Technology Bits

You can execute vSphere's Powercli from your Linux box, without the need to run Windows. Beautiful, isn't it? And gets better: there is a docker image for that ( reference ). It's as easy as: docker run --rm -it --entrypoint='/usr/bin/powershell' vmware/powerclicore But then you create a docker-composer file and want to execute a cmdlet that has a dollar sign ($) diretcly Docker's entrypoint. Didn't find the solution on the web. Only by chance, and after few hours of trial and error, the beauty is revealed: have to double scape the dollar sign. Turn this: entrypoint: |   bash -c '/usr/bin/powershell <<EOF     Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -Confirm: $false ...  EOF' Into this: entrypoint: |   bash -c '/usr/bin/powershell <<EOF     Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -Confirm: \$$false ...  EOF' And there you go. ( Issue reported on Docker PowerCli Gith

All of a sudden a CIFS mount point stopped working. Probably after a kernel update, according to sources. Syslog got this: $ grep cifs /var/log/syslog Dec 28 09:56:12 hostname kernel: [141586.846065] CIFS VFS: cifs_mount failed w/return code = -5 Not really helpful, could be few different things. Turns out Samba now defaults to version 3 of protocol but the old server I connect to doesn't support it. Just add  vers=2.1 to the options and it is back working. On the command line: sudo mount -v -t cifs //server/mount$ /dir/dir -o credentials=/etc/samba/credentials ,vers=2.1 In fstab: //server/mount$  /dir/dir  cifs uid=user,gid=user,credentials=/etc/samba/credentials ,vers=2.1    0  0 Reference .