Hide output from cronjobs running in background [closed] - linux

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Closed 3 years ago.
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I have few python cronjobs running at a regular interval, set up in crontab. Now I have crond -b running in the background. However, I get following message printed on the console for every run of the cronjob
crond[27827]: USER root pid 27829 cmd python mypythonscript.py
How can I hide these outputs from appearing in the console?

I believe this is crond writing the syslogs and nothing to do with redirecting logs to /dev/null. You could try editing /etc/sysconfig/crond file to set CRONDARGS to
CRONDARGS="-s off"

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How to code a shell script to run a program when the system login? [closed]

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Closed 6 years ago.
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I have write a python program that display the radio frequency, how to code a shell script to run it when the system login?
you can see step by step on this link :
https://embeddedday.com/projects/raspberry-pi/a-step-further/running-python-script-at-boot/
also here stackoverflow Link : Run Python script at startup in Ubuntu

how to trace a shell script running the background? [closed]

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Closed 6 years ago.
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I have run a script like this:
script.sh > terminal.txt 2>&1 &
It contains long loops.
how can I trace (which process with what name and what id was created) that script and kill the process to terminate that?
Type fg in the terminal. Then type Ctrl+c.
See: Job Control Commands
Though, #hek2mgl 's answer was great help and paved the way to solution, but the actual solution is a bit different:
Type fg in the terminal.
Then type Ctrl+z.

How to log terminal keystrokes in ubuntu [closed]

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Closed 8 years ago.
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I want to log whatever is happening in my terminal in a text file . I want to save all session information in the log file. We can do this in putty. But I dont know how to achieve the same in simple terminal in ubuntu. Also, is it possible to use putty to open a terminal for localhost? I tried doing that . But does not work.
You can record your terminal session (assuming you're using Bash) by doing script.
You probably want script -k which records input and output.
So in all, doing something like script -k logfilename you will get what you want!

Linux task in the background finishes [closed]

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Closed 8 years ago.
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I have got a Linux task that finishes and prints:
[6]- Done
I have noticed that in the past it would print:
[6]+ Done
Is there any difference between + and -?
man bash states:
In output pertaining to jobs (e.g., the output of the jobs command), the current job is always flagged with a +, and the previous job with a -.
Therefore, the command with '+' is the most recent command sent to the background.

How can i stop someone from spamming my console using the write command in linux [closed]

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Closed 8 years ago.
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How can I block someone from spamming by console using the "write" command in unix.
Run the command mesg n. Preferably, add it to your .bashrc or equivalent so it runs when you start up.
In your console, type:
mesg n
For more information, read the manual pages (man mesg).

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