Changing the Default Terminal to Terminator on Ubuntu

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Terminator is a powerful tool for developers, allowing you to manage multiple terminal sessions in a single window. Features like splitting panes, tabs, and simultaneous input can significantly boost your productivity. Step 1: Install Terminator First, install Terminator using the apt package manager. sudo apt update sudo apt install terminator -y The -y option automatically answers 'yes' to any prompts during the installation process, streamlining the setup. Step 2: Set as the System Default Ubuntu uses a utility called update-alternatives to manage default applications. We'll use this tool to change the default terminal emulator ( x-terminal-emulator ) to Terminator. Run the Configuration Command Enter the following command in your terminal. A list of available terminals will appear. sudo update-alternatives --config x-terminal-emulator Select Terminator From the resulting list, enter the selection number corresponding to terminator and press Enter. ...
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Disable Wi-Fi Power Saving on Ubuntu for fast access to SSH, Telnet, and FTP

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If you've noticed that SSH connections become very slow or unresponsive after your Ubuntu laptop has been idle for a while. This often happens because your Wi-Fi card enters power-saving mode, reducing network activity until it's manually "woken up."

Here's how to check and disable Wi-Fi power management to ensure fast access to services like SSH, Telnet, and FTP.

Step 1: Identify Your Network Interface

Run the following command to find your WiFi network interface:

$ iw dev
phy#0
        Interface wlp3s0
                ifindex 3
                wdev 0x1
                addr d4:d2:52:96:ff:6e
                ssid ABCD1234

Here, wlp3s0 is your Wi-Fi interface name. You'll use this in the following steps.

Step 2: Check Power Management Status

Use iwconfig to check if power saving is enabled:

$ iwconfig wlp3s0
wlp3s0     IEEE 802.11  ESSID:"ABCD1234"
Mode:Managed  Frequency:5.26 GHz  Access Point: 38:06:E6:28:76:75
Tx-Power=22 dBm
Retry short limit:7   RTS thr:off   Fragment thr:off
Power Management:on
Link Quality=65/70  Signal level=-45 dBm
Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
Tx excessive retries:7  Invalid misc:2548  Missed beacon:0

If you see `Power Management: on`, then your Wi-Fi card is going to sleep when idle and it causes the SSH delay.


Step 3: Disable Power Management Temporarily

To turn off power-saving mode immediately (for the current session), execute the following command.

$ sudo iwconfig wlp3s0 power off


Step 4: Disable Power Management Permanently

When using NetworkManager as a renderer

1. Edit NetworkManager's default-wifi-powersave-off.conf

$ sudo vim /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
[connection]
wifi.powersave = 2
Value Identifier Description Use Case
0 NM_SETTING_WIFI_POWERSAVE_DEFAULT Default setting (depends on internal policy or driver) When you don't want to customize the setting
1 NM_SETTING_WIFI_POWERSAVE_ENABLED Enable power saving mode When saving power is important (e.g., on laptops)
2 NM_SETTING_WIFI_POWERSAVE_DISABLED Disable power saving mode When connection stability is important (e.g., avoid SSH timeouts)
3 NM_SETTING_WIFI_POWERSAVE_IGNORE Ignore this setting and follow system defaults When you prefer to rely on system defaults

2. Restart NetworkManager

$ sudo systemctl restart NetworkManager

Step 5: Check Power Management Status after Reboot

$ iwconfig wlp3s0
wlp3s0     IEEE 802.11  ESSID:"ABCD1234"
Mode:Managed  Frequency:5.26 GHz  Access Point: 38:06:E6:28:76:75
Tx-Power=22 dBm
Retry short limit:7   RTS thr:off   Fragment thr:off
Power Management:off (*)
Location: Calgary, AB, Canada

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