Questions tagged [stdin]

Question 1

In order to test extraction of large files by a batch job, I wanted to create several relatively small archives. As I was creating increasingly large archives, at some point they became partial of the ...

Question 2

Here is a silly example that effectively illustrates what I need: echo '"this text", " ", "is in speech marks"' | perl -lne 'print "$1" if /"(.*?)"/' ...

Question 3

This may seem like a question asked, but I have yet to find anything that works and I start suspecting it may be a bug in apt-get… So, I have a python installer wrapping around apt-get, whose relevant ...

Question 4

I'd like to use socat to redirect the STDIN/STDOUT of the process executing docker attach <container-id> to a listening TCP socket on my Linux system. root@eve-ng:/opt/unetlab# tty /dev/pts/2 ...

Question 5

I'm using GNU parallel like this (:::: is a form of --arg-file): parallel -0Xuj1 my-command -- :::: <(find … -print0) But it seems like the command's standard input is managed by GNU parallel, ...

Question 6

I'm having trouble finding a name for the - character in the context of a piped bash command. What is the - character called? Can I replace it with something more readable for a script? Example ...

Question 7

$ mkfifo mypipe $ echo "hello redirection" > mypipe $ cat < mypipe hello redirection I have problems when I try to do the above with python # pyecho.py with open("/dev/stdin"...

Question 8

I have large files which are generated on the fly to stdout, one every 24hours. I would like to archive these files progressively on tapes, ideally in a single archive which potentially spans multiple ...

Question 9

I have a script which asks users for input in the terminal, therefore in case the script is called with stdout redirected to a file, the user has no context on the prompt. So I would like to duplicate ...

Question 10

I seem to remember some command or envvar that tells you this. I'd like basically something that executed on terminal, for instance, give you echo $STDIN /dev/tty echo $STDOUT /dev/tty fdescribe 0 or ...

Question 11

stdin: Generally standard input, referred to as stdin, comes from the keyboard. When you type stuff, you're typing it on stdin (a standard input terminal). A standard input device, which is usually ...

Question 12

Is there a way in bash to read a single line from stdin and write directly to a file? Something like: t="$(mktemp)" while true do [read single line from stdin] > "${t}" [...

Question 13

I have these three text files : #1.txt hey stackoverflow #2.txt hey stackexchange #3.txt hello world I am using this command to list the last 3 files in my dir and then cat them and then save ...

Question 14

I am a student and I am trying an excercise that involves assigning a word with quotes, double quotes and other symbols to a file name. The problem is that I am not getting the expected results. I am ...

Question 15

I know this question has been asked several times but it seems ineffective in my case. [[ ! -t 0 ]] = Does standard input contains anything? This command: echo 'Hello world' | [[ ! -t 0 ]] echo $? ...

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Questions tagged [stdin]

Why does dd read only part of the specified data?

Perl RegEx one-liner that outputs all matches from one line of STDIN

Making `apt-get` read answers from stdin on graphical Ubuntu

Using socat to redirect docker attach's STDIN/STDOUT to a TCP socket

How do I ask gnu parallel to preserve stdin?

What does '-' as a file parameter mean? [duplicate]

Redirecting fifo to python's stdin

Archiving stdout to multiple tapes

Script that reads input from terminal. How to tell the script to print to both tty and stdout in case it is called with a stdout redirection?

How to identify what file descriptors are associated to STDIN, STDOUT etc

Standard input stream redirection

read single line from stdin and write to a file

saving xargs ouput from multi files to one file

Quote characters work as commands that redirect to the standard input

Bash - Check if the standard input contains anything

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