Discrepancy in the size of compressed file
I was trying to compress a folder into .tar format.
The folder size is around 76 MB.
Suppose I want to compress the folder myfolder to my-compressed-folder (in tar format)
I tried 2 approaches:
1) In the terminal, I executed:
tar -cjvf my-compressed-folder myfolder
The size of .tar by this method is 23 MB
2) On using the in-built Compress after right clicking on myfolder & choosing the .tar.xz, the size of .tar is around 17 MB.
I have 2 doubts:
1) How is there so much size difference in the 2 compressed files in same (.tar) format?
2) Is there any Linux command by which I can create compressed .tar files with the compression ratio same as the in-built Compress feature of Ubuntu?
My system details are as follows:
Ubuntu Desktop
Version 18.04.4 LTS (64-bit)
1 ответ
От man tar :
-j, --bzip2 Фильтруйте архив через bzip2 (1). -J, --xz Фильтруйте архив через xz (1).
Итак, ваша команда tar -cjvf my -ressed-folder myfolder создала сжатый bzip2 архив, а не сжатый xz.
Для сравнения яблок с яблоками с tar.xz файл, который вы создали из файлового менеджера, вы должны использовать tar -cJvf my -ressed-folder myfolder .