Archive for May, 2009
For basic crontab configurations please click here
Issue1:How to deny a user not to use his/her crontab to schedule his jobs
there is seperate contab file for dening for user open and file and specify users name in that file
#vi /etc/cron.deny
Issue2:Display cron jobs for all users
When migrating from one system to another it is good to know if there are cron jobs from other users on the system, here is how to
what is the difference between soft link and hard link?
what are the advantages with NFS?
What is difference between LILO and GRUB?
How you will troubleshoot if boot partation is missing?
What is crontab?
How you will install MYsql in different ways?
What is the difference beween Mysql5.0 and 4.0 versions?
the host is unreachable how you will resolve this issue?
there is no firewall the host is in same network and dns server
IPtables is vast topic which can not be dealt in one post I will be posting this IPtables in different posts but will link all of them
IPtables basics
Iptables is a securit module in Linux kernel, this Iptables can be used a firewall(filter table),Internet sharing(NAT table),For altering Type Of Service(mangle table) and for non tracking purpose(Raw table)
Firewall definition:
A firewall is a security system consisting of a combination of hardware and software that … Continue Reading
CRONTAB
Crontab is the default scheduling Application/program in most of the Linux/Nix boxes.
Crontab is define as scheduling of programs/scripts/applications with out administrator interventions
Crontab = (Cron)oligical+(tab)le nothing but time table for executing some scripts at that point of time
So where we require crontab?
where there is no need for admin interventions such as taking daily backups sending mails to particular users monitoring network.
So coming to scheduling task crontab … Continue Reading
