How do I pass a file to a bash script?

4 Answers

1. Pass the contents of the file on the command line, then use that in the script.
2. Pass the filename of the file on the command line, then read from the file in the script.
3. Pass the contents of the file on standard input, then read standard input in the script.

How do you use the zcat command?

For this purpose, you need the zcat command utility. Zcat is a command line utility for viewing the contents of a compressed file without literally uncompressing it. It expands a compressed file to standard output allowing you to have a look at its contents. In addition, zcat is identical to running gunzip -c command.

How do I pass a JSON variable in bash?

First, your name property is a string, so you need to add double quotes to it in your json. Second, using single quotes, bash won’t do variable expansion: it won’t replace $r_name with the variable content (see Expansion of variable inside single quotes in a command in bash shell script for more information).

What is the command used to view the content of a compressed file?

If you need to check the contents of a compressed text file on Linux, you don’t have to uncompress it first. Instead, you can use a zcat or bzcat command to extract and display file contents while leaving the file intact. The “cat” in each command name tells you that the command’s purpose is to display content.

Can we pass variable in JSON file?

E.g. { “person1”: { “password”: “abc”, “username”: “Alice”, “welcome”: “Hello Alice!” }, “person2”: { “password”: “123”, “username”: “Bob”, “welcome”: “Hello Bob!” } } Other than fields you can also declare variables using local , e.g.

How to use the zcat command in a Linux environment?

It is a very simple and common way to use the zcat command in a Linux environment. It will print the compress file content which is provided to the zcat command. Explanation: We are creating a few sample files in the data directory. As per screenshot 1 (a), we have created the data.txt file and compress it with the help of gzip.

How do I force zcat to open a file?

Zcat Command: Force File View In the zcat command, we are having the functionality to display the file content whether the file is compressed or not. To print the file contented forcefully, we need to use the “-f” option with the zcat command.

Is it possible to run gunzip –c command with zcat?

A few more updates, the zcat is compatible to run the gunzip –c command. The zcat command is majorly working with two components i.e. option and the compressed file name.

How to compress files without uncompressing in Linux zcat?

In Linux Zcat, Linux ecosystem, we are able to compress the files with the help of gzip or gunzip. But when we need to check the compress file content without uncompressing the compressed files then we are using the zcat command. Note: The zcat utility is only working with the gzip or gunzip compress files.