Shell Programming [series] https://blog.csdn.net/ilo114/article/category/8961526
High frequency parameters:
-name Find the file name
Find / etc directory ending in conf file
find /etc -name '*conf'
Find -iname ignore case based on the file name
Find the file named abc file in the current directory, and case-insensitive
find ./ -iname abc
According to their user -user Find
Find the current directory for the file owner testuser file
find ./ -user testuser
Find -group according to user group
Find the file is a work group of all files
find . -group work
Depending on the type -type Find
- f file find. -type f
- d directory find. -type d
- c character device file find. -type c
- b block device file find. -type b
- l linked file find. -type l
- p pipe file find. -type p
Depending on the size -size Find
- n -n smaller than the size of the file
- + N is greater than n files smaller than
Example 1: Find File 10000 bytes less than the / etc directory
find /etc -size -10000c
Example 2: Find the files larger than 1M / etc directory
find /etc -size +1M
-mtime file changes according to time to find (days)
- Within days of modified files -nn
- + Modified files other than nn days
- n exactly n days to modify file
Example 1: Find / Modify conf and at the end of 5 days etc directory files
find /etc -mtime -5 -name '*.conf'
Example 2: Find / modified owner etc directory and 10 days before the root file
find /etc -mtime +10 -user root
-mmin change depending on the file to find the time (minutes)
- -Nn modified files within minutes
- + Modified files other than nn minutes
Example 1: Find files modified 30 minutes before the / etc directory
find /etc -mmin +30
Example 2: Find modifications within 30 minutes of the / etc directory directory
find /etc -mmin -30 -type d
-mindepth n represents the n-level subdirectory Find
Example 0: 3 level in a subfolder of / etc Start Search
find /etc -mindepth 3
-maxdepth n n represents up to find a subdirectory level
Example 1: / etc files under Searching for qualifying, but the most searched subdirectory level 2
find /etc -maxdepth 3 -name '*.conf'
Example 2:
find ./etc/ -type f -name '*.conf' -size +10k -maxdepth 2
Learn parameters:
Find -nouser not belong to the user's home
find . -type f -nouser
-nogroup Find user belongs to no group
find . -type f -nogroup
Find -perm based on user permissions
find . -perm 664
-prune exclude specific directories to find
- It is usually used with -path, for specific directory search criteria exclude
Example 1: Find the current all common file directory, but exclude the test directory
find . -path ./etc -prune -o -type f
Example 2: Find all the ordinary files in the current directory, but exclude etc, and opt directory
find . -path ./etc -prune -o -path ./opt -prune -o -type f
Example 3: Find all the ordinary files in the current directory, but exclude etc, and opt directory, but the owner is hdfs
find . -path ./etc -prune -o -path ./opt -prune -o -type f -a -user hdfs
Example 4: Find the current directory of all common files, etc, and opt excluding directories, but is owned by the HDFS, and the file size must be larger than 500 bytes
find . -path ./etc -prune -o -path ./opt -prune -o -type f -a -user hdfs -a -size +500c
-newer file1
find /etc -newer a
operating:
-print print output
-exec perform specific operations on the searched file format -exec 'command' {};
Example 1: Search / file (non-directory) under etc, files ending in conf, and greater than 10k, and then delete it
find ./etc/ -type f -name '*.conf' -size +10k -exec rm -f {} \;
Example 2: under / var / log / directory to the end of the log file, delete and change the time more than 7 days
find /var/log/ -name '*.log' -mtime +7 -exec rm -rf {} \;
Example 3: 1 search criteria and examples of the same, but does not remove, but to copy it to / root / conf directory
find ./etc/ -size +10k -type f -name '*.conf' -exec cp {} /root/conf/ \;
-ok and exec function the same, but each operation will give users tips
Logical Operators:
-a and
-o or
-not |! non
Example 1: Find the current directory, not the owner of all files hdfs
find . -not -user hdfs | find . ! -user hdfs
File search the current directory, is the main part of HDFS, and has a size larger than 300 bytes: Example 2
find . -type f -a -user hdfs -a -size +300c
Example 3: Find the owner in the current directory hdfs or xml files ending with the ordinary
find . -type f -a \( -user hdfs -o -name '*.xml' \)
