Command for searching strings in linux

1. the set command displays the definitions and values of all global parameters in the current shell. 2. find and delete small files in the current directory: find. -type f-size-10 k-exec rm {}\; Description: www.2cto.com-type f: Find the file-size-10 k, less than 10 k. "+" Indicates that only files larger than the specified size are listed, and "-" indicates that files smaller than the specified size are listed. 3. traverse the grep folder. find.-name "* c" | xargs grep "strings" searches for the string "string" in all c files in the current folder"
4. search for a string grep-r youcode dir in a file in a directory. For example, search for hellogrep-r hello/home in a file in home. For example, search for "hello" in all files in the current directory, case Insensitive grep-ir hello. www.2cto.com searches the row matching the specified string from the file content: $ grep "searched string" file name searches the row matching the regular expression from the file content: $ grep-e "Regular Expression" the name of the file is case-insensitive during query: $ grep-I "the string to be searched" the number of matched lines to be searched by the file name: www.2cto.com $ grep-c "searched string" the file name searches for rows that do not match the specified string from the file content: $ grep-v "searched string" the file name starts from the root directory to search for all extensions. log text file, and find the line that contains "ERROR" by gzh0222