The method of judging the existence of a file or directory by linux through if statement
Catalog judgment:
Path= "/ home" # if [!-d ${path}]; then if [- d ${path}]; then echo dir ${path} exist! Else echo dir ${path} not exist! Fi
Document judgment:
File= "/ home/log.txt" if [- f ${file}]; then echo file ${file} exist! Else echo file ${file} not exist! Fi
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