Basics Unix command helpful in hadoop

Following are the some basic commands which will help you in Hadoop :

Command	Usage	Description
su	This is called as switch user .Syntax : su username Example : su auhadoop	This will help you to change user or switch user
pwd	This is called as present working directory .Syntax : pwd Example : pwd	This will help you to identify your present working directory
ls	This is called as List . Syntax : ls /directory_path Example : ls /user/ or ls /	List the directories or files present in mentioned directory
cd	This is called as change directory .Syntax : cd / or cd /Path Example : cd / or cd /user	This will change directory which ever path you mention after cd
mkdir	This is called as make directory .Syntax : mkdir /directory_name Example : mkdir /Input	This will create a new directory
touch	This is called as touch .Syntax : touch /directory_name/file_name Example :touch /user/file1.txt	This will create a new file
rmdir	This is called as remove directory .Syntax : rmdir /directory_name Example : rmdir /Input	This will remove directory
rm	This is called as remove .Syntax : rm /directory_name/file_name Example : rmdir /Input/inputfile.txt	This will remove file
chmod	This is called as change mode .Syntax : chmod 777 /directory_name or file_name Example : chmod 777 /input.txt	This will used to provide read , write and execute permission to directory or file .
cat	This is called as cat.Syntax : cat /File_name Example :cd /input.txt	This will show the content of the file . Note : This is only used with files .
mv	This is called as move.Syntax : move /Sourcefolder/file_name /Targetfolder Example :mv /user/file1.txt /test/	This will move file from one directory to another directory / This will also be used to rename the file Syntax : move Currentfilename newfilename Example : mv fileold.txt filenew.txt
cp	This is called as copy.Syntax : copy filepath /destination_directory_path Example :cp /input.txt /test/	This will copy file to new location

     

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