How to output the first line from every file in Linux?

@gaston 

To output the first line from every file in Linux, you can use the head command in combination with a file globbing pattern. Here's the command:

1

head -n 1 *

Explanation:

• head is a command used to print the first lines of a file.
• The option -n 1 specifies that we only want the first line.
• The asterisk * is a file globbing pattern that matches all files in the current directory.

When you run this command, it will display the first line of every file in the current directory.

@gaston 

Alternatively, you can use a combination of the find command and head command to achieve the same result:

find . -type f -exec head -n 1 {} ;

Explanation:

• The find command is used to search for files in a directory hierarchy.
• The . specifies the current directory as the starting point for the search.
• -type f specifies that we are only interested in regular files.
• -exec allows us to execute a command on each file found by find.
• head -n 1 {} is the command executed on each file. It prints the first line of the file.
• ; signifies the end of the -exec option.

This command will find all files in the current directory and print the first line of each file.