auto clear cache cronjob problem

[Teo]

Hello everyone!

I'm trying to add this cronjob:

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sudo /usr/bin/bash /home/clearcache.sh

user is Admin allowed to run bash, Centos6 the file clearcache.sh (permission 755) contains:

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#!/bin/bash
# Note, we are using "echo 3", but it is not recommended in production instead use "echo 1"
echo "echo 3 > /proc/sys/vm/drop_caches"

the error I get is:

sudo: no tty present and no askpass program specified

I tried this but it doesn't work:
viewtopic.php?t=17707

any thoughts?
thank you!

[skamasle]

That system you use ?

Why not run this specific crons with root user ?