync with my desktop (where the deleted server files still exist on) I want these files to be deleted and not to be copied again to the server.
I guess this is only possible with a database and track of operations :P
Any simpler solutions?
Thank you.
Try Unison: http://www.cis.upenn.edu/~bcpierce/unison/
Syntax:
unison dirA/ dirB/
Unison asks what to do when files are different, but you can automate the process by using the following which accepts default (nonconflicting) options:
unison -auto dirA/ dirB/
unison -batch dirA/ dirB/ asks no questions at all, and writes to output how many files were ignored (because they conflicted).
Note: I am no longer using Unison (I use NextCloud, which doesn't address the original use case). However, note that rsync is not designed for bidirectional sync, while unison is. unison may have its bugs (as any other piece of software) and its wrinkles. I am surprised it seems to be actively maintained now (last time I looked I think I thought it looked dead), but I'm not sure what's the state nowadays. I haven't had the need to have a two-way file synchronizer, so there may be better options, though.
Since the original question also involves a desktop and laptop and example involving music files (hence he's probably using a GUI), I'd also mention one of the best bi-directional, multi-platform, free and open source programs to date: FreeFileSync.
It's GUI based, very fast and intuitive, comes with filtering and many other options, including the ability to remote connect, to view and interactively manage "collisions" (in example, files with similar timestamps) and to switch between bidirectional transfer, mirroring and so on.
FreeFileSync can easily sync two computers on the same network and also sync two computers on different and remote networks.
On same network: have FreeFileSync use the local file system on one side and a shared network drive / path on the other. On Windows systems you enable file / disk sharing on one computer and access that share from the other. I use FreeFileSync this way to keep my main development PC source code synced with my 2 laptops.
I have also synced one of these laptops with a Linux server with Samba installed and sharing one of its directories.
Across networks: create a VPN and do the same as above. FreeFileSync will see the remote disk as it was on the local network. Or buy one router that allows you to connect a USB disk to it and share over the internet. I have installed a VPN on a remote Linux server and used it through the OpenVPN Windows client.
You could also try bitpocket: https://github.com/sickill/bitpocket
Try this,
get-music:
rsync -avzru --delete-excluded server:/media/10001/music/ /media/Incoming/music/
put-music:
rsync -avzru --delete-excluded /media/Incoming/music/ server:/media/10001/music/
sync-music: get-music put-music
I just test this and it worked for me. I'm doing a 2-way sync between Windows7 (using cygwin with the rsync package installed) and FreeNAS fileserver (FreeNAS runs on FreeBSD with rsync package pre-installed).
You might use Osync: http://www.netpower.fr/osync , which is rsync based with intelligent deletion propagation. it has also multiple options like resuming a halted execution, soft deletion, and time control.
You could try csync, it is the sync engine under the hood of owncloud.
I'm surprised no one has mentioned Syncthing yet. I have been using it for years to synchronize my phone, my tablet and my two laptops. One time I also used it to send 10 GB of photos to my family ~600 km away, straight from my machine to their machine, and it was incredibly fast (despite the data getting routed through Syncthing's discovery server to work around NAT issues). I also tried OwnCloud/NextCloud at some point but Syncthing has been much more reliable and, also, much faster.
I'm now using SparkleShare https://www.sparkleshare.org/
works on mac, linux and windows.
I'm not sure whether it works with two syncing but for the --delete to work you also need to add the --recursive parameter as well.
Rclone is what you are looking for. Rclone ("rsync for cloud storage") is a command line program to sync files and directories to and from different cloud storage providers including local filesystems. Rclone was previously known as Swiftsync and has been available since 2013.