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How does Sudo read the password from stdin?
At first sudo will execute and reads the password from stdin. If it was OK with the password then it runs tee. sudo reads from stdin until it reaches a “n” character, so “mypasswordn” will be consumed by sudo. tee reads from stdin and it gets whatever left in it, “some textn”.
How to get sudo to accept password from standard input?
For sudo there is a -S option for accepting the password from standard input. Here is the man entry: -S The -S (stdin) option causes sudo to read the password from the standard input instead of the terminal device. This will allow you to run a command like:
How to write Sudo password to the pipe?
We should put “mypassword” + ” ” just before anything we want pass to tee. The curly braces groups command. We can look at {…} as one command. Whatever is in {…} writes to the pipe. echo ‘mypassword’ will write “mypassword ” to the pipe. This is read by sudo later.
Can You redirect stdout to a filename?
PS: About I/O redirection: Yes you are right, 1>filename is identical to >filename. They both redirect stdout to filename. Also 0
The -S switch makes sudo read the password from STDIN. This means you can do However, the suggestions by others that do not involve passing the password as part of a command such as checking if the user is root are probably much better ideas for security reasons
How do I get sudo to Read my Password?
-S The -S (stdin) option causes sudo to read the password from the standard input instead of the terminal device. The password must be followed by a newline character.
How to run Sudo script without root password?
You can set the s bit for your script so that it does not need sudo and runs as root (and you do not need to write your root password in the script): One option is to use the -A flag to sudo. This runs a program to ask for the password. Rather than ask, you could have a script that just spits out the password so the program can continue.
Can a stdin read from passwd.txt file?
But redirecting the stdin to read from the passwd.txt file should work. Shouldn’t it? Thanks for contributing an answer to Ask Ubuntu! Please be sure to answer the question.
Why is my Zsh showing weird character’?
However there is a weird question mark that is coming ever since I have changed ZSH-THEME to “agnoster”. Attaching the screenshot for the same. I thought powerline would help but that doesn’t seem to happen. Can can anyone help me with this? Installing a powerline patched font will solve this.
What kind of font do I use for Oh my Zsh?
Just select Use built-in Powerline glyphs and use Inconsolata for Powerline font. That’s it! On Mac – the previous answer in totally correct, just install and choose an appropriate font.