COMPRESSING FILES IN LINUX

 Files can be compressed in Linux using the "tar" command. The tar command stands for tape archive, and is used to create archives and extract files from archives. The tar command is one of the most important commands in Linux that provides compressing files into archives. 


Syntax:


Options:
1. -c: Creates Archive
2. -x: Extracts the archive
3. -f: Creates Archive with given Filename
4. -t: Displays or Lists the content contained by the archived file
5. -u: Archives and adds to an existing Archive file
6. -v: Displays Verbose Information
7. -A: Concatenates the archived files
8. -z: Zips files and tells tar command to create tar file using gzip
9. -W: Filter an archive file
10. -r: Update of Add file or directory to an already existing .tar file

What is an Archive File?
An Archive file is a file that is composed of one or more files along with metadata. Archive files are used to collect multiple data files together into a single file for easier portability and storage, or simply to compress files to use less storage space.

Examples:
1. Creating an uncompressed tar Archive using option -cvf : This command creates a tar file called file.tar which is the Archive of all .c files in the current directory.

Output:


2. Extracting files from Archive using option -xvf : This command extracts files from Archives.

Output:


3. gzip compression on the tar Archive, using option -z : This command creates a tar file called file.tar.gz which is the Archive of .c files.


4. Extracting a gzip tar Archive *.tar.gz using option -xvzf : This command extracts files from tar archived file.tar.gz files.


5. Creating compressed tar archive file in Linux using option -j : This command compresses and creates archive file less than the size of the gzip. Both compress and decompress takes more time then gzip.

Output:


6. Untar multiple .tar, .tar.gz, .tar.tbz file in Linux : This command will extract or untar multiple files from the tar, tar.gz and tar.bz2 archive file. For example the above command will extract %u201CfileA%u201D %u201CfileB%u201D from the archive files.


7. Check size of existing tar, tar.gz, tar.tbz file in Linux : This command will display the size of archive file in Kilobytes(KB).


8. Viewing the Archive using option -tvf

Output:

Comments

Post a Comment

Popular posts from this blog

OOP Assignment 3 helping materials

 Following is the code that will help you in the assignment for the addition of the arrays using operator overloading and returning an object. #include<iostream> using namespace std; int num; struct add {     int ar[20]; }; add operator+(add &a1,add &a2) {     add a3;     for(int i=0;i<num;i++)         a3.ar[i]=a2.ar[i]+a1.ar[i];     return a3; } int main() {     add a1,a2,a3;     cout<<"How many elements to be stored (max 20) : ";     cin>>num;     cout<<"Enter elements of array a1 : ";     for(int i=0;i<num;i++)         cin>>a1.ar[i];     cout<<"Enter elements of array a2 : ";     for(int i=0;i<num;i++)         cin>>a2.ar[i];     a3=a1+a2;     cout<<"Addition of two arrays : ";     for(int i=0;i<num;i++)   ...
Read more

Square root Algorithm in C++

 Here is the way you can find the square root of any number by writing your own code in c++.  #include<iostream> using namespace std; double sqrt(double num){ double stop_condition = 0.00000001; double guess = num/2; while((guess-num/guess) > stop_condition){ guess = (guess+num/2)/2; } return guess; } int main(){ double num = 4; cout<<"The result is: "<<sqrt(num)<<endl; return 0; }
Read more

OOP lab 7 task solution

  #include <iostream> using namespace std ; class position { public: int x ; int y ; position (){ x = 0 ; y = 0 ; } position operator + ( position & p_any ){ position p1 ; p1 . x = this -> x + p_any . x ; p1 . y = this -> y + p_any . y ; return p1 ; } }; int main (){ position p1 ; cout<< "Enter the intial values of x and y cordinates: " ; cin>> p1 . x >> p1 . y ; position p2 ; cout<< "Enter the new values for x and y to be shifted: " ; cin>> p2 . x >> p2 . y ; position p3 ; p3 = p1 + p2 ; cout<< "The initial values were: " << p1 . x << " " << p1 . y <<endl; cout<< "The new values are: " << p3 . x << " " << p3 . y <<endl; } // from now onward this is the second task #in...
Read more