Java programmers must learn to develop the linux command summary

Find Files

• find / -name filename.txt filename.txt find files in the / directory by name.

• find. -name "* .xml" recursively find all the xml file

• . Find -name "*" | xargs grep "hello" xml file recursive search of all files contained in the content of hello world

• grep -H 'spring' * .xml find so some xml file that contains the spring

• find ./ -size 0 | xargs rm -f & delete files with zero size files

• ls -l | grep '.jar' to find all the current jar file directory

• grep 'test' d * to show all files beginning with d rows included in the test.

• grep 'test' aa bb cc matching test in the display line aa, bb, cc file.

• grep '[az] {5}' aa show all rows each string comprising at least 5 contiguous string of lower case characters.

Check if a program running

• ps -ef | grep tomcat tomcat view of all relevant processes

• ps -ef | grep --color java highlighted keywords to query (see all start the service)

Terminate the process

• kill -9 19979 terminate the thread number of process-bit 19979

View files, containing hidden files

• -to ls

The current working directory

• pwd

Copy files

• cp source dest Copy files

• cp -r sourceFolder targetFolder recursively copy the entire folder

• scp fileName root @ ip: / addr Remote Copy

Create a directory

• mkdir newfolder

Remove directory

• delete empty directories rmdir deleteEmptyFolder

• rm -rf deleteFile recursive directory delete all content

Moving Files

• mv /temp/movefile /targetFolder

Rename

• mv oldNameFile newNameFile

  Switch User

• su -username

Modify file permissions

• Permissions chmod 777 file.java file.java of -rwxrwxrwx, r for read, w for write, x for executable

Compressed file

• takes -czf test.tar.gz / test1 / test2

Lists the compressed files list

• tar -tzf test.tar.gz

unzip files

• takes -xvzf test.tar.gz

10 lines before viewing files

• head -n 10 example.txt

After a review of files row 10

• tail -n 10 example.txt

View Log Last Updated

• tail -f exmaple.log This command will automatically display the new content, the screen only displays 10 lines of content (can be set).

Execute commands using a super administrator

• sudo rm a.txt as administrator to delete files

View port occupancy

• netstat -tln | grep 8080 view usage port 8080

View port belongs to which process

• lsof -i :8080

View the process

• ps aux | grep java view java process

• ps aux view all processes

List directory in a tree format

• tree a

• PS: Mac using the tree under the command

document dowload

• wget http://file.tgz

  PS: Mac install wget command under

• curl http://file.tgz

Network Detection

• ping www.just-ping.com

Remote Login

• ssh userName@ip

Print information

• echo $ JAVA_HOME print the value of java home environment variable

Java common commands

• java

• javac

• Jvp

• jps

• jstat

• jmap

• jstack

Other commands

• svn

• git

• maven

Annex: extracting archive command Details

1. Compression

1. tar -cvf jpg.tar * .jpg // directory to package all jpg files into tar.jpg

2. After the tar -czf jpg.tar.gz * .jpg // directory to package all jpg files into jpg.tar, and its use gzip compression to generate a gzip compressed package named jpg.tar.gz

3. After the tar -cjf jpg.tar.bz2 * .jpg // directory to package all jpg files into jpg.tar, and it is compressed with bzip2, to generate a bzip2 compressed package named jpg.tar.bz2

4. After the tar -cZf jpg.tar.Z * .jpg // directory to package all jpg files into jpg.tar, and its use compress compression, produces a umcompress compressed package named jpg.tar.Z

5. rar a jpg.rar * .jpg // rar compressed format, you need to download rar for linux

6. zip jpg.zip * .jpg // compressed zip format, you need to download the zip for linux

2. Extract

1. tar -xvf file.tar // extract the tar package

2. tar -xzvf file.tar.gz // 解压 tar.gz

3. tar -xjvf file.tar.bz2 // 解压 tar.bz2

4. tar -xZvf file.tar.Z // unpack tar.Z

5. unrar e file.rar // Kai压 rar

6. unzip file.zip // extract the zip