Top Forums Shell Programming and Scripting Increase the performance of find command. Post 303041944 by RudiC on Saturday 7th of December 2019 12:00:54 PM
File sizes are included in my cksum. For climbing down the dir tree, try
cksum * */* */*/* |& grep -v "BACKUP\|STORE\|LOGGER\|cksum"
268795035 355 file1
113460914 19 file2

Test Your Knowledge in Computers #724
Difficulty: Medium
The Plan 9 operating system was the first machine to achieve a Master rating in chess.
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find(1) 						      General Commands Manual							   find(1)

       find - find files

       find pathname-list  expression

       The  command  recursively  descends the directory hierarchy for each pathname in the pathname-list (that is, one or more pathnames) seeking
       files that match a boolean expression written in the primaries given below.  In the descriptions, the argument n is used as a decimal inte-
       ger where +n means more than n, -n means less than n , and n means exactly n.

       -atime n       Tests true if the file has been accessed in n days.

       -cpio output   Writes current file on output in the format (5120-byte records) specified in the reference page.	The output can be either a
		      file or tape device.  If output is a tape device the B key must be used to read data from the tape.

       -ctime n       Tests true if the file has been changed in n days.

       -depth	      Always true; causes descent of the directory hierarchy to be done so that all entries in a directory are acted on before the
		      directory  itself (that is, postorder instead of preorder).  This can be useful when is used with to transfer files that are
		      contained in directories without write permission.

       -exec command  Tests true if specified command returns a 0 on exit.  The end of the command must be punctuated by an escaped semicolon.	 A
		      command argument `{}' is replaced by the current pathname.

       -group gname   Tests true if group ID matches specified group name.

       -inum n	      Tests true if the file has inode number n.

       -links n       Tests true if the file has n links.

       -mount	      Tests true if the current file is on the same file system as the current starting pathname.

       -mtime n       Tests true if the file has been modified in n days.

       -name filename Tests  true  if  the  filename  argument matches the current file name.  Normal Shell argument syntax may be used if escaped
		      (watch out for `[', `?' and `*').

       -newer file    Tests true if the current file has been modified more recently than the argument file.

       -ok command    Executes specified command on standard output, then standard input is read and command executed only upon response y.

       -perm onum     Tests true if file has specified octal number.  For further information, see If onum is prefixed by a minus sign, more  flag
		      bits (017777) become significant and the flags are compared: (flags&onum)==onum.	For further information, see

       -print	      Prints current pathname.

       -size n	      Tests true if the file is n blocks long (512 bytes per block).

       -type c	      Tests  true  if  file is c type ( c = b, block special file: c, character special file: d, directory: f, plain file: l, sym-
		      bolic link: p, type port: s, type socket).

       -user uname    Tests true if file owner is login name or numeric user ID.

       The primaries may be combined using the following operators (in order of decreasing precedence):

       1)  A parenthesized group of primaries and operators (parentheses are special to the Shell and must be escaped).

       2)  The negation of a primary (`!' is the unary not operator).

       3)  Concatenation of primaries (the and operation is implied by the juxtaposition of two primaries).

       4)  Alternation of primaries (`-o' is the or operator).

       To remove all files named `a.out' or `*.o' that have not been accessed for a week:
       find / ( -name a.out -o -name '*.o' ) 
       -atime +7 -exec rm {} ;

       To find all files on the root file system type:
       find / -mount -print

       To write all the files on the root file system to tape:
       find / -mount -print -cpio /dev/rmt?h
       cpio -iBvt < /dev/rmt?h

       To find all the mount points on the root file system type:
       find / ! -mount -print

See Also
       cpio(1), sh(1), test(1), cpio(5), fs(5)


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