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From: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
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Date: Thu, 4 May 2017 12:35:45 +0200
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On 04/05/2017 12:16, David Macek wrote:
> On 4. 5. 2017 11:33, Alex Brega wrote:
>> Would be possible for you to provide me these files (dbus-daemon.exe and ssh.exe) via mail or uploaded somewhere in order to recover them on their original folders ?
>
> The installer can re-install any broken packages, including those containing ssh.exe and dbus-daemon.exe. The installer is available at <https://cygwin.com/install.html>.
>

Alex,
to find the package containing a given file you can use cygcheck.

$ cygcheck -p usr/bin/ssh.exe
Found 4 matches for usr/bin/ssh.exe
openssh-debuginfo-7.4p1-1 - openssh-debuginfo: Debug info for openssh 
(installed binaries and support files)
openssh-debuginfo-7.5p1-1 - openssh-debuginfo: Debug info for openssh
openssh-7.4p1-1 - openssh: The OpenSSH server and client programs 
(installed binaries and support files)
openssh-7.5p1-1 - openssh: The OpenSSH server and client programs

so you need to reinstall openssh-7.5p1-1

Similar for dbus-daemon.exe  ->  dbus-1.10.8-1

The best approach, as David suggests, is to reinstall the package with 
setup; however you can also download the package files from a mirror
and extract the file, but this could create wrong file pernmissions:

Assuming you need to the 64bit version package file:

http://ba.mirror.garr.it/mirrors/sourceware.org/cygwin/x86_64/release/openssh/openssh-7.5p1-1.tar.xz 


http://ba.mirror.garr.it/mirrors/sourceware.org/cygwin/x86_64/release/dbus/dbus-1.10.8-1.tar.xz 


use "x86" instead of "x86_64" for 32bit version

Regards
Marco

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