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Developer tools · #ubuntu
Guide to installing Snaps, managing interfaces, controlling update timing, and rolling back updates on Ubuntu LTS.
Diagnose and resolve failures in Ubuntu's unattended‑upgrades service, covering lock contention, network issues, stale APT lists, and configuration errors for LTS releases.
Learn how to implement a default-deny network policy on Ubuntu Server using UFW to block unauthorized access while maintaining SSH and web service connectivity.
Learn how to install ZFS, create a storage pool, enable compression, and take instantaneous snapshots on Ubuntu 22.04 LTS, with caveats about hardware and performance.
Ubuntu Kernel Livepatch can defer reboots for select kernel security fixes on supported stock kernels, but it is not a replacement for reboots or user space updates. Check release, HWE kernel series, and client status before relying on it.
Learn how Ubuntu's Netplan abstracts network configuration for systemd‑networkd and NetworkManager, and how to safely apply static IP settings using 'netplan try'.
When I try to open psql with this command: psql -U postgres I get this error: psql: error: connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: FATAL: Peer authentication failed for user "postgres" But it connects successfully when I use: sudo -u postgres psql Can someone please explain what is happening and how to diagnose/fix this pro
Here is My Dockerfile: FROM ubuntu:20.04 RUN apt-get update && apt-get upgrade -y RUN apt-get install libssl-dev RUN apt-get install -y -q build-essential curl RUN curl https://sh.rustup.rs -sSf | sh -s -- -y ENV PATH="/root/.cargo/bin:${PATH}" WORKDIR /command-agent COPY . /command-agent RUN cargo build --release COPY /command-agent/target/release/c
I recently upgraded my OS to Ubuntu 20.04 LTS. Now when I try to import a library like Numpy in Python, I get the following error: ImportError: libffi.so.6: cannot open shared object file: No such file or directory I tried installing the libffi package, but apt can't locate it: sudo apt-get install libffi Reading package lists... Done Building dependency tre
postgresql
rust
python