I have an application that use EXE file in it.
I want to secure EXE file, I encrypt file but it should be decrypted to use in the program, so I have to create temporary EXE file in to hard disk.
my questions are:
1) How can I create it in memory that no one can access to it? (EXE file uses commands to run)
2) How can I run this file from locked folder without unlocking folder?
One thing you can do is to change its permissions such that only administrators can access the file.
Then run the program as administrator.
Use VeraCrypt (or another TrueCrypt clone). Create an image and put the file into it. It will be encrypted this way. If you want to use it, mount it as a drive and run the exe file inside.
Related
I require a VM for developing and my host is where my IDE is. I have discovered that inotifywait does not work with shared folders, as I am sharing a local folder with my Linux guest using Virtual Box.
Basically, I have a simple bash script which needs to watch a directory and wait for any file changes. Inotifywait would be the best option but I cannot get it to work with my shared folder.
I was wondering if there is another option for my problem?
Depending on the sizes of the files and the nature of the changes you could:
Create a checksum (md5, CRC, SHA256) of the files and watch for changes
check the size of the files and watch for changes
When I download source code from perforce, the symlinks gets downloaded as files and the project, of course, doesn't build. This happens on certain computers and virtual machines but the same symlinks download fine on other computers.
The download file is often a short file which just contains path of the linked file instead of being zero byte symlink file.
This actually had to do with user permissions on windows, not so much with perforce. The problem is that the user doesn't have permission to create symlinks so perforce ends up creating a file (In my opinion, it should generate an error message instead of converting the symlink to file).
The simple solution in most cases should be to start P4V as administrator and then download the source code. You may have to force it to download everything since it will not re-download wrong symlinks because those objects already exist on disk.
You can check if you have permissions with the following command. More here.
mklink <linkFile> <ExistingFile>
Note: you may well be able to create symlinks (=shortcuts) using File Explorer but it's the command line (above) that will determine if you have the privileges or not.
I am working with a live Linux version. If I create a user and that user creates a file, how can I make that file visible for that user after I have restarted the system? (Normally it would be erased)
You can save the file in the device's hard drive, if you are using a CD/DVD.
In case you are using a flash drive, you can save the file in the root / folder.
Note: Be careful with name given in root folder, try to avoid things like boot or other names found in that folder. They are used to start the live system and boot manager usually recognize them based only in file names
I wanna to freeze a folder in red hat so nobody (even root) can not add file into the folder or change files that exist in the folder already, i tried to make folder read only but this does not work and root user can add files normally as before, please somebody help me to solving this problem.
Create a filesystem in a file (eg: an iso file) containing the files you want in the directory then use a loopback mount to mount it read only onto the directory.
Anybody who tries to modify the filesystem normally (including root) will get a "read-only filesystem" error.
No. By design, in Linux, root ignores existing permissions on all entities. However, what you can do is encrypt files so that they can't be read and can't be modified by those who don't know the key. You can't prevent new files from being added, but with both encryption and decryption keys private, you can easily verify if any file is valid.
This also means you can't have either key on your computer!
I gave execute permissions to a file and then compressed into a zip file in Linux OS. Then I moved this zip file to Windows and again copied it to another Linux server. This time I don't have the execute permission.
I know that we can directly copy the files and folders using scp command withing Linux but I have to let the user copy it from Windows to Linux also.
Please let me know how can I preserve the permissions while copying from Windows to Linux.
Thanks.
Since your executable file is inside a zip-archive it doesn't really matter what filesystem you're on or what operating system you're on. As long as the zip-archive is untouched.
However, as far as I know, zip-archives cannot keep track of file permissions. You can read more about it here:
Maintain file and folder permissions inside archives
It's up to whatever application is actually doing the copy.
But there are serious differences between the idea of file permissions on Linux/UNIX and Windows. UNIX file permissions have the idea of being "executable" which is not something that exists on Windows. Windows files are noted as runnable by their file extension not its permissions.
Furthermore, file permissions on UNIX have the concept of a group owner, and I don't think this exists on Windows so such a thing might not be possible in the strictest sense.
If you just want the writable/readable permissions as assigned to the owner to stick however, it will again depend on the application you are using to do the copy.
More recently, you can also use the Linux subsystem for Windows and zip the file using the linux shell command. I successfully did this recently when copying a executable for AWS from github to my Windows machine, and then up to Amazon.
Thanks for all your responses.
I found 2-solutions for my problem:
I am copying the complete zip file to the Linux server instead of copying a single file. This way it works fine.
Using cygwin helps me in copying the file onto a Linux server by preserving the execute permissions.