[How To?] Run shell script and get output into another shell.
Hi guys,
I have a simple question, I want to store the output of the following command:
Quote:
sudo iotop -t 0 -C 3 | grep "load: "
As you can see it is running all the time, and we get a new line every 3sec.
I just want to store these new lines into a single variable, so I can use it into a script.
To clear the screen, and do not print lines after the others when iotop is running just delete "- C".
I DO NOT WANT TO STORE THE OUTPUT ON THE DRIVE!!! I DO NOT WANT TO KILL IOTOP, IT MUST BE RUNNING ALL THE TIME IN BACKGROUND!!!
The idea is to do not write on the drive! Just store the output into a single variable called $Activity.
For example:
But the fact is that nothing can be stored into Activity
So I have tried to know if something can be done to read the last output of a specified PID. But I need help on that point too :-/ I don't know how to do it.
Please help...
---------- Post updated at 09:57 AM ---------- Previous update was at 02:02 AM ----------
Hi ,
I am having one situation in which I need to run some simple unix commands after doing "chroot" command in a shell script. Which in turn creates a new shell.
So scenario is that
- I need to have one shell script which is ran as a part of crontab
- in this shell script I need to do a... (2 Replies)
Hi Perl/UNIX experts,
I have a problem in running a shell script from my perl script (auto.pl).
I run the perl script using
perl auto.pl
from the shell prompt
The shell script picks the files in "input" folder and procesess it.
The shell script blue.sh has this code.
export... (16 Replies)
i have a small problem getting a batxh shell script to run in shell
this is the code
the problem seems to be centered around the ffmpeg command, something maybe to do with the ' ' wrapping around the vhook part command
this is a strange problem , if i take the ffmpeg command and... (1 Reply)
Hi,
I am using HP-UNIX.
I have a requirement as below
I have to change env twice like:
cadenv <env>
cadenv <env>
ccm start -d /dbpath
ccm tar -xvf *.tar
ccm rcv ....
mv *.tar BACKUP
but after I do the first cadenv <env> , I am unable to execute any of the later commands .
... (6 Replies)
Hi ,
I Have Installed Red Hat Linux 5(Guest O.S) In Vmware And Host O.S Is Windows 7 .I Am Unable To Run Script File In It Is Giving Error E32: No File Name.For All Basic Commands It's Working
Fine Like Cat ,Cmp.,etc .
I Logging As Root User And Working Under The Directory I Am Using... (3 Replies)
I need to run a local shell script on a remote machine. I am able to achieve that by executing the command
> ssh -qtt user@host < test.sh
However, when I try to pass arguments to test.sh it fails.
Any pointers would be appreciated. (7 Replies)
I want to run sql query in shell script and output data save as delimited text (delimited text would be comma)
Code:
SPOOL_FILE=/pgedw/dan.txt
SQL=/pgedw/dan.sql
sqlplus -s username/password@myhost:port/servicename <<EOF
set head on
set COLSEP ,
set linesize 32767
SET TRIMSPOOL ON
SET... (8 Replies)
Hi Guys,
I am very new to shell script and I need your help here to write a script. Actually, I have a script abc.sh which don't get terminated itself. So I need to design a script to run this script, save the output to a file, search for a given string in the output and if it exists send those... (11 Replies)
Linux System having all Perl, Python, PHP (and Ruby) installed
From a Shell script, can call a Perl, Python, PHP (or Ruby ?) file
eg
eg
a Shell script run in a case statement call to run a php file, also Perl or/and Python file???
Like
#!/usr/bin/bash
....
....
case $INPUT_STRING... (1 Reply)
Discussion started by: hoyanet
1 Replies
LEARN ABOUT LINUX
iotop
IOTOP(8) System Manager's Manual IOTOP(8)NAME
iotop - simple top-like I/O monitor
SYNOPSIS
iotop [OPTIONS]
DESCRIPTION
iotop watches I/O usage information output by the Linux kernel (requires 2.6.20 or later) and displays a table of current I/O usage by pro-
cesses or threads on the system. At least the CONFIG_TASK_DELAY_ACCT, CONFIG_TASK_IO_ACCOUNTING, CONFIG_TASKSTATS and CONFIG_VM_EVENT_COUN-
TERS options need to be enabled in your Linux kernel build configuration.
iotop displays columns for the I/O bandwidth read and written by each process/thread during the sampling period. It also displays the per-
centage of time the thread/process spent while swapping in and while waiting on I/O. For each process, its I/O priority (class/level) is
shown. In addition, the total I/O bandwidth read and written during the sampling period is displayed at the top of the interface.
Use the left and right arrows to change the sorting, r to reverse the sorting order, o to toggle the --only option, p to toggle the --pro-
cesses option, a to toggle the --accumulated option, q to quit or i to change the priority of a thread or a process' thread(s). Any other
key will force a refresh.
OPTIONS --version
Show the version number and exit
-h, --help
Show usage information and exit
-o, --only
Only show processes or threads actually doing I/O, instead of showing all processes or threads. This can be dynamically toggled by
pressing o.
-b, --batch
Turn on non-interactive mode. Useful for logging I/O usage over time.
-n NUM, --iter=NUM
Set the number of iterations before quitting (never quit by default). This is most useful in non-interactive mode.
-d SEC, --delay=SEC
Set the delay between iterations in seconds (1 second by default). Accepts non-integer values such as 1.1 seconds.
-p PID, --pid=PID
A list of processes/threads to monitor (all by default).
-u USER, --user=USER
A list of users to monitor (all by default)
-P, --processes
Only show processes. Normally iotop shows all threads.
-a, --accumulated
Show accumulated I/O instead of bandwidth. In this mode, iotop shows the amount of I/O processes have done since iotop started.
-k, --kilobytes
Use kilobytes instead of a human friendly unit. This mode is useful when scripting the batch mode of iotop. Instead of choosing the
most appropriate unit iotop will display all sizes in kilobytes.
-t, --time
Add a timestamp on each line (implies --batch). Each line will be prefixed by the current time.
-q, --quiet
suppress some lines of header (implies --batch). This option can be specified up to three times to remove header lines.
-q column names are only printed on the first iteration,
-qq column names are never printed,
-qqq the I/O summary is never printed.
SEE ALSO ionice(1), top(1), vmstat(1), atop(1), htop(1)AUTHOR
iotop was written by Guillaume Chazarain.
This manual page was started by Paul Wise for the Debian project and is placed in the public domain.
April 2009 IOTOP(8)