Terminal user interface for journalctl, file system logs, as well Docker and Podman containers for quick viewing and filtering with fuzzy find and regex support (like fzf and grep), written in Go with the awesome-gocui (fork gocui) library.

This tool is inspired by and with love for lazydocker and lazygit.

• View all system and user units logs via journalctl (tool for reading logs using journald from systemd).
• List of all system boots for kernel log output.
• File system logs from /var/log (for example, for Apache or Nginx), as well as syslog, dmesg (kernel) and user authentication (wtmp and btmp) sorted by modification date.
• View all log files in the home directories of users and root.
• Reading archived logs in gz format.
• Podman, Docker containers and Swarm services logs.
• Displays the currently selected log (when loading a log, a delimiter with loading time is displayed) and filters output in real-time.

Supports 3 filtering modes:

• Default - case sensitive exact search.
• Fuzzy - imprecise case-insensitive search (searches for all phrases separated by a space anywhere in the string).
• Regex - search with regular expression support, case insensitive by default (in case a regular expression syntax error occurs, the input field will be highlighted in red).

Regex mode uses the built-in regexp library, which is resource-intensive when filtering several tens of thousands of lines, so when switching modes, a limit of 50k lines is applied (for other modes the default is 200k lines), but this number can be changed using the buttons Left/Right in the log output window (maximum 300k lines).

This is an up-to-date roadmap in addition to the functionality described above.

• MacOS support for launchd (issue #1).
• Windows support (Windows Events via PowerShell and log files from Program Files and others directories).
• Syntax coloring for logging output (like tailspin).
• Interface for scrolling and mouse support.
• Support remote machines via ssh protocol.

Binaries for the Linux operating system are available on the releases page.

Development is done on the Ubuntu Server system, also tested in WSL environment on Debian system (x64 platform) and Raspberry Pi (aarch64 platform).

Run the command in your console to quickly install or update:

curl https://raw.githubusercontent.com/Lifailon/lazyjournal/main/install.sh | bash

This command will run a script that will download the latest executable from the GitHub repository into your current user's home directory along with other executables (or create a directory) and grant execution permission.

You can also use Go for installation. To do this, the Go interpreter must be installed on the system, for example, in Ubuntu you can use the SnapCraft package manager:

sudo snap install go --classic
grep -F 'export PATH=$PATH:$HOME/go/bin' $HOME/.bashrc || echo 'export PATH=$PATH:$HOME/go/bin' >> $HOME/.bashrc && source $HOME/.bashrc

go install github.com/Lifailon/lazyjournal@latest

You can launch the interface anywhere (no parameters are used):

lazyjournal

Access to all system logs and containers may require elevated privileges for the current user.

Windows and MacOS is not currently supported, but the project will work to access Docker and Podman containers logs.

Clone the repository, install dependencies from go.mod and run the project:

git clone https://github.com/Lifailon/lazyjournal
cd lazyjournal
go mod tidy
go run main.go

Building the executable files for different platforms:

bash build.sh

• Tab - switch between windows.
• Shift+Tab - return to previous window.
• Left/Right - switch between log lists in the selected window.
• Enter - selection a journal from the list to display log.
• Up/Down - move up or down through all journal lists and log output, as well as changing the filtering mode in the filter window.
• <Shift/Alt>+<Up/Down> - quickly move up or down (every 10 or 500 lines) through all journal lists and log output.
• Ctrl+R - refresh the current log manually and go to the bottom of the output.
• Ctrl+<D/W> - clear text input field for filter to quickly update current log output without filtering.
• Ctrl+C - exit.

• lnav - The Logfile Navigator is a log file viewer for the terminal.
• Dozzle - is a small lightweight application with a web based interface to monitor Docker logs.

If you like using TUI tools, try multranslate for translating text in multiple translators simultaneously, with support for translation history and automatic language detection.