grep (qualified string matching)
- No-argument: display matching lines
- -c: display the number of matching rows
- -e string: Special string matching, such as - the beginning
- -i: ignore case
- -v: output does not match the line
- -w: matching a specified string
- And other commands can be "|" pipe character connection
- [Grep user_info demo in matching demo file user_info , print it out]
- [Grep - c 0 demo in with demo files 0 , matching print a few lines]
- [Grep - E import demo the matching file to demo the beginning of a data import]
- [Grep - V import demo in the demo file, the matching does not contain all of the data import]
- [PS - EF | grep - v 'grep' | grep httpd matching process in compliance with all of the http process , and the exclusion of grep itself]
find (find find files under the specified directory)
- -name file name matches the name of the file
- -iname file name matches the name of the file to ignore case
- -type file types
- f: General Files
- d: Contents
- [The Find . - name 'demo' find the name of the current directory for the demo file ]
- [The Find . - of the type f find the general file in the current directory]
- [The Find . - of the type d find the directory files in the current directory]
- [The Find / - of the type f - name nginx starting from the root directory to find a name for the general file of nginx]
ocate (find qualified by a database file)
whereis (Find File)
which (to find files in the environment variable)