How to create file in linux
Last Updated on Friday, 01 April 2011 18:19
Question:
What is the best way to create a file in Linux. The file should be empty and it should be regular text file. I tried "create file" command but it did not work !
Answer:
The general way to create file is to use touch command. To create a file called create-file using touch command we can do:
$ touch create-file
This file will be empty and its name will be create-file . However, this is not the only way how you can create a file in Linux . Here are some other ways on how to create a file in linux: Create file using echo command:
$ echo "" > create-file
Create file using redirection:
$ > create-file
Create file by copying /dev/null:
$ cp /dev/null create-file
If you wish to create a file with certain content you can use echo command.
$ echo my new created file > create-file
This will create a file called create-file with a "my new created file" content. Other way how to create a file in Linux with some content in it is to use vi editor ( or any other text editor will do ):
$ vi create-file
This will create a file when you save from within vim editor. You can also create some dummy file with a certain data size. For example the command below will create a file with size 200 MB in size:
dd if=/dev/zero of=create-file bs=1M count=200
In Linux there is also way to create a file with a huge size and taking no space. Let's create a file with size of 2TB:
$ df -h . Filesystem Size Used Avail Use% Mounted on /dev/sda1 72G 20G 51G 29% / $ dd bs=1 seek=2TB if=/dev/null of=create-file 0+0 records in 0+0 records out 0 bytes (0 B) copied, 2.0464e-05 s, 0.0 kB/s $ ls -lh create-file -rw-rw-r--. 1 lilo lilo 1.9T Mar 17 16:20 create-file $ df -h . Filesystem Size Used Avail Use% Mounted on /dev/sda1 72G 20G 51G 29% /
Hope this helps..  
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