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| badblocks | scan device for bad blocks |
| blockdev | check some block device parameters |
| cgdisk | ncurses partition manager (gdisk frontend) |
| df | show free space |
| findmnt | show mounts |
| f3 | Utilities to detect and repair counterfeit flash storage |
| iostat | I/O statistics |
| iotop | I/O process statistics |
| ncdu | ncurses disk usage |
| vmtouch | learning about and controlling the file system cache |
| ranger | CLI file manager with vi-like keybinds |
| sar | from package sysstat, collects and reports system activity information |
| jdupes | find duplicates and deduplicate them with Btrfs |
| wipe | delete and overwrite files and folders in a secure manner |
| imapsync | copy IMAP mails around |
| swaks | Swiss Army Knife for SMTP |
| git | Git code management |
| imagemagick | image processing |
| man | show manuals (manpages) |
| tar | pack files into "tape archives" |
| shellcheck | check shell scripts for errors |
| date | show date |
| exiftool | view (image) file information |
| pev | PE32 file analysis |