1. Type services in the Windows Search field. You should see it returned by the search utility. Click on "Run as administrator" and provide the login credentials for an account that has adminisrator privileges.
2. When the Services window opens, scroll down until you see Windows Audio.
3. Right-click on the entry and choose "Restart".
4. When the status for the service returns to "Running", you can close the Services window.

[ More Info ]

[/os/windows] permanent link

Sendmail is an email server application that is available for many operating systems. It will listen on TCP port 25 for connections from other mail servers that use the Simple Mail Transfer Protocol for email transmissions. As a message submission agent (MSA), another common port it listens on is TCP port 587 for email transmissions from users' email clients. On a Linux system you can use the netstat or ss commands to determine if a system is listening for connections on a particular port. When I checked a Sendmail server to determine whether it was listening on port 587, I could see that it was not listening on that port, though that was needed.

# netstat -an | grep 587
# ss -ln | grep ":587 "
#

When I searched /etc/mail/sendmail.mc for RELAY_MAILER_ARGS, I saw the following lines, which are needed to have Sendmail listen for email transmissions from users on TCP port 587, were already present and were not commented out:

define(`RELAY_MAILER_ARGS', `TCP $h 587')
define(`ESMTP_MAILER_ARGS', `TCP $h 587')

When I searched for DAEMON_OPTIONS, I saw the following:

dnl # The following causes sendmail to additionally listen to port 587 for
dnl # mail from MUAs that authenticate. Roaming users who can't reach their
dnl # preferred sendmail daemon due to port 25 being blocked or redirected find
dnl # this useful.
dnl #
dnl DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl

I removed the dnl from the begining of the line so that I then had the line below, instead:

DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl

I then rebuilt /etc/sendmail/mc and restarted the Sendmail service.

# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf
# service sendmail restart
Redirecting to /bin/systemctl restart  sendmail.service
#

I could then see that the system was listening for connections on port 587.

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[/network/email/sendmail] permanent link

I needed to install Advanced Diary on an Ubuntu Linux system. for someone who had been using the program for journaling on a Microsoft Windows system. I had previously installed Wine, a program that allows one to run Windows applications on Linux, macOS, and FreeBSD systems. I used AdvDiary.sh, which contains the following lines, to install Advanced Diary:

#!/usr/bin/env bash

set -e

if [ -z "$1" ]; then
  echo "Usage: $0 AdvancedDiarySetup.exe"
  exit 1
fi

INSTALLER="$(realpath "$1")"
PREFIX="$HOME/.wine-advdiary"

echo "Creating 32-bit Wine prefix..."
export WINEPREFIX="$PREFIX"
export WINEARCH=win32
winecfg -v win7 >/dev/null 2>&1 || true

echo "Installing required components (gdiplus, corefonts)..."
winetricks -q gdiplus corefonts

echo "Forcing native GDI+..."
cat > "$PREFIX/user.reg" <<'EOF'
[Software\\Wine\\DllOverrides]
"gdiplus"="native"
EOF

echo "Running Advanced Diary installer..."
wine "$INSTALLER"

echo
echo "✔ Installation complete"
echo "Run with:"
echo "WINEPREFIX=$PREFIX wine \"$PREFIX/drive_c/Program Files/Advanced Diary/Diary.exe\""

To run it, you need to assign "execute" permission to the file, which can be done in a Terminal window with chmod + x filename or chmod a+x filename to make a file executable by all users or chmod u+x filename to make it executable by just the owner of the file, i.e., the user.

alice@Wonderland:~/Downloads$ chmod u+x install-advanced-diary.sh 
alice@Wonderland:~/Downloads$ 

When I ran the shell script .sh file, I realized I hadn't installed Winetricks beforehand, so I installed it with sudo apt install winetricks after running the script. I then reran the installation script for Advanced Diary. The installation completed successfully — I selected the option to have the program opened automatically at the conclusion of the installation — and it appeared to open normally (I had to press Enter in the terminal window to return to the shell prompt).

[ More Info ]

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

If you need to determine if a drive in a Microsoft Windows system or connected to it via USB is BitLocker encrypted, you can use the manage-bde utility. To use the program, open a command prompt window with administrator privileges and then issue the command manage-bde -status to see the status of all drives. To see just the status of one drive, e.g., C:, you could use manage-bde -status C:.

C:\Windows\System32>manage-bde -status c:
BitLocker Drive Encryption: Configuration Tool version 10.0.26100
Copyright (C) 2013 Microsoft Corporation. All rights reserved.

Volume C: [Windows]
[OS Volume]

    Size:                 14826.87 GB
    BitLocker Version:    None
    Conversion Status:    Fully Decrypted
    Percentage Encrypted: 0.0%
    Encryption Method:    None
    Protection Status:    Protection Off
    Lock Status:          Unlocked
    Identification Field: None
    Key Protectors:       None Found


C:\Windows\System32>

[ More Info ]

[/os/windows/commands] permanent link

You can run the Big Fish Games Game Manager on an Ubuntu Linux system under Steam. You can install Steam as a Snap package from the Ubuntu App Center.

Steps:

1. Download the Big Fish Games App (Game Manager) for PC
2. In Steam on the Ubuntu system, click on Add a Game, which is at the lower, left-hand corner of the Steam window, then select Add a Non-Steam Game, then browse to where you downloaded the .exe installer for the game manager, click on it, and then click on Add Selected Programs.
3. You should then see the Big Fish Game Manager in the "Uncategorized" list of games at the left side of the Steam window, e.g., you may see bfginstaller32_s1_l1.exe listed. Right-click on it and then select Properties, then Compatibility, and then, from the drop-down list that becomes available, select Proton Experimental or the latest stable version — I selected Proton Experimental.
4. You can then close the Compatibility window by clicking on the "X" at the upper, right-hand corner.
5. Then with the Big Fish Game Manager selected in the Uncategorized list, click on the Play button to launch the Big Fish Game Manager Setup and agree to the License Agreement when you see it appear.

When I started the install process, the installation appeared to hang at "Execute: C:\Program Files (x86)\bfglient\epoch.exe". When I clicked on the title bar for the window, I saw "About Wine", so it appeared to be using Wine, which I had previously installed on the Ubuntu system. But I waited and eventually the installation succeeded, though I think it took over 15 minutes. I closed the window and then went back to the Steam window, I saw bfginstaller32_s1_l1.exe was still there. This time when I clicked on it, the Big Fish window where I could sign in to Big Fish Games opened fairly quickly.

Note: if the window goes blank or displays just a white background, minimize it by clicking on the "-" in the upper, right-hand corner of the Big Fish window and then switch to it again, which you can do with Alt+Tab — continue to press the Tab key while continuing to hold down the Alt key to cycle between open open windows until you get to the Big Fish window.

Initially, you will see "No games to play," but if you have already purchased games that you've played on another system, you can click on Purchase History and install them on the Linux system. When I installed the Big Fish Games Manager under Steam, I had my wife check one of her games, Aquascapes, and that ran fine. I then closed the Big Fish window and the Steam window and reopened it. Note: if you want to change the name that appears for Big Fish Games in the Uncategorized list, you can right-click on the entry, e.g., bfginstaller32_s1_l1.exe, and choose Properties and then change the "Shortcut" value to something you prefer, such as "Big Fish Games". When I reopened Steam and started Big Fish Games, I saw the Aquascapes game under "My Games".

[ More Info ]

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

To access a directory that is shared from a Microsoft Windows system in a Windows domain, you can take the following steps on a Ubuntu Linux system. Note: you will need to have a package installed that provides Server Message Block (SMB) support. If the libsmclient0 package is installed, you should be able to use these steps. You can check if it is installed by opening a Terminal window and issuing the command dpkg -s libsmbclient0. If it is not installed, you can install it with sudo apt install libsmbclient0.

alice@Wonderland:~$ dpkg -s libsmbclient0
Package: libsmbclient0
Status: install ok installed
Priority: optional
Section: libs
Installed-Size: 259
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Architecture: amd64
Multi-Arch: same
Source: samba
Version: 2:4.22.3+dfsg-4ubuntu2.2
Replaces: libsmbclient
Provides: libsmbclient (= 2:4.22.3+dfsg-4ubuntu2.2)
Depends: samba-libs (= 2:4.22.3+dfsg-4ubuntu2.2), libbsd0 (>= 0.0), libc6 (>= 2.38), libndr6 (>= 2:4.17.2), libtalloc2 (>= 2.0.4~git20101213), libtevent0t64 (>= 0.15.0)
Breaks: libsmbclient (<< 2:4.22.3+dfsg-4ubuntu2.2)
Description: shared library for communication with SMB/CIFS servers
 This package provides a shared library that enables client applications
 to talk to Microsoft Windows and Samba servers using the SMB/CIFS
 protocol.
Homepage: https://www.samba.org
Original-Maintainer: Debian Samba Maintainers <pkg-samba-maint@lists.alioth.debian.org>
alice@Wonderland:~$

[ More Info ]

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

[/network/web/browser/firefox] permanent link

If you need to list all of the accounts on an Ubuntu Linux system, there are many commands that you can use.

1. cat /etc/passwd
2. grep -oE '^[^:]+' /etc/passwd - for just the account names
3. cut -d: -f1 /etc/passwd - for just the account names
4. awk -F: '{print $1}' /etc/passwd - for just the account names
5. lslogins
6. compgen -u - for just the accunt names
7. getent passwd

[ More Info ]

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

If you need to determine the amount of memory in a system that is running the Ubuntu Linux operating system (OS), you can open a Terminal window from the App Center and then use the free command. If you use the command without any options, you will see the amount of memory displayed in bytes. To display the value in a more human-friendly format, you can add the argument -h or --human, e.g., to see the value in gigabytes.

alice@firefly:~$ free -h
               total        used        free      shared  buff/cache   available
Mem:            14Gi       2.4Gi        10Gi       426Mi       2.3Gi        12Gi
Swap:          4.0Gi          0B       4.0Gi
alice@firefly:~$

Other options for the command are shown below:

jim@Serenity:~$ free --help

Usage:
 free [options]

Options:
 -b, --bytes         show output in bytes
     --kilo          show output in kilobytes
     --mega          show output in megabytes
     --giga          show output in gigabytes
     --tera          show output in terabytes
     --peta          show output in petabytes
 -k, --kibi          show output in kibibytes
 -m, --mebi          show output in mebibytes
 -g, --gibi          show output in gibibytes
     --tebi          show output in tebibytes
     --pebi          show output in pebibytes
 -h, --human         show human-readable output
     --si            use powers of 1000 not 1024
 -l, --lohi          show detailed low and high memory statistics
 -L, --line          show output on a single line
 -t, --total         show total for RAM + swap
 -v, --committed     show committed memory and commit limit
 -s N, --seconds N   repeat printing every N seconds
 -c N, --count N     repeat printing N times, then exit
 -w, --wide          wide output

     --help     display this help and exit
 -V, --version  output version information and exit

For more details see free(1).
jim@Serenity:~$ 

Note:The free command in Linux shows the total amount of installed physical memory in the total column, but this value is less than the actual hardware random-access memory (RAM) installed because the Linux kernel reserves a portion of memory for itself and for hardware devices (like video card buffers) at boot time. The total shown is the usable RAM available to the OS, not the absolute hardware total.

[ More Info ]

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

On a Ubuntu Linux system, you can determine which users are allowed to use the sudo command by looking at the contents of the /etc/group file. If you grep for sudo you will see which accounts on the system can use the command.

jack@firefly:~$ grep sudo /etc/group
sudo:x:27:jack,jill@ad.example.com
jack@firefly:~$ 

The above output shows that the local jack account and a Windows domain account, jill@ad.example.com, can use the command. You can see what groups a particular user belongs to with the command groups username, where username is the user's account name.

jack@firefly:~$ groups jill@ad.example.com
jill@ad.example.com : domain users@ad.example.com ra_allowmediaaccess@ad.example
.com ra_allowcomputeraccess@ad.example.com ra_allowaddinaccess@ad.example.com ra
_allowshareaccess@ad.example.com ra_allowremoteaccess@ad.example.com wssusers@ad
.example.com ra_allowvpnaccess@ad.example.com ra_allowhomepagelinks@ad.example.c
om
jack@firefly:~$ groups jack
jack : jack adm cdrom sudo dip plugdev users lpadmin
jack@firefly:~$

You can also determine if a user has sudo privilege using groups username | grep -c sudo. If the result is 0, then the user does not have that privilege. If the result is 1, inciding that the grep command found username one in the output of the groups command, then the user has that privilege.

jack@firefly:~$ groups jill@ad.example.com | grep -c sudo
1
jack@firefly:~$

You can grant a user that privilege by issuing the command sudo usermod -aG sudo username from an account that already has the capability to run the sudo command.

jack@firefly:~$ sudo usermod -aG sudo mary
[sudo: authenticate] Password:
jack@firefly:~$

You can remove a user's account from the list of those allowed to run the command using the gpasswd command, which is part of the sysutils package by issuing the command sudo gpasswd -d username sudo.

jack@firefly:~$ sudo gpasswd -d mary sudo
Removing user mary from group sudo
jack@firefly:~$ groups mary | grep -c sudo
0
jack@firefly:~$

[ More Info ]

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