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# Linux spell command [ Linux Command Manual](#) The Linux spell command can build a spelling check program. spell can read strings from the standard input device and display misspelled words after finishing. ### Syntax spell ### Example Check if the file testfile has spelling errors, enter the following command at the command line prompt: spell testfile If there are misspelled words in the file, the following information will be output: $ spell testfile #Check testfile for spelling errors scurity #The following are misspelled words tp LANs Securty practicl applcations necesary If the checked file has no misspelled words, then the command will not give any information after running. Check strings read from standard input. For example, enter the following command at the command line: spell After pressing Enter, enter a string, then press Ctrl+D to exit spell, and the misspelled words will be displayed on the screen. As shown below: $ spell #Check the spelling of strings from standard input hell,this is a linx sustem! #String with spelling errors linx #The following are misspelled words sustem [ Linux Command Manual](#)