Posted by jpluimers on 2017/06/21
For one of my VMs I forgot to note which of the initial password I had changed, so I wanted to check them.
Since I didn’t have a keyboard attached to the console and ssh wasn’t allowing root, I needed an alternative than actual login to test the passwords.
Luckily /etc/shadow, with getent and openssl came to the rescue.
Since getent varies per distribution, here is how it works on OpenSuSE:
Posted in *nix, *nix-tools, ash/dash, bash, bash, Development, Encoding, Hashing, Linux, md5, openSuSE, Power User, Scripting, Security, SHA, SHA-256, SHA-512, Software Development, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2017/06/20
One day I need to research how to get the conversions right for this: How do I Check DHCP Lease info in terminal – Ars Technica OpenForum as I think that ipconfig getoption en0 lease_time gives me the value in a different format than date -r expects.
Also:
At T1 seconds (typically set to 0.5*lease_time) after the last successful renewal, the DHCP client attempts to renew it’s lease with the DHCP server that granted it’s current address via unicast. If unsuccessful, at T2 seconds (typically set to 0.875*lease_time) after the last renewal, the DHCP client attempts to rebind with any DHCP server via multicast.
–jeroen
Posted in Apple, bash, Development, Mac, Mac OS X / OS X / MacOS, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/04/20
Note this works only when the VMs have VMware Tools installed (more on that below):
VMWare provides, not surprisingly, a built in tool for this, vmrun. It’s under
/Applications/VMware Fusion.app/Contents/Library/vmrunalthough it has moved around in other Fusion releases a bit.
🍺 vmrun list Total running VMs: 1 .docker/machine/machines/myvm.vmx
🍺 vmrun getGuestIPAddress ~/.docker/machine/machines/myvm.vmx 172.16.213.128
via: How do I find the IP address of a virtual machine using VMware Fusion? – Super User [WayBack]
vmrun [WayBack] is barely documented and most of is in PDF of which this is the most recent I could find: www.vmware.com/pdf/vix180_vmrun_command.pdf [WayBack]
Based on the above path, I added this to my ~/.bash_profile file:
alias vmrun='/Applications/VMware\ Fusion.app/Contents/Library/vmrun'
alias vmrun-list-running-VMs='vmrun list | grep vmx'
vmrun-list-ipv4-of-running-VMs()
{
vmrun-list-running-VMs | while read line ; do echo $line && vmrun getGuestIPAddress $line; done
}
Now I can do this:
$ vmrun-list-ipv4-of-running-VMs
/Users/jeroenp/VM/W81Entx64DelphiRegression.vmwarevm/W81Entx64.vmx
172.16.172.135
/Users/jeroenp/VM/diaspore-opensuse-Tumbleweed-x64.vmwarevm/diaspore-opensuse-Tumbleweed-x64.vmx
Error: The VMware Tools are not running in the virtual machine: /Users/jeroenp/VM/diaspore-opensuse-Tumbleweed-x64.vmwarevm/diaspore-opensuse-Tumbleweed-x64.vmx
$ vmrun-list-ipv4-of-running-VMs
/Users/jeroenp/VM/diaspore.opensuse-Tumbleweed-x64/diaspore.opensuse-Tumbleweed-x64.vmx
Error: Unable to get the IP address
/Users/jeroenp/VM/W81Entx64DelphiRegression.vmwarevm/W81Entx64.vmx
172.16.172.135
$ vmrun-list-ipv4-of-running-VMs
/Users/jeroenp/VM/diaspore.opensuse-Tumbleweed-x64/diaspore.opensuse-Tumbleweed-x64.vmx
Error: Unable to get the IP address
/Users/jeroenp/VM/W81Entx64DelphiRegression.vmwarevm/W81Entx64.vmx
172.16.172.135
$ vmrun-list-ipv4-of-running-VMs
/Users/jeroenp/VM/diaspore.opensuse-Tumbleweed-x64/diaspore.opensuse-Tumbleweed-x64.vmx
172.16.172.134
/Users/jeroenp/VM/W81Entx64DelphiRegression.vmwarevm/W81Entx64.vmx
172.16.172.135
$ vmrun-list-ipv4-of-running-VMs
/Users/jeroenp/VM/diaspore.opensuse-Tumbleweed-x64/diaspore.opensuse-Tumbleweed-x64.vmx
172.16.172.134
/Users/jeroenp/VM/W81Entx64DelphiRegression.vmwarevm/W81Entx64.vmx
172.16.172.142
These are the messages I observed:
Error: The VMware Tools are not running in the virtual machine: /Users/jeroenp/VM/diaspore-opensuse-Tumbleweed-x64.vmwarevm/diaspore-opensuse-Tumbleweed-x64.vmx
Error: Unable to get the IP address
172.16.172.135
The first one means a machine is running but has no VMware Tools installed. For an OpenSuSE machine you can install it with zypper install open-vm-tools, for other Linux systems read VMware Tools auf Ubuntu, Mint, CentOS oder openSUSE installieren | ITrig [WayBack]
Some more examples of vmrun for VMware Fusion are at Control VMware Fusion from the Command Line | James Reuben Knowles [WayBack]
–jeroen
Posted in *nix, bash, Development, Fusion, openSuSE, Power User, Scripting, Software Development, SuSE Linux, Tumbleweed, Virtualization, VMware | Leave a Comment »
Posted by jpluimers on 2017/04/18
Glueing together APIs requires working with JSON: parsing it, extracting it, transforming it. JQ is a fast, lightweight, flexible, CLI JSON processor, that does the job well. Learn how to use it by getting your hands dirty with a JSON blob that represents the open issues in the public Docker GitHub repository.
via: http://blog.librato.com/posts/jq-json – Joe C. Hecht – Google+
–jeroen
Source: http://blog.librato.com/posts/jq-json
Posted in bash, Development, JavaScript/ECMAScript, jq, JSON, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/04/13
Cool: .bashrc generator: create your .bashrc PS1 with a drag and drop interface
–jeroen
http://bashrcgenerator.com/ – Joe C. Hecht – Google+
Posted in bash, Development, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/04/11
In order to scan some local networks for unknown hosts (yes, on some sites you need to perform archeology), I needed the local IPv4 addresses, netmasks and CIDRs on my Mac running OS X.
Part of that is using ifconfig to get local inet information which however uses hexadecimal network masks and delivers no CIDRs.
SoI was a bit premature when I wrote about “This could be done by creating bash functions mask2cdr and cdr2mask, but that’s a bit too convoluted right now” in Getting the IP addresses of gmail MX servers – via Super User – dig isn’t enough.
I need mask2cdr now, so lets start with these two bash functions and their aliases:
Posted in *nix, *nix-tools, Apple, bash, Development, Mac OS X / OS X / MacOS, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/04/06
Found these then trying to create a new feature for https://github.com/Hexxeh/rpi-update:
–jeroen
Posted in bash, Development, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/04/05
A friend of mine made the mistake to capture some CDs using WMA files and throwing away the CDs. His old Nokia could play them, but not his new iOS and Android devices.
ffmeg and bash to the rescue:
find . -iname "*.wma" -execdir bash -c 'NAME="{}" && ffmpeg -y -i "$NAME" -ab 192k "${NAME/.wma/.mp3}" -map_metadata 0:s:0 && rm "$NAME"' \;
Tricks used:
Posted in *nix, *nix-tools, Audio, bash, bash, Development, ffmpeg, Media, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/03/31
In addition to my post about Mac OS X: restarting Google Drive when it shows a spinning wheel, restarting a hanging Tunnelblick is even easier:
killall Tunnelblick
open -a Tunnelblick
–jeroen
Posted in Apple, bash, Development, iMac, Mac, Mac OS X / OS X / MacOS, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/03/29
Every now and then, Google Drive on Mac OS X gets confused and starts showing the spinning wheel when hovering over the menu bar icon similar to for instance DropBox does every once in a while.
This is how to terminate and restart Google Drive from the terminal (no need for su):
killall -v -SIGKILL Google\ Drive
open -a Google\ Drive
Alternatively you can start Google Drive using this:
/Applications/Google\ Drive.app/Contents/MacOS/Google\ Drive &
I found this executable through osx – Find all executable files within a folder in terminal – Ask Different
Note that this won’t kill Google Drive as it sends the TERM signal (SIGTERM):
killall -v Google\ Drive
–jeroen
Posted in Apple, bash, Development, Google, GoogleDrive, iMac, Mac, Mac OS X / OS X / MacOS, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.8 Mountain Lion, OS X 10.9 Mavericks, Power User, Scripting, Software Development | 1 Comment »
The Wiert Corner - irregular stream of stuff 