Linux first week study notes (18)

Linux first week study notes (+)

2.11.CP Command

CP ( Copy shorthand) Command: used to copy one or more source files or directories to a specified destination file or directory.

Cp–r : Copy Directory

- I. : Security Options

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CP command: Copy /etc/passwd/ files to /tmp/ directory from the name of the 01.txt

[Email protected] ~]# Cp/etc/passwd/tmp/01.txt

[Email protected] ~]# ls/tmp

01.txt

Daizhihong

Daizhihong1

Ks-script-9pf2we

Ls1

Systemd-private-17411cf38aa84739852c7f37c5bb6b71-chronyd.service-qj4br8

Systemd-private-17411cf38aa84739852c7f37c5bb6b71-vgauthd.service-lrctds

Systemd-private-17411cf38aa84739852c7f37c5bb6b71-vmtoolsd.service-tptave

Systemd-private-600bc20c894f45978b1376aee644f335-chronyd.service-9iyyvb

Systemd-private-600bc20c894f45978b1376aee644f335-vgauthd.service-vbgivb

Systemd-private-600bc20c894f45978b1376aee644f335-vmtoolsd.service-mlvpl3

Yum.log

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Cp-r Copy directory: Create a new directory /tmp/daizhihong3/ , and then put /tmp/daizhihong/ directory Copy to /tmp/daizhihong3/ in Directory

[Email protected] ~]# mkdir-pv/tmp/daizhihong3/

mkdir: The directory has been created "/tmp/daizhihong3/"

[Email protected] ~]# cp-r/tmp/daizhihong//tmp/daizhihong3/

[Email protected] ~]# tree/tmp/daizhihong3/

/tmp/daizhihong3/

└── Daizhihong

└── 11.txt

1 directory, 1 file

Note: Sometimes the copy source is added in the copy directory. / "and the target is not added." / ", in Linux When you copy a directory in the system, you need to bring "/" the.

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!$ : Represents the last parameter that executes the previous command

[Email protected] ~]# tree/tmp/daizhihong3/

/tmp/daizhihong3/

└── Daizhihong

└── 11.txt

1 directory, 1 file

[email protected] ~]# tree!$ (Executive Tree the last parameter of the previous line of the command)

tree/tmp/daizhihong3/

/tmp/daizhihong3/

└── Daizhihong

└── 11.txt

1 directory, 1 file

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" - I. "parameter: Before we use which when you query the absolute path of a command, a " - I. "parameter, the meaning of this parameter is a security parameter, ask whether the execution is because the added" - I. "The Parameters

[email protected] ~]# which CP

Alias cp=' Cp-i '

/usr/bin/cp

[Email protected] ~]#

[email protected] ~]# which RM

Alias rm=' Rm-i '

/usr/bin/rm

[Email protected] ~]# cp/tmp/daizhihong/11.txt/tmp/daizhihong1/

CP : whether to overwrite "/tmp/daizhihong1/11.txt" ? n( the "-I " parameter will prompt if it needs to be overwritten or if it needs to be deleted when the RM command is executed, so "-i" is a security parameter)

When typing a command, do not ask for the command format as follows:

[[Email protected]~]#/usr/bin/cp/tmp/daizhihong/11.txt/tmp/daizhihong1/

[Email protected] ~]#

Absolute path command format execution will not prompt for an inquiry

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The following experiment shows that when the target directory is already present, the source directory is placed directly into the target directory, and if the target directory does not exist it will copy the source directory and change the name.

[Email protected] ~]# Tree/tmp/daizhihong

/tmp/daizhihong

└── 11.txt

0 directories, 1 file

[Email protected] ~]# tree/tmp/daizhihong1

/tmp/daizhihong1

└── on

└── 11.txt

1 directory, 1 file

[Email protected] ~]# cp-r/tmp/daizhihong//tmp/daizhihong1/

[Email protected] ~]# ls/tmp/daizhihong1/

Daizhihong

[Email protected] ~]# tree/tmp/daizhihong1

/tmp/daizhihong1

├── on

│ └── 11.txt

└── Daizhihong (the source directory is placed directly in the target directory when the target directory already exists )

└── 11.txt

2 directories, 2 files

[Email protected] ~]#

Linux first week study notes (18)