When comparing pcmanfm-qt vs WCM Commander, the Slant community recommends WCM Commander for most people. In the question“What are the best file managers for UNIX-like systems?” WCM Commander is ranked 27th while pcmanfm-qt is ranked 36th. The most important reason people chose WCM Commander is:
Has a built-in terminal from which users can run any kind of command.
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Pros
Pro Can open folder as root
PCManFM can open different folders as root, this way you don't have to use the terminal to move around files for which you need root permission.
Pro Simple
PCManFM is a very lightweight and simple file manager.
Pro Has a lot of features
... that only Dolphin, Krusader, Nemo & Nautilus has onboard -
but this one is a small footprint reliable friend.
Pro Built-in terminal
Has a built-in terminal from which users can run any kind of command.
Pro Virtual file system
WCM Commander has a virtual file system for smb, ftp and sftp.
Pro Built-in editor
WCM Commander has a built-in text editor with syntax highlighting included.
Cons
Con Some operations are slow
Because it tries to be as lightweight as possible and tries to use very little RAM. This can unfortunately lead to it being slow sometimes.
Con File editing on virtual file systems not supported
You cannot edit files in the virtual file system.