Shell Find

Print filepath

$ find . -print

This command use '\n' as the div.

$ find . -print0

The -print0 means use '\0' as div.

Example:

lucient@lucient-X405UA:~/Downloads$ find . -print
.
./Anaconda3-4.4.0-Linux-x86_64.sh.part
./scriptfifo
./script1_1.sh
./output.session
./out.txt
./tmp.txt
./timing.log
lucient@lucient-X405UA:~/Downloads$ find . -print0
../Anaconda3-4.4.0-Linux-x86_64.sh.part./scriptfifo./script1_1.sh./output.session./out.txt./tmp.txt./timing.loglucient@lucient-X405UA:~/Downloads$ 
lucient@lucient-X405UA:~/Downloads$ 

Find filename using regexp

lucient@lucient-X405UA:~/Downloads$ find . -name "*.txt" -print
./out.txt
./tmp.txt

If use -iname means ignore capital case.

Find filepath

lucient@lucient-X405UA:~/Downloads$ find / -path  "*home.d*" -print
find: ‘/boot/efi’: Permission denied
find: ‘/sys/kernel/debug’: Permission denied
find: ‘/sys/fs/fuse/connections/8388630’: Permission denied
find: ‘/sys/fs/fuse/connections/8388628’: Permission denied
find: ‘/sys/fs/fuse/connections/8388629’: Permission denied
find: ‘/lost+found’: Permission denied
find: ‘/tmp/systemd-private-65221f602c0344458e17bc814c1cd212-colord.service-ovcLg0’: Permission denied
find: ‘/tmp/systemd-private-65221f602c0344458e17bc814c1cd212-rtkit-daemon.service-sYTC6U’: Permission denied
find: ‘/tmp/systemd-private-65221f602c0344458e17bc814c1cd212-systemd-timesyncd.service-kfuu0s’: Permission denied
/usr/share/app-install/desktop/caja:caja-home.desktop
/usr/share/applications/nautilus-home.desktop
^C
lucient@lucient-X405UA:~/Downloads$ 

The -regex is like -path, it use regular expression

lucient@lucient-X405UA:~/Downloads$ find . -regex ".*\(\.txt\|\.sh\)$"
./script1_1.sh
./out.txt
./tmp.txt

Negation Find

Use ! to negation find file
example find file whose name is not end with .txt

lucient@lucient-X405UA:~/Downloads$ find . ! -name "*.txt" -print
.
./Anaconda3-4.4.0-Linux-x86_64.sh.part
./scriptfifo
./script1_1.sh
./output.session
./timing.log
lucient@lucient-X405UA:~/Downloads$ 

Set search fold maxdepth mindepth

Using

... -maxdepth n # n is number

set the max search depth
Using

... -mindepth n # n is number

set the minimum search depth

Find according file type

lucient@lucient-X405UA:~/Downloads$ find . -type f -print
./Anaconda3-4.4.0-Linux-x86_64.sh.part
./script1_1.sh
./output.session
./out.txt
./tmp.txt
./timing.log
lucient@lucient-X405UA:~/Downloads$ 

Table of file type

FileType	Parameter
normal file	f
link symbol	l
directory	d
char device	c
block device	b
socket	s
Fifo	p

Find file according time

Table of time parameters

time	paramteter [unit is day]	parameter [unit is min]
last access time	-atime	-amin
last modify time	-mtime	-mmin
last authority modify	-ctime	-cmin

*Example

lucient@lucient-X405UA:~/Downloads$ find . -type f -atime 7 -print
lucient@lucient-X405UA:~/Downloads$ find . -type f -atime -7 -print
./Anaconda3-4.4.0-Linux-x86_64.sh.part
./script1_1.sh
./output.session
./out.txt
./tmp.txt
./timing.log
lucient@lucient-X405UA:~/Downloads$ find . -type f -atime +7 -print
lucient@lucient-X405UA:~/Downloads$ 

Note

7 means modify is just happened seven days ago[range is one day]
+7 means modify is happened seven days before[range is many days]
-7 means modify is happened within seven days

Find according file size

lucient@lucient-X405UA:~/Downloads$ find . -size +2k
.
./Anaconda3-4.4.0-Linux-x86_64.sh.part
lucient@lucient-X405UA:~/Downloads$ find . -size -2k
./scriptfifo
./script1_1.sh
./out.txt
./tmp.txt
./timing.log
lucient@lucient-X405UA:~/Downloads$ find . -size 2k
./output.session
lucient@lucient-X405UA:~/Downloads$ 

The size unit table

parameter	unit
b	block
c	byte
w	word
k	kB
M	MB
G	GB

Find and delete

lucient@lucient-X405UA:~/Downloads$ ls
Anaconda3-4.4.0-Linux-x86_64.sh.part  out.txt       timing.log
deletedemo.txt                        script1_1.sh  tmp_sum.md5
output.session                        scriptfifo    tmp.txt
lucient@lucient-X405UA:~/Downloads$ find . -name "deletedemo.*" -delete 
lucient@lucient-X405UA:~/Downloads$ ls
Anaconda3-4.4.0-Linux-x86_64.sh.part  out.txt       scriptfifo  tmp_sum.md5
output.session                        script1_1.sh  timing.log  tmp.txt

Find according authority

lucient@lucient-X405UA:~/Downloads$ ll
total 34496
drwxr-xr-x  2 lucient lucient     4096 9月  19 20:24 ./
drwxr-xr-x 19 lucient lucient     4096 9月  19 20:20 ../
-rw-------  1 lucient lucient 35290070 9月  19 20:23 Anaconda3-4.4.0-Linux-x86_64.sh.part
-rw-rw-r--  1 lucient lucient     1120 9月  18 20:33 output.session
-rw-rw-r--  1 lucient lucient      167 9月  19 04:15 out.txt
-rwxrwxr-x  1 lucient lucient       50 9月  18 20:29 script1_1.sh*
prw-rw-r--  1 lucient lucient        0 9月  18 20:56 scriptfifo|
-rw-rw-r--  1 lucient lucient      566 9月  18 20:33 timing.log
-rw-rw-r--  1 lucient lucient       42 9月  18 21:48 tmp_sum.md5
-rw-rw-r--  1 lucient lucient       51 9月  19 04:10 tmp.txt
lucient@lucient-X405UA:~/Downloads$ find . -type f -perm 664 -print
./output.session
./tmp_sum.md5
./out.txt
./tmp.txt
./timing.log
lucient@lucient-X405UA:~/Downloads$ find . -type f -perm 662 -print
lucient@lucient-X405UA:~/Downloads$ find . -type f -perm 775 -print
./script1_1.sh

Find and exec command

lucient@lucient-X405UA:~/Downloads$ find . -name "*.txt" -exec cat {}
find: missing argument to `-exec'
lucient@lucient-X405UA:~/Downloads$ find . -name "*.txt" -exec cat {}\;
find: missing argument to `-exec'
lucient@lucient-X405UA:~/Downloads$ find . -name "*.txt" -exec cat {} \;
this is a sample text
this is a sample text line2 
this is a sample text
this is a sample text line2 
     1  this is a sample text
     2  this is a sample text line2 
this is a sample text
this is a sample text line2 
lucient@lucient-X405UA:~/Downloads$ ls
Anaconda3-4.4.0-Linux-x86_64.sh.part  out.txt       scriptfifo  tmp_sum.md5
output.session                        script1_1.sh  timing.log  tmp.txt
lucient@lucient-X405UA:~/Downloads$ cat out.txt 
this is a sample text
this is a sample text line2 
this is a sample text
this is a sample text line2 
     1  this is a sample text
     2  this is a sample text line2 
lucient@lucient-X405UA:~/Downloads$ cat tmp.txt 
this is a sample text
this is a sample text line2