Linux simple Command

Command	Usage
Alias	To create the shortcut for the Command To go the path /root/user/test   Linux command is  cd  /root/user/test  . alias   alias_name  = ’ cd /root/user/test’ We can use alias_name  as command to go mentioned path
bc	To Perform the simple mathematical operation in terminal itself
bzip2	Compress the files . Bzip2  -c -9  old_file_name.mp3> new_file_name.bz.2. -c—standard output. -9 for best compression result
Cat	used for the create , view , concatenate the file Cat > testFile.txt – To create the new file. Cat testFile.txt   - To view the testFile.txt. Cat >>testFile.txt to append data in testFile1.txt file Cat testFile.txt testFile2.txt >output.txt
Chmod	To change  the file rights Chmod     user group other;                 0             none                1             execute only                2             write only                3             write and execute                4             read only                5             read and execute                6             read and write                7             set all permissions chmod  700—all rights for user . none of rights for group and others. Chmod  600 – only read and write for user  rest of no rights. 6=read+write =4+2=6;
Copy	Cp  file1.txt  file 2.txt – To copy the content file1 to file2 Cp –r  folder1  folder2   used to copy folder and subfolder scp- copy in remote system
Crontab	command used to add jobs in cron.jobs calls itself chrontab –e * * * * *  jobname; 1st * -- minute 2nd * – hour 3rd  *– day 4th * -  month 5th *-  weak
Grep	to search the word in file. grep  ‘searchword’filename; It will show the searched word in terminal. grep ‘searchword’filename>newFile.txt It will create a new file contains the searched word
Halt	shutdown the system
head	To view the content of file. Head  filename ---- show the first 10 lines Head -45 filename --show the first 45 lines Head -5 filename>test.txt   -First 5 lines of filename will copied to test.txt file.
Paste	Paste the content Paste file1.txt file2.txt  -- to paste the file1.txt content to file2.txt
Pwd	Path of current working directory.
link	This command is used to link the file. We cannot link already present file. Link test1.txt test2.txt . If we change the test1.txt  it will reflect  in  test2.txt file also.
tail	Like head command. To view the content of file. tail filename ---- show the last 10 lines tail -45 filename --show the last 45 lines tail -5 filename>test.txt   -First 5 lines of filename will copy to test.txt file.
man	It is used to know about command Man cp—To know about the copy command
ls	List out the list of files

VI Editor commands

http://www.cs.rit.edu/~cslab/vi.html

Mount Windows shared folder in Linux machine at LAN connection
This for Temporary mount
Step 1: Create the folder  at Linux machine .
Step 2: Share your windows folder in Network
Step 2: Execute following command
mount -t cifs //windows IP/windows sharefolder name -o
windowsUsername=<USERNAME>,password=<PASSWORD> Linux folder created path


mount -t cifs //192.168.2.196/MyFile -o username=admin,password=123 /root/Desktop/MyFile

For Permanent Mount:

By using vi editor open the fstab under etc.

vi /etc/fstab 

And add the following code 

//windows IP/windowsSharefolderName  LinuxFolderCreatedPathFile FilesystemName  permission windowsUsername=<USERNAME> ,password=<PASSWORD>

 //192.168.2.196/MyFile   /root/Desktop/MyFile cifs  rw  username=admin,password=123

online Linux command practice

http://bellard.org/jslinux/