"Linux" CP command

Use

CP can also create shortcuts in addition to the copy function

Full Name

CP is all called copy

Parameters

-A: equivalent to specifying parameters at the same time PDR

-D: If the file is a link file's property (link files), the linked file property is copied instead of the file itself

-F: Mandatory meaning (Force), if the target file already exists and cannot be opened, then try again after removing

-I: If the target file exists, the action will be asked before overwriting

-L: Link to a hard link instead of copying the file itself

-P: Copied along with the default properties of the archive, not using default properties

-R: Recursive continuous Replication for directory replication behavior

-S: Copy as a symbolic link file, which is a shortcut

-U: Update if destination is older than source

Case

Example one: Copy the. BASHRC from the home directory to/TMP under root, and modify the name to BASHRC, and use the I parameter

[email protected] ~]# CP. BASHRC/TMP/BASHRC Copy the. BASHRC from the home directory to/TMP, and modify the name to BASHRC

[email protected] ~]# cp-i. BASHRC/TMP/BASHRC
CP: Do you want to overwrite "/TMP/BASHRC"? y N is not covered, Y is overlay

Example two: Transform the directory to/TMP and copy the/etc/host.conf file to the directory

Before copying:

[email protected] tmp]# ls-l/var/log/btmp View file properties
-RW-------. 1 root utmp 768 August 6 21:52/var/log/btmp

Copy:

[email protected] tmp]# cp/var/log/btmp. Copy file btmp to current directory

After copying:

[email protected] tmp]# ls-l btmp View the copied file properties
-RW-------. 1 root root 768 August 7 22:21 btmp

We can see from the Green Mark section that the obvious change

To add a parameter copy:

[email protected] tmp]# cp-a/var/log/btmp.
CP: Do you want to overwrite "./btmp"? Y

[email protected] tmp]# ls-l btmp
-RW-------. 1 root utmp 768 August 6 21:52 btmp

Example three: Copy all the contents of the/etc/directory to/tmp

[email protected] tmp]# cp/etc/tmp
CP: Skip Directory "/etc"

In this case, you need to add the parameter R to replicate

[email protected] tmp]# cp-r/etc/tmp can also use a parameter (cp-a/etc/tmp )

Example four: Creating a Connection file (shortcut)

[email protected] tmp]# cp-s BASHRC Bashrc_link
[Email protected] tmp]# ls-l bashrc*
-rw-r--r--. 1 root root 176 August 7 22:08 BASHRC
lrwxrwxrwx. 1 root root 6 August 7 22:39 bashrc_link–> BASHRC bashrc_link as Shortcut

Example five: If ~/.BASHRC is newer than TMP/BARSHRC, copy it.

[email protected] tmp]# cp-u ~/.BASHRC /TMP/BASHRC

Example SIX: see the D parameter action by copying a shortcut

[email protected] tmp]# CP bashrc_link bashrc_link1 generic copy, without parameter d, the source file is copied
[email protected] tmp]# cp-d Bashrc_link bashrc_link2 copied the shortcut
[email protected] tmp]# ls-l bashrc*
-rw-r--r--. 1 root root 176 August 7 22:08 BASHRC
lrwxrwxrwx. 1 root root 6 August 7 22:39 bashrc_link-BASHRC
-rw-r--r--. 1 root root 176 August 7 22:47 Bashrc_link1
lrwxrwxrwx. 1 root root 6 August 7 22:47 bashrc_link2-BASHRC

Example seven: Multiple data files are copied to the same directory

For example, there is a file 1.txt,2.txt,3.txt under directory TMP (3 files are empty pieces)

[email protected] tmp]# cp/tmp/1.txt/tmp/2.txt/tmp/3.txt/usr/local/sbin/
[Email protected] tmp]# cd/usr/local/sbin/
[email protected] sbin]# LL
Total dosage

-rw-r--r--. 1 root root 0 August 7 22:53 1.txt
-rw-r--r--. 1 root root 0 August 7 22:53 2.txt
-rw-r--r--. 1 root root 0 August 7 22:53 3.txt

We can see that the files have been successfully copied

"Linux" CP command