find

Example;

display top directory name list that update date is between "2018-04-07 00:00:00" and "2018-04-12 00:00:00"

find . -maxdepth 1 -type d -newermt "2018-04-07 00:00:00" -and ! -newermt "2018-04-12 00:00:00" -ls -t

sendfile

$ cat /proc/version

Linux version 2.6.32-696.13.2.el6.x86_64 ([email protected]) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC) ) #1 SMP Thu Oct 5 21:22:16 UTC 2017

$ sendfile --help
$ man sendfile

relation word:
file descriptor

tar

Linux version 2.6.32-642.3.1.el6.centos.plus.x86_64 ([email protected]) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-16) (GCC) ) #1 SMP Tue Jul 12 18:28:07 UTC 2016

$ tar --help
$ man tar

Example;

Compress large file

• first

  $ cd 'dir where there is file you want to compress'
  

• Compress specific file

  $ tar cvzf xxxxx.sql.tar.gz xxxxxx.sql
  

• extract compressed file

  $ tar zxvf xxxxx.sql.tar.gz
  

• options

-c, --create               create a new archive
-v, --verbose              verbosely list files processed
-f, --file=ARCHIVE         use archive file or device ARCHIVE
-z, --gzip, --gunzip, --ungzip   filter the archive through gzip