Unix file input redirection

I am trying to write a script that can add additional entries and then sort it alphabetical by last name and resave it to the original file. I am using C shell to script.

This is the section of my script that I wish to Is there any way to do this? Input Redirection. Hi everybody, first of all i am a new member in UNIX. I am impressed with the amount of information a person can ever have in this forum, it is really great having something similiar; anyways let me tell you about the problem I am having, hope you will answer me Changing stdin from file redirection to console input.

Hi I am doing file redirection at console for use by my binary. So essentially I want to redirect stdin back to console. But I cant figure out how to do it. RedHat Commands. OpenSolaris Commands. Linux Commands. SunOS Commands. FreeBSD Commands. Full Man Repository. Advanced Search. For example, if you never care about viewing the standard output, only the standard error channel, you can do the following:.

In this case, successful command output will be discarded. One final miscellaneous item is the technique of combining the two output streams into a single file. Discard the output: Sometimes you will need to execute a command, but you don't want the output displayed to the screen. Here command is the name of the command you want to execute. Redirection Summary: Redirection Operator.

Resulting Operation. Social Profiles. Like us on Facebook. Follow unixmantra. Search This Blog. Training Privacy Policy Powered by Blogger. Descriptor Points to -. Standard Input Generally Keyboard. You will see your input will be reprinted. If you use only a single angular bracket all the content of the file will be lost. Skip to content. Change Language. Related Articles. Table of Contents. Improve Article. Save Article. Note : Use the correct file name while redirecting command output to a file.

If there is an existing file with the same name, the redirected command will delete the contents of that file and then it may be overwritten. The cat command reads the file music.

If the sound configurations in your PC are correct, this command will play the file music. You can type the contents of the email using the standard device keyboard. But if you want to attach a File to email you can use the input re-direction operator in the following format. The above examples were simple. Regular file, Directories, and even Devices are files.