When I attempted to copy an Outlook .ost file to an external USB flash drive, I saw the message below:

I didn't have Outlook open and didn't know what other process was using the file. One way to find out which process has a lock on a file is to use the Process Explorer utility provided by Microsoft. The program is free and you don't need administrator rights on a system to use it. To determine a process that is using the file, you can hit the Ctrl and F keys simultaneously, which will bring up a search box where you can type the name of the relevant file. When you click on the Search button, you should be able to see the name of the process that has a lock on the file as well as the process ID (PID) for that process. E.g., in this case I could see that lync.exe was using the file.

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[/os/windows/processes] permanent link

I upgraded a MacBook Pro laptop that was running OS X El Capitan to macOS High Sierra (10.13.6) this week. The laptop was running Apache webserver software. After the upgrade, the system wasn't listening on port 80 for HTTP connections, but I was able to start it listening again with sudo apachectl start.

$ netstat -a | grep http | grep LISTEN
$ sudo apachectl start
Enter PIN for 'Certificate For PIV Authentication (JAMES CAMERON)': 
$ netstat -a | grep http | grep LISTEN
tcp46      0      0  *.http                 *.*                    LISTEN     
$

I was then able to access the default webpage at http://localhost which displayed the page contained in index.html.en file in the DocumentRoot directory at /Library/WebServer/Documents, but whenever I attempted to display pages I had created elsewhere, I kept getting a "404 Not Found" page indicating the requested URL was not found on the server. When I checked /private/etc/apache2/extra/httpd-vhosts.conf, I found it had a April 4, 2018 timestamp, but no longer had the virtual host information I had previously put in the file.

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[/os/macOS] permanent link

If you need to rip a CD from a command-line interface (CLI) on a CentOS Linux system, cdparanoia will allow you to do so. The cdparanoia CD ripper program will allow you to produce Waveform Audio File Format, i.e., .WAV, files from the tracks on a CD. You can use the yum package management software to install the software with by issuing the command yum install cdparanoia from the root account.

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[/os/unix/linux/centos/music] permanent link

Sometimes you may find that a software package that you would like to use on a CentOS Linux system is unavailable from the default software repositories, aka "repos." In such cases adding alternative repos, such as Extra Packages for Enterprise Linux (EPEL) or RPM Fusion may allow you to locate the desired package. E.g., the VLC media player is available in the RPM Fusion repository, but not the default ones nor in EPEL. RPM Fusion has two separate software repositories, one that contains free and open-source software (FOSS) and another named "nonfree". Packages in the "nonfree" repository still won't cost you anything, but there may be restrictions on the use of the software, e.g., you may be forbidden from using the software for commercial use. The RPM Fusion site defines the nonfree repo as being 'for redistributable software that is not Open Source Software (as defined by the Fedora Licensing Guidelines); this includes software with publicly available source-code that has "no commercial use"-like restrictions.'

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[/os/unix/linux/centos] permanent link

I wanted to try the Pale Moon web browser, which is free and open-source software (FOSS) on a CentOS 7 Linux system, but when I tried installing it with yum, the package was not found.

# yum install palemoon
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos-distro.1gservers.com
 * epel: archive.linux.duke.edu
 * extras: centos.host-engine.com
 * updates: centos.den.host-engine.com
No package palemoon available.
Error: Nothing to do
#

I was able to resolve the problem, by adding the Pale Moon repository.

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[/network/web/browser] permanent link