Summary
journalctl is a command that’s used to identify many errors and for troubleshooting purposes. It’s an essential way of solving any issues with your Linux system.
Qjournalctl offers a handy graphical frontend for systemd’s journalctl command. It inevitably lacks some of the flexibility of journalctl, but it’s an eminently practical way of troubleshooting that can save some time.
Website: github.com/pentix/qjournalctl
Support:
Developer: Patrick Eigensatz with contributions by Simon Doppler
Qjournalctl is written in C++. Learn C++ with our recommended free books and free tutorials.
Pages in this article:
Page 1 – Introduction / Installation
Page 2 – In Operation
Page 3 – Other Features
Page 4 – Summary
All the essential tools in this series:
| Essential System Tools | |
|---|---|
| ps_mem | Accurate reporting of software's memory consumption |
| gtop | System monitoring dashboard |
| pet | Simple command-line snippet manager |
| Alacritty | Innovative, hardware-accelerated terminal emulator |
| inxi | Command-line system information tool that's a time-saver for everyone |
| BleachBit | System cleaning software. Quick and easy way to service your computer |
| catfish | Versatile file searching software |
| journalctl | Query and display messages from the journal |
| Nmap | Network security tool that builds a "map" of the network |
| ddrescue | Data recovery tool, retrieving data from failing drives as safely as possible |
| Neofetch | System information tool written in Bash |
| Timeshift | Similar to Windows' System Restore functionality, Time Machine Tool in Mac OS |
| GParted | Resize, copy, and move partitions without data |
| Clonezilla | Partition and disk cloning software |
| fdupes | Find or delete duplicate files |
| Krusader | Advanced, twin-panel (commander-style) file manager |
| nmon | Systems administrator, tuner, and benchmark tool |
| f3 | Detect and fix counterfeit flash storage |
| QJournalctl | Graphical User Interface for systemd’s journalctl |
| QDirStat | Qt-based directory statistics |
| Firejail | Restrict the running environment of untrusted applications |
| VeraCrypt | Strong disk encryption software |
| Unison | Console and graphical file synchronization software |
| hyperfine | Command-line benchmarking tool |
| TLP | Must-have tool for anyone running Linux on a notebook |
| nnn | Portable terminal file manager that's amazingly frugal |
| Glances | Cross-platform system monitoring tool written in Python |
| CPU-X | System profiler with both a GUI and text-based |
| Ventoy | Create bootable USB drive for ISO/WIM/IMG/VHD(x)/EFI files |
| Fail2ban | Ban hosts that cause multiple authentication errors |
I always appreciate in your reviews that you try out the software and display relevant screenshots which can be critical in deciding the usefulness of some software item.
I would have thought that in the listing of all messages (and yes you pointed out that you can filter by log level) that critical messages should be in bright red, alerts in yellow etc in order to draw attention to them. And sometimes in tracking critical/alerts priority warnings it is useful to see the lower priority messages before them because they can be a clue as to why the serious incident occurred.