Example we have many html file:
[root@tutorialspots ok]# ls backup_okru0.html backup_okru_type_432001.html backup_okru1001.html backup_okru_type_432501.html backup_okru1501.html backup_okru_type_433001.html backup_okru2001.html backup_okru_type_433501.html backup_okru2501.html backup_okru_type_434001.html backup_okru3001.html backup_okru_type_434501.html backup_okru3501.html backup_okru_type_435001.html backup_okru4001.html backup_okru_type_43501.html backup_okru4501.html backup_okru_type_435501.html backup_okru5001.html backup_okru_type_436001.html backup_okru501.html backup_okru_type_436501.html backup_okru5501.html backup_okru_type_437001.html backup_okru6001.html backup_okru_type_437501.html backup_okru6501.html backup_okru_type_438001.html backup_okru7001.html backup_okru_type_438501.html backup_okru7501.html backup_okru_type_439001.html backup_okru8001.html backup_okru_type_439501.html backup_okru8501.html backup_okru_type_440001.html backup_okru_type_40.html backup_okru_type_44001.html backup_okru_type_410001.html backup_okru_type_440501.html backup_okru_type_41001.html backup_okru_type_441001.html backup_okru_type_410501.html backup_okru_type_441501.html backup_okru_type_411001.html backup_okru_type_442001.html backup_okru_type_411501.html backup_okru_type_442501.html backup_okru_type_412001.html backup_okru_type_443001.html backup_okru_type_412501.html backup_okru_type_443501.html backup_okru_type_413001.html backup_okru_type_444001.html backup_okru_type_413501.html backup_okru_type_444501.html backup_okru_type_414001.html backup_okru_type_445001.html backup_okru_type_414501.html backup_okru_type_44501.html backup_okru_type_415001.html backup_okru_type_445501.html backup_okru_type_41501.html backup_okru_type_446001.html backup_okru_type_415501.html backup_okru_type_446501.html backup_okru_type_416001.html backup_okru_type_447001.html backup_okru_type_416501.html backup_okru_type_447501.html backup_okru_type_417001.html backup_okru_type_448001.html backup_okru_type_417501.html backup_okru_type_448501.html backup_okru_type_418001.html backup_okru_type_449001.html backup_okru_type_418501.html backup_okru_type_449501.html backup_okru_type_419001.html backup_okru_type_450001.html backup_okru_type_419501.html backup_okru_type_45001.html backup_okru_type_420001.html backup_okru_type_4501.html backup_okru_type_42001.html backup_okru_type_450501.html backup_okru_type_420501.html backup_okru_type_451001.html backup_okru_type_421001.html backup_okru_type_451501.html backup_okru_type_421501.html backup_okru_type_452001.html backup_okru_type_422001.html backup_okru_type_452501.html backup_okru_type_422501.html backup_okru_type_453001.html backup_okru_type_423001.html backup_okru_type_453501.html backup_okru_type_423501.html backup_okru_type_454001.html backup_okru_type_424001.html backup_okru_type_454501.html backup_okru_type_424501.html backup_okru_type_455001.html backup_okru_type_425001.html backup_okru_type_45501.html backup_okru_type_42501.html backup_okru_type_455501.html backup_okru_type_425501.html backup_okru_type_456001.html backup_okru_type_426001.html backup_okru_type_456501.html backup_okru_type_426501.html backup_okru_type_457001.html backup_okru_type_427001.html backup_okru_type_457501.html backup_okru_type_427501.html backup_okru_type_46001.html backup_okru_type_428001.html backup_okru_type_46501.html backup_okru_type_428501.html backup_okru_type_47001.html backup_okru_type_429001.html backup_okru_type_47501.html backup_okru_type_429501.html backup_okru_type_48001.html backup_okru_type_430001.html backup_okru_type_48501.html backup_okru_type_43001.html backup_okru_type_49001.html backup_okru_type_430501.html backup_okru_type_49501.html backup_okru_type_431001.html backup_okru_type_431501.html
How to join them into one file?
cat *.html > ok.txt
