How to uninstall Cygwin on Windows 10 successfully? If you have no idea of that, you come to the right place. Now scroll down to see what they are.
How to uninstall Cygwin on Windows 10? Some methods are shared with you below, and before trying these methods, you should make sure that you have administrative rights and stop any Cygwin services running such as sshd, cron, cygserver, inetd, apache, and postgresql. The common way to remove a program on Windows 10 is to use Control Panel. So, you can try uninstalling Cygwin on Windows 10 via Control Panel.
What this link says:. The last parameter makes takeown assume "yes" to all questions and depends on locale. This method should work as intended in Windows 7 and above. I tried it in Windows7-x64 and Windowsx If you have Linux subsystem installed I have Ubuntu Just do,.
Problem with cmd. In a way, this is the same as Lucian's answer because it makes the computer consider the file as a regular file. How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. The Cygwin Setup program can be used to install any packages that are on a Cygwin mirror, which usually includes at least one version previous to the current one.
There is no complete archive of older packages. That said, if you really need an older package, you may be able to find an outdated or archival mirror by searching the web for an old package version for example, gcc Here is how Cygwin secures the installation and update process to counter man-in-the-middle MITM attacks :.
The Cygwin website provides the Cygwin Setup program setup-x This authenticates that the Cygwin Setup program came from the Cygwin website users simply use their web browsers to download the Cygwin Setup program. The cygwin. The Cygwin Setup program has the Cygwin public key embedded in it. The Cygwin public key is protected from attacker subversion during transmission by the previous step, and this public key is then used to protect all later steps. The Cygwin Setup program downloads the package list setup.
The package list is in the files setup. The package list includes for every official Cygwin package the package name, cryptographic hash, and length in bytes. The Cygwin Setup program also gets the relevant. The packages to be installed which may be updates are downloaded and both their lengths and cryptographic hashes from the signed setup. Non-matching packages are rejected, countering any attacker's attempt to subvert the files on a mirror.
Cygwin currently uses the cryptographic hash function SHA for the setup. Cygwin uses the cryptographic hash algorithm SHA as of This was noted on the front page for installing and updating. If you use the actual Cygwin public key, and have an existing secure signature-checking process, you will counter many other attacks such as subversion of the Cygwin website and malicious certificates issued by untrustworthy certificate authorities CAs.
One challenge, of course, is ensuring that you have the actual Cygwin public key. You can increase confidence in the Cygwin public key by checking older copies of the Cygwin public key to see if it's been the same over time. Another challenge is having a secure signature-checking process. Otherwise, to check the signature you must use an existing trusted tool or install a signature-checking tool you can trust.
Not everyone will go through this additional effort, but we make it possible for those who want that extra confidence. We also provide automatic mechanisms such as our use of HTTPS for those with limited time and do not want to perform the signature checking on the Cygwin Setup program itself.
Unless you can confirm it, please don't report it to the mailing list. Anti-virus products have been known to detect false positives when extracting compressed tar archives. If this causes problems for you, consider disabling your anti-virus software when running the Cygwin Setup program. Read the next entry for a fairly safe way to do this. Both Network Associates formerly McAfee and Norton anti-virus products have been reported to "hang" when extracting Cygwin tar archives.
If this happens to you, consider disabling your anti-virus software when running the Cygwin Setup program. The following procedure should be a fairly safe way to do that:. This should be safe, but only if the Cygwin Setup program is not substituted by something malicious. When using the Cygwin Setup program for the first time, the default is to install a minimal subset of all available packages.
If you want anything beyond that, you will have to select it explicitly. Long ago, the default was to install everything, much to the irritation of most users. Now the default is to install only a basic core of packages. The Cygwin Setup program is designed to make it easy to browse categories and select what you want to install or omit from those categories.
There are now more than Cygwin packages requiring more than GB of disk space just to download and hundreds of GB more to install so you are strongly advised not to attempt to install everything at once, unless you have a lot of free disk space, a very high speed network connection, and the system will not be required for any other purpose for many hours or days until installation completes.
For a bit Cygwin installation, you can not install everything, as the installation will fail because the 4GB memory available is insufficient to allow all the DLLs required to run along with the programs using them.
That depends, obviously, on what you've chosen to download and install. A full installation today is many hundreds of GB installed, not including the package archives themselves nor the source code.
By default the location of the Cygwin Setup program. You may conserve disk space by deleting the subdirectories there. Of course, you can keep them around in case you want to reinstall a package. First, make sure that you are using the latest version of the Cygwin Setup program.
It could be that the network is too busy. Something similar could be the cause of a download site not working. Try another mirror, or try again later. If you are reacting quickly to an announcement on the mailing list, it could be that the mirror you are using doesn't have the latest copy yet. Try another mirror, or try again tomorrow. If the Cygwin Setup program has otherwise behaved strangely, check the files setup. It may provide some clues as to what went wrong and why.
If you're still baffled, search the Cygwin mailing list for clues. Others may have the same problem, and a solution may be posted there.
If that search proves fruitless, send a query to the Cygwin mailing list. You must provide complete details in your query: version of the Cygwin Setup program, options you selected, contents of setup. Most definitely yes! UNIX shells and thus Cygwin use the space character as a word delimiter. Under certain circumstances, it is possible to get around this with various shell quoting mechanisms, but you are much better off if you can avoid the problem entirely.
Then you can simply edit your Cygwin user name first field. It's also a good idea to avoid spaces in the home directory. When using Cygwin from a network login via ssh for instance , HOME is always taken from the passwd entry. Access to shared drives is often restricted when starting from the network, thus Domain users may wish to have a different HOME in the Windows environment on shared drive than in Cygwin on local drive.
Note that ssh only considers the account information as retrieved by getpwnam 3 , disregarding HOME. Run the Cygwin Setup program as you would to install packages. List all services you have installed with cygrunsrv -L. If you do not have cygrunsrv installed, skip this FAQ. If you have inetd configured to run as a standalone service, it will not show up in the list, but cygrunsrv --stop inetd will work to stop it as well.
Setup has no automatic uninstall facility. The recommended method to remove all of Cygwin is as follows:. Common services that might have been installed are sshd , cron , cygserver , inetd , apache , postgresql , and so on. Stop the X11 server if it is running, and terminate any Cygwin programs that might be running in the background. Exit the command prompt and ensure that no Cygwin processes remain.
If you installed cyglsa. Delete the Cygwin root folder and all subfolders. If you get an error that an object is in use, then ensure that you've stopped all services and closed all Cygwin programs.
For example, sometimes files used by system services end up owned by the SYSTEM account and not writable by regular users. The quickest way to delete the entire tree if you run into this problem is to take ownership of all files and folders to your account. To do this in Windows Explorer, right click on the root Cygwin folder, choose Properties, then the Security tab. Select Advanced, then go to the Owner tab and make sure your account is listed as the owner.
Select the 'Replace owner on subcontainers and objects' checkbox and press Ok. After Explorer applies the changes you should be able to delete the entire tree in one operation. Note that you can also achieve by using other tools such as icacls. Delete the Cygwin shortcuts on the Desktop and Start Menu, and anything left by the Cygwin Setup program in the download directory. However, if you plan to reinstall Cygwin it's a good idea to keep your download directory since you can reinstall the packages left in its cache without redownloading them.
If you added Cygwin to your system path, you should remove it unless you plan to reinstall Cygwin to the same location. However, if you followed the directions above you will have already removed everything important. Typically only the installation directory has been stored in the registry at all.
First, are you sure you want to do this? Snapshots are risky. They have not been tested. Use them only if there is a feature or bugfix that you need to try, and you are willing to deal with any problems, or at the request of a Cygwin developer. Note the directory where you saved the snapshot tarball. Before installing a snapshot, you must first Close all Cygwin applications, including shells and services e.
You will not be able to replace cygwin1. You may have to restart Windows to clear the DLL from memory beware of automatic service startup. Most of the downloaded snapshot can be installed using tar. If you are only installing the DLL snapshot, skip the first tar command.
Open a bash shell it should be the only running Cygwin process and issue the following commands:. The operative word in trying the snapshots is " trying ". To restore the rest of the snapshot files, reinstall the " cygwin " package using the Cygwin Setup program. The Cygwin Setup program cannot do this for you.
Use a tool designed for this purpose. For more information on setting up a custom Cygwin package server, see the Cygwin Setup program page. Please note that these instructions are very old and are referring to the somewhat different setup of a Cygwin 1. As soon as somebody set this up for recent Cygwin releases, we might add this information here. Cygwin doesn't store anything important in the registry anymore for quite some time. There's no reason to save, restore or delete it. Be sure to at least read any 'Release Notes' or 'Readme' or 'read this' links on the main web page, if there are any.
Why can't my application locate cygncurses To repair the damage, you must run the Cygwin Setup program again, and re-install the package which provides the missing DLL package. If you already installed the package at one point, the Cygwin Setup program won't show the option to install the package by default. This lists all packages, even those that are already installed. Scroll down to locate the missing package, for instance libncurses8.
Continue with the installation. If your terminal windows suddenly began starting slowly after a Cygwin upgrade, it may indicate issues in the authentication setup. Although these files can still be used, since Cygwin 1. To switch to the new method, move these two files out of the way and restart the Cygwin terminal.
That runs Cygwin in its new default mode. At worst, it will only be a bit slower. The speed difference you see depends on which benchmark you run.
For the AD case, it can be slower than the old method, since it is trading a local file read for a network request. Version 1. If you are still experiencing very slow shell startups, there are a number of other things you can look into:. This particularly affects AD clients, but there may be other things in your Cygwin startup that depend on getting fast answers back from a network server.
Keep in mind that this may affect Cygwin even when the domain controller is on the same machine as Cygwin, or is on a nearby server. The Cygwin DLL queries information about every group you're in to populate the local cache on startup.
You may speed up this process a little by caching your own information in local files. This will limit the need for Cygwin to contact the AD domain controller DC while still allowing for additional information to be retrieved from DC, such as when listing remote directories. Either in addition to the previous item or instead of it, you can run cygserver as a local caching service to speed up DC requests.
Cygwin programs will check with cygserver before trying to query the DC directly. A less preferable option is to create a static read-only cache of the authentication data. This is the old-fashioned method of making Cygwin integrate with AD, the only method available in releases before 1.
If your AD servers are slow, this local cache will speed things up. The downside is that you open yourself up to the stale cache problem : any time the AD databases change, your local cache will go out of date until you update the files manually. If none of the above helps, the best troubleshooting method is to run your startup scripts in debug mode.
Right-click your Cygwin Terminal icon, go to Properties, and edit the command. The -x option tells Bash to write every command it runs to the terminal before launching it.
If the terminal immediately starts filling with lines of text but then pauses, the line where the output paused is your clue as to what's going on. The Cygwin DLL proper probably isn't the cause of the slowdown in this case, since those delays happen before the first line of text appears in the terminal.
If suddenly every command takes a very long time, then something is probably attempting to access a network share. If your service is one of those which switch the user context sshd, inetd, etc , then it depends on the method used to switch to another user. The line is. And you must not omit the Windows system directories!
Otherwise you will likely encounter all sorts of problems running Cygwin applications. If you're using another shell than bash say, tcsh , the mechanism is the same, just the names of the login scripts are different.
Unlike the Windows default behaviour, Unix shells like bash do not look for programs in. You can add. Just tell bash where to find it, when you type it on the command line:. Use the 'cygpath' utility. Type ' cygpath --help ' for information. For example on my installation :. So you need to set HOME and the home dir in your passwd account information correctly. Cygwin does support spaces in filenames and paths. That said, some utilities that use the library may not, since files don't typically contain spaces in Unix.
If you stumble into problems with this, you will need to either fix the utilities or stop using spaces in filenames used by Cygwin tools. In particular, bash interprets space as a word separator. You would have to quote a filename containing spaces, or escape the space character. For example:.
It sees a shortcut as a regular file and this you cannot "cd" into it. Windows applications can usually make use of Cygwin shortcuts but not vice versa. This is by choice. The reason is that Windows shortcuts may contain a bunch of extra information which would get lost, if, for example, Cygwin tar archives and extracts them as symlinks.
Changing a Cygwin shortcut in Windows Explorer usually changes a Cygwin shortcut into a Windows native shortcut. Afterwards, Cygwin will not recognize it as symlink anymore. Make sure you are using the find that came with Cygwin and that you aren't picking up the Win32 find command instead. You can verify that you are getting the right one by doing a "type find" in bash.
If the path argument to find, including current directory default , is itself a symbolic link, then find will not traverse it unless you specify the -follow option. This behavior is different than most other UNIX implementations, but is not likely to change. If find does not seem to be producing enough results, or seems to be missing out some directories, you may be experiencing a problem with one of find's optimisations.
The absence of. See the documentation for the option -noleaf in the man page. The su command has been in and out of Cygwin distributions, but it has not been ported to Cygwin and has never worked. It is currently installed as part of the sh-utils, but again, it does not work. You should rather install sshd and use ssh username localhost as a su replacement.
Why doesn't man -k , apropos or whatis work? Before you can use man -k , apropos or whatis , you must create the whatis database. Just run the command. There are two basic problems you might run into. Or, it could be a permission problem, and Cygwin doesn't understand that your script is executable.
However, chmod may not work due to restrictions of the filesystem see FAQ entry above. In this case Cygwin must read the contents of files to determine if they are executable.
If your script does not start with. The Bourne shell idiom. This can be used for individual files as well as directories. Then Cygwin will not bother to read files to determine whether they are executable. Some usage hints are available courtesy of Rodrigo Medina. Jason Tishler has written a couple of messages that explain how to use a2ps for nicely formatted text in PostScript and ghostscript to print PostScript files on non-PostScript Windows printers. Note that these are old mails and a2ps as well as file are long available as part of the Cygwin distribution.
Alternatively, you can use the Windows print command. Finally, you can simply cat the file to the printer's share name:. You may need to press the formfeed button on your printer or append the formfeed character to your file.
Internationalization is a complex issue. The long answer can be found in the User's Guide in the section Internationalization. Cygwin uses UTF-8 by default. Setting the locale in the terminal's options will set the LANG variable accordingly. Non-Cygwin programs in the Cygwin Terminal do not usually take heed of the locale environment variables. The codepage number for Cygwin's default UTF-8 character set is The Cygwin DLL has to handle various sharing situations between multiple processes.
It has to keep a process table. It has to maintain a mount table which is based on the installation path of the Cygwin DLL. For that reason, the Cygwin DLL maintains shared resources based on a hash value created from its own installation path. Therefore, you can install two or more separate Cygwin distros on a single machine.
Each of these installations use their own Cygwin DLL, and they don't share the default POSIX paths, nor process tables, nor any other shared resource used to maintain the installation. However, a clean separation requires that you don't try to run executables of one Cygwin installation from processes running in another Cygwin installation.
This may or may not work, but the chances that the result is not what you expect are pretty high. May 30, Broni.
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