Input Redirection Post: 24228

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

input redirection question

Hi, in my script I need to execute the following command: query $id 456 432 but it waits for a RETURN character from keyboard and therefore, it fails. I tried something like: query $id 456 432 << '\n' but, i'ts clear it is not correct. Is there any way to do this? Thxs.

2. Shell Programming and Scripting

permanent redirection of standard input

while running a user inter-active program how can we get the commands from a file instead of the user? is there anyway to permanently redirect content of a file to standard input?

3. UNIX for Advanced & Expert Users

password required when using input redirection

Hello, I need to change user and run some commands by using a script. lets say, I'm using su - someuser << start password required -----> how can I enter the password here command 1 command 2 command 3 command 4 start While trying to run this I got the following message: "standard...

4. Shell Programming and Scripting

Input redirection and for loop

Hello, I need help with a bash script that I try to improve. I could not find answer so far, maybe because I'm not to familiar with the terminology so feel free to correct my language. I have a script that looks like: NODES="node_a node_b node_c" for NODE in $NODES do ...

5. Shell Programming and Scripting

How to check for Input Redirection in my script?

All, I have a requirement to write a script where I check for Input redirection when the script was executed, based on which I handle my logic. Below is the example: my.script #! /bin/ksh # Not sure how to frame the if condition below if ; then echo "Input Redirected from a file" ...

6. UNIX for Dummies Questions & Answers

Send job to Background after input redirection

Hi, I am having issues with syntax when I am trying to send a job to the background after a input redirection. I have this script which sends some files to different servers after zipping them. Once I execute it, it will ask for user input as of which server the files need to go to. (The...

7. UNIX for Dummies Questions & Answers

Redirection of file input to command

Hello, I'm new to Unix (working with OS X 10.8.5) and therefore at the beginning of my adventure. If I ask something stupid, then this is not intentional, but simple nescience. :rolleyes: I have a problem with the redirection of text file content to echo. I was experimenting with redirection...

8. UNIX for Dummies Questions & Answers

When do I use input redirection?

Can someone please explain when input redirection is necessary? For example, "cat filename" and "cat< filename" produce the same result. I was told that if I need to bunzip a file that I should type "bunzip2<filename.bz2." However, if I omit the "<" I still get the same result. Can someone...

9. Shell Programming and Scripting

Input redirection script

Hi, #!/bin/bash while ; do rm -f /tmp/pipe mkfifo /tmp/pipe ./yuv4mpeg_to_v4l2 < /tmp/pipe & mplayer tom_and_jerry.mp4 -vf scale=480:360 -vo yuv4mpeg:file=/tmp/pipe sleep 65; done When I run this - after mplayer finishes playing video it says - Exiting... (End of...

10. Shell Programming and Scripting

Input redirection within bash script

Hi, when I try to redirect input and the command is described as a string within an array redirection does not work. why? #!/bin/bash dir=("tail < ./hello.txt") tail < ./hello.txt #works ${dir} #does not work

LEARN ABOUT MOJAVE

memory_pressure

MEMORY_PRESSURE(1)					    BSD General Commands Manual 					MEMORY_PRESSURE(1)

NAME

     memory_pressure -- Tool to apply real or simulate memory pressure on the system.

SYNOPSIS

     memory_pressure [-l level] | [-p percent_free] | [-S -l level]

OPTIONS

     -l <level> Apply real or simulate memory pressure (if specified alongside simulate argument) on the system till low memory notifications cor-
     responding to <level> are generated. Supported values are "warn" and "critical".

     -p <percent_free> Allocate memory till the available memory in the system is <percent_free> of total memory. If the percentage of available
     memory to total memory on the system drops, the tool will free memory till either the desired percentage is achieved or it runs out of memory
     to free.

     -S Simulate memory pressure on the system by placing it artificially for <sleep_seconds> duration at the "warn" or "critical" level.

     -s <sleep_seconds> Duration to wait before allocating or freeing memory if applying real pressure. In case of simulating memory pressure,
     this is the duration the system will be maintained at an artifical memory level.

DESCRIPTION

     A tool to apply real or simulate memory pressure on the system

SEE ALSO

     vm_stat(1)

Mac OS X							    Mar 7, 2013 							  Mac OS X

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

input redirection question

Discussion started by: luistid

2. Shell Programming and Scripting

permanent redirection of standard input

Discussion started by: gfhgfnhhn

3. UNIX for Advanced & Expert Users

password required when using input redirection

Discussion started by: Alalush

4. Shell Programming and Scripting

Input redirection and for loop

Discussion started by: pn8830