Linux command finishing-basic operations

Linux has been used for some time, to tidy up the common Linux commands


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Linux command finishing-basic operations
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1.ls Directory Enumeration (dir)
Generally we write this:

Linux Code

1. Ls

Enumerating all the files in the current directory, if there are many files, it is very complicated. We can add keywords, for example we want to see all the files that contain XML.

Linux Code

1. LS *xml*

If this time, we want to see the owner information of these files can be written like this:

Linux Code

1. Ls-la

2.cd Directory Switching
As with other directory switching commands, there is no difference.

Linux Code

1. CD A

Switch to the A directory.

3.chown Change the owner of a file (folder)
Above through LS we see a bunch of files, there may be files we can not operate, this time requires the root account to execute the chown command to change the file belongs to, you can write:

Linux Code

1. Chown Boss.boss *

This operation is to give all the files in the current directory to the boss user and the boss Group user all rights. So the files (folders) under the Sub-folder need to be modified how to do it? Perform

Linux Code

1. Chown-r Boss.boss *

4.mkdir Creating a directory
This command is simple enough to perform

Linux Code

1. mkdir x

We have built an X directory under the current directory.

5.cat File View
We can view the contents of the file via the cat command and execute

Linux Code

1. Cat A.xml

We can view the contents of this file, of course, in textual form.

6.tail File View (can track files)
If this command does not add parameters, and Cat no difference, the final thing is that he can track the contents of the file, we often use it to monitor the log, such as

Linux Code

1. Tail-f Javaeye.log

When the Javaeye.log file grows, we can capture this change in the console, and if the log file changes quickly it looks like a scene in The matrix (black-green, no-stop brush!). ）。

7.tar File Compression
Compression decompression, which is the basic operation of the deployment effort.

Linux Code

1. TAR-ZVCF java.tar.gz Java

All files containing subfolders under the Java directory are compressed into java.tar.gz files.
In turn, the unzip execution

Linux Code

1. TAR-XZVF java.tar.gz

8.rm Delete
Tossing so much, generating a heap of junk files. Clean up quickly, hehe!

Linux Code

1. RM *

Oh, my God! It's horrible! Fortunately did not carry out!!! Brothers, remember that you must not use this command when you execute the DELETE command!!! If you are a super administrator, it will be possible to delete all the files, the system will be paralyzed in the moment of reboot!!! It's a good idea to specify a filename or path name to avoid all deletions, which is suicide! Oops, the directory can not be deleted, there are sub-files can not be deleted what to do?

Linux Code

1. Rm-r XML

This allows you to completely delete the XML directory.

9.su Super User command
Just doing chown, we need to switch to the superuser, the root user, what to do? Perform

Linux Code

1. Su

Follow the prompts to enter the root user password and easily switch to Superuser. This account is not recommended for non-essential situations!

10.vim (vi) text editing
This is a bit more complicated, so let's just say that simple operations can meet our needs. Writing a file is nothing more than writing something in. VI, VIM use up, feel or vim comfortable a bit. Edit a file,

Linux Code

1. Vim A.txt

Now that the file is open, but you cannot edit it, type i. Tip Insert, insert State, we can insert text. Finished,Ctrl + C end the input status, type : w, Save does not exit, type : Wq, save exit. What if you don't save a forced exit? Type : q!. Of course, if you just come up and look at the content to exit directly, then type : Q . If you want to find a keyword in the file, you can type/ x. / means search, andx is the keyword.

11.cp File Copy
This command is an abbreviation for the copy Word, such as we want to do a file/directory backup, you can use this command:

Linux Code

1. CP A.txt A.txt.bak

In this way, the backup file A.txt.bakis obtained from the a.txt file.
If you want to copy a directory, you need to use the parameter- R:

Linux Code

1. Cp-r a B

This allows you to copy the A directory into the B directory.

12.mv File Clipping
This command is an abbreviation for the move word that can be used to cut/rename files and directories.
This command was originally intended to cut the operation, but from its point of view, it is suitable for the name of the duplicate!

Linux Code

1. MV A C

A is a file, it can be a directory, the above operation, a file/directory becomes a c file/directory!


13.mount Device Mount

Linux Code

1. Mkdir/media/cdrom
2. Mount-t Iso9660/dev/cdrom/media/cdrom

-T iso9660 Optional

14.umount Device Uninstall

Linux Code

1. Umount/media/cdrom

15.env Environment Variables

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Linuxjava_hometimezonedns A, java_home have days did not match the Linux environment, incredibly already began unfamiliar. Vim ~/.profile Configuring the JAVA environment, configuring time zones wrote #Java环境export Java_home=/usr/bin/javaexport classpath=.: $JAVA _home/lib/dt.jar: $JAVA _ Home/lib/tools.jar export path=.: $JAVA _home: $PATH then load the file:. ~/.profile Second, TimeZone or modify ~/.profile file Vim ~/.profi ...

• 2014-11-14 15:23
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• 2014-11-14 14:28
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[Top] Conquer Mongodb master-slave Replication & cluster replication Blog Category:

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Mongodbmaster slavereplicate setprimarysecondary Lianpo old, passable rice? and then! MongoDB research is always intermittent, need to continue to operate, to accumulate, for future work to provide reference. The end of the year, the use of the thing to do a convergence. Clean up the stuff that was written at the beginning of the year.   Today try a copy of the cluster Replicateset mode, do a small summary, follow-up in this post is constantly filled. Cluster configuration RELATED Links: Conquer MongoDB Installation and system service configuration Conquer MongoDB Master-slave Replication & cluster replication Basic operations RELATED links: Common commands for conquering MongoDB, basic data types The modifier of the conquest of MongoDB Conquer Mongodb modifier Enhanced ...

• 2013-11-14 15:44
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Top GPG operation--Signature verification Blog Category:

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GPGPGP recently reviewed the previous contact but did not understand the technical problems, and gradually restore the blog high-yielding habits ~ Problem Description: You may have encountered the software during the download process due to the network caused by the download of software volume and actual software volume does not match. The most common approach is to attach a summary file to the download file. This approach is more common and easier to implement. However, there is still a problem: if I tampered with the site, changed the contents of the file, and made a summary of the file, replaced the original summary file. The user's downloaded file loses the meaning of the digest verification. How can we avoid this problem? Solution: The software provider signs the file, and the software user verifies the file. Signature/Verification is a common method for authenticating the validity of network data transmission, which belongs to the field of asymmetric encryption algorithm. Use the private key to sign the data, use the public key to ...

• 2013-05-30 10:15
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How do you make yourself strong in linuxjoin work? Learn from the people around you! Colleagues to help Linux the next two files in the same part of the filter, the data file is very large, how to operate.   Finally found the cattle, I just stopped stealing the teacher's apprentice. RELATED links: Linux command finishing-basic Operations Linux command collation-user management one or one-like association for example there are two files: wrote $ cat 1a 100b 200c 300d $ cat 2c 2012-03-01d 2012-0 5-01A 2012-01-01 I want two files that match each other, that is, part A, C, and D. Wrote $ Join 1 2c 2012-03-01d 500 2012-05-01 ...

• 2013-05-23 14:58
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• 2013-04-16 13:00
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Top GITLAB Installation Issues Blog Category:

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• 2013-03-21 11:35
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[Top] The CRUD to conquer Mongodb Blog Category:

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• 2013-01-15 16:41
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Top Enforce case sensitivity when MySQL queries Blog Category:

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• 2012-09-20 09:40
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Linux command finishing-basic operations