LS display unit when file size is displayed

When displaying file sizes in Linux, it is common practice to use "ls-l", which is the size of the file's byte size.
However, if the file is relatively large, the display is not particularly readable, this time, you can use "LS-LH", you can use a relatively close to the size of the file to display the size of the file, as follows:

[BILLING_DX@BMCS1 bin]$ ls-lh total
565M
-rwxr-xr-x 1 billing_dx billing 1.1M Mar 18:56 acctmgrservice-rw
-r--r--1 billing_dx Billing  364 Mar 18:59 acctmgrservice.conf
-rw-------1 billing_dx billing  11G Mar 13 1 8:37 core.22836
-rw-r--r--1 billing_dx billing  410 Mar 17:38 dll_info.conf
-rwxr-xr-x 1 billing_dx BILLIN G-   18:57 Go

When you use the "-H" parameter, the unit selected to display is "K", "M", or "G", depending on the size of the file. If you want to specify the units to display, you can use the "--block-size" argument as follows:

[BILLING_DX@BMCS1 bin]$ ls-l total 577724-rwxr-xr-x 1 billing_dx billing 1103862 Mar 18:56 r--1 billing_dx Billing 364 Mar 18:59 acctmgrservice.conf-rw-------1 billing_dx billing 10947788800 Mar 13 1          8:37 core.22836-rw-r--r--1 billing_dx billing 410 Mar 17:38 dll_info.conf-rwxr-xr-x 1 billing_dx Billing     18:57 go [billing_dx@bmcs1 bin]$ ls-l--block-size=k total 577724k-rwxr-xr-x 1 billing_dx Billing 1078K Mar 18:56 acctmgrservice-rw-r--r--1 billing_dx billing 1K Mar 18:59 acctmgrservice.conf-rw-------1
BILLING_DX Billing 10691200K 18:37 core.22836-rw-r--r--1 billing_dx billing 1K Mar 17:38 dll_info.conf -rwxr-xr-x 1 billing_dx billing 1K Mar 18:57 go [billing_dx@bmcs1 bin]$ ls-l--block-size=m Total 565m-rwxr-x R-x 1 billing_dx billing 2M Mar 18:56 acctmgrservice-rw-r--r--1 billing_dx billing 1M Mar 18:59 acctmgrser VICE.CONF-RW-------1 BILLING_DX Billing 10441M 18:37 core.22836-rw-r--r--1 billing_dx billing 1M Mar 17:38 dll_info.conf-rwxr-x R-x 1 billing_dx billing 1M Mar 18:57 go [billing_dx@bmcs1 bin]$ ls-l--block-size=g Total 1g-rwxr-xr-x 1 Billin G_DX billing 1G Mar 18:56 acctmgrservice-rw-r--r--1 billing_dx billing 1G Mar 18:59 ACCTMGRSERVICE.CONF-RW----- --1 billing_dx billing 11G 18:37 core.22836-rw-r--r--1 billing_dx billing 1G Mar 17:38 dll_info.conf-rwxr-x R-x 1 billing_dx billing 1G 18:57 Go

In contrast can be seen, using different units to display the time, the use of a method, so a 1k of things, using G for the unit display is, will display as "1G." Therefore, it is better to use "-H" to display, more in line with people's habits.
The following is a description of the LS display:

BILLING_DX@BMCS1 bin]$ man ls
ls (1)                            User Commands                           ls (1)


NAME
   ls-list Directory contents


Synopsis
   ls [OPTION] ... [FILE]


... DESCRIPTION
   List  information about the FILEs (the current  directory by default).  Sort entries Alphabetically if
   none Of-cftuvsux nor--sort.


   Mandatory arguments to long options are mandatory for short options too.


   -H,--human-readable
          with-l, print sizes in human readable format (e.g., 1K 234M 2G)-


   k like     --block-size= 1 k


   -l use     a long listing format


   --block-size=size use
          size-byte blocks.  The size format below size May is an  Integer optionally followed By one of the FOLLOWING:KB 1000, K 1024, MB
   1000*1000, M 1024*1024, and so in for G, T, P, E, Z, Y.

Extended reading:  http://hi.baidu.com/shiliangshuai/item/2310fac2ce7aa3bb0c0a7b3f