Ubuntu/24

NTP

systemctl status systemd-timesyncd

/etc/systemd/timesyncd.conf
 [Time]
 NTP=ntp.example.com

/etc/systemd/timesyncd.conf.d/

systemctl stop systemd-timesyncd
systemctl start systemd-timesyncd

---

One-shot sync:

chronyd -q

One-shot time check:

chronyd -Q

root@IRV-CI-101:~/pbis-open-9.1.0.551.linux.x86_64.deb# chronyd -q
Command 'chronyd' not found, but can be installed with:
apt install chrony
root@IRV-CI-101:~/pbis-open-9.1.0.551.linux.x86_64.deb# ntpdate
Command 'ntpdate' not found, but can be installed with:
apt install ntpsec-ntpdate

About time synchronisation | Ubuntu
https://ubuntu.com/server/docs/about-time-synchronisation

Dual Boot - Remember Last Choice

dual boot - How to get grub2 to remember last choice? - Ask Ubuntu - http://askubuntu.com/questions/148662/how-to-get-grub2-to-remember-last-choice

Ubuntu:

/etc/default/grub:

GRUB_DEFAULT=saved
GRUB_SAVEDEFAULT=true

then run:

sudo update-grub

pip install

root@~# pip3 install [PACKAGE]
error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
    python3-xyz, where xyz is the package you are trying to
    install.

    If you wish to install a non-Debian-packaged Python package,
    create a virtual environment using python3 -m venv path/to/venv.
    Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
    sure you have python3-full installed.

    If you wish to install a non-Debian packaged Python application,
    it may be easiest to use pipx install xyz, which will manage a
    virtual environment for you. Make sure you have pipx installed.

    See /usr/share/doc/python3.12/README.venv for more information.

note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.

sudo apt install python3-venv

sudo python3 -m venv .pyadmin
. .pyadmin/bin/activate
# do the things
# python -m pip install [package]
deactivate

Or

cd /opt
sudo python3 -m venv /opt/pyadmin
sudo /opt/pyadmin/bin/python -m pip install [package]

Or

sudo sh -c ". venv/bin/active ; pypi-install $PACKAGE"