Detailed usage of Linux text search command find

The find command is mainly used to find directories and files, and you can specify multiple parameters for matching.

Usage: find +查找路徑 +命令參數 [輸出形式]

Search path: Tell find where to search

Command parameters: specify the file attributes to be searched, including various attributes, such as type, name, size, modification time, etc.

Commonly used parameters:

• -name Search by file name
• -user Search by file owner
• -mtime searches by file modification time, -n means the file modification time is within n days from today, +n means the file modification time is more than n days from today
• -type Search by file type, d means directory, f means file, l means symbolic link file
• -size Search by file size (need to add units, K, M, G), +n M means to search for files larger than n M
• -maxdepth specifies the maximum depth when searching for files (the default is to search in all subdirectories under the specified path. After specifying the depth, you can now search only in the first-level directory or the second-level directory)

Output format: The output format is optional. The output formats include -print to print the found content (the default is to print the found content, so it is generally not used), and -exec to further process the found content (more commonly used). The format is:

-exec Linux command {} \; {} represents the found content

Examples:

find . -maxdepth 1 -name "1.txt" # Directly specify the file name to search, -maxdepth 1 means the maximum search level is the first-level directory 

find . -maxdepth 1 -name "*.txt" # Search for files ending with .txt in the current directory 

find . -maxdepth 1 -name "[0-9].txt" # Find txt files named with numbers 

find . -maxdepth 1 -name "[0-9]*.txt" # Find files starting with a number 

find . -maxdepth 1 -mtime -5 # Find files in the current directory that have been modified within 5 daysfind . -maxdepth 1 -mtime +5 # Find files in the current directory that have been modified more than 5 daysfind . -maxdepth 1 -type d # Find files of type directory in the current directory, with a maximum search level of one directory (hidden directories will be found) 

find . -maxdepth 1 -size +10M # Find files larger than 10M in the current directory find . -maxdepth 1 -size -1M # Find files smaller than 1M in the current directory 

find . -maxdepth 1 -name "[az].txt" -exec rm -rf {} \; # Find txt files named with one letter and delete them find . -maxdepth 1 -name "*.txt" | xargs grep "error" # Print the content of the line with error in the file ending with txt find . -maxdepth 1 -name "*.txt" | xargs rm # Delete files ending with txt in the current directory

xargs passes the execution results of the command before the pipeline as parameters one by one to the command after the pipeline

ls [az].txt | xargs -n1 -i{} mv {} {}.bak # Add a .bak suffix to the txt files named with a single letter in the current directory. -n1 means to process objects one by one. -i{} replaces the previous object with {}. mv {} {}.bak is equivalent to mv a.txt a.txt.bak 

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