Is There A UNIX / Linux Unerase / Undelete Command?

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Is There a UNIX / Linux unerase or undelete command? How do I undelete files under a UNIX / Linux system?

 Short answer - no.

There is no “unerase” or “undelete” command in Linux / *BSD / Unix like operating system such as AIX or HP-UX . The best solution is to restore file from a backup. You can also use a data recovery tool but there is no guaranty you will get back the data. Always use following method to avoid problems:
- Make regular backups and file system snapshots
- Never ever login as root for non admin related tasks
- Always use a regular user account for all normal tasks
- Alias rm / mv / cp command as rm -i / mv -i
alias cp='cp -i'
alias mv=’mv -i’
alias rm=’rm -i’
- Make important file copy before editing
- Use RAID 6 or above hardware card as additional protection for file server
- Keep files safe from accidental overwriting with noclobber under BASH shell
- Make a Linux File unchangeable ( unalterable ) so that no one can modify it - including root user