I recently had to change web hosts because my domain came under a massive DoS attack. I have no idea why they are specifically attacking my website. I even changed the domain and they still followed me there. The problem is with shared hosting, once the attack begins, it crashes the whole server, & none of the companies I hosted my website at seem to be able to stop the attack. Some are recommending a dedicated server, however, I can't afford one right now and for a blog that is two weeks old it seems unnecessary and that would be giving in to the attackers. So did anyone go through such problem before, and what shared hosting do you recommend that can stop such attacks (although I doubt such host exists)?
I am currently with liquidweb. Their support is great, and they did their best to stop the attack, however the attack is so persistent from thousands of ips and they keep recommending a dedicated server.
1) #> nano /var/spool/cron/root Then type in the cron entry and save it #> service crond restart It cannot work if have not restart crond
2) #> crontab -e Then type in the cron entry and save it
3) #> nano /etc/crontab type in the cron entry and save it
I can use above three method without any problem.
However I cannot use crontab [filepath] method
4) #> crontab /home/admin/domain.com/www/testing/crontab.dat *crontab.dat is a cron entry. after type in this line, I use crontab -l and see cron entry has been added to /var/spool/cron/root However, the cron job will not run even I restart crond.
A few days ago, all cron jobs stopped working, probably because of a certain setting that my host changed. I contacted my host, and he replied that the format i'm using for the commands was not proper, and he gave me the proper command as:
I tried it, but it didnt work....
I googled the problem and got tens of commands... i simply wanna run a PHP file (the file itseld is functional if i browse it) every now and then, so what is the command i should be using?
also,i m looking for a specific cron right now (xbt_cron).once i find it ,what command do i use to run it manually.its supposed to run by itself..i just moved to a new server last week and now its stopped working.
Anyone can explain what are the purpose for these command, and should I make any changes to these to standardize them all (the time)
Secondly, one of my server doesn't set any automatic CPanel updates, so I set automatic updates for CPanel packages and Security packages. Is it suppose to add "/scripts/upcp" into my crontab? Most of them are also at different time.
I assume this command is to inform me whenever my user make a new domain add-on? /usr/local/cpanel/whostmgr/docroot/cgi/cpaddons_report.pl --notify
Also can anyone tell me what are the purpose of these? /usr/local/bandmin/bandmin /usr/local/bandmin/ipaddrmap /usr/local/cpanel/bin/dcpumon >/dev/null 2>&1 /scripts/exim_tidydb > /dev/null 2>&1 /usr/local/cpanel/whostmgr/bin/dnsqueue > /dev/null 2>&1
I set up a cron to run every minute & I'm running a PHP script by way of cron like
Now does each request of Cron is a seperate HTTP Request or what? Say my script takes more than 1 minute to execute completely but before its completed, its called again. So, will that effect the PHP script running because of previous HTTP Request or will it create a new HTTP Request & let the previous request finish its operation? Technically, it shouldn't block/affect the previous request, but I'm not sure!!
I noticed on my new servers users doesnt have crontab permission.On my first server they have access.So what i need to do to enable users crontab permission automaticly on new servers?I have whm/cpanel there but it seems there is nothing about it there.
I am trying to edit crontab using crontab -e, I seem to get to it okay but I am unable to edit anything in there, at the end of the file there are ~ in there, and I cant even delete them. Its like the file is locked.
I am trying to setup a cronjob but cPanel, (Linux Centos 5), tells me that user/bin/crontab permissions are incorrect and need to be changed to 4755 - I try to change permissions in WinSCP [Properties] but it doesn't 'take'.
how to force a change of permissions with SSH (Putty)
I have root ssh access to a server and we notice when doing a bash ./mysq-backup script to dump the data from the web site's databases into .sql and .tgz them that httpd goes down sometimes. That, and sometimes it seems that httpd goes down in other situations. All fine, we will figure out why. But ..
It would be nice to run a crontab to check every 15 minutes if httpd is running, if not, to restart it.
Right now I when I notice the site is down I log into the ssh as root and type: service httpd restart. If it is up it will then first stop it, and restart it. I can look at the screen and see it happen, so I feel pretty safe doing this. One of my concerns is that when I am not at the screen and it stays down .. I do not notice this and downtime increases. And we don't want to just crontab service httpd restart, so a bash script to check for the pid and restart if it down .. would be nice.
I thought this would work: (chmod 755 httpdcheck)
Code: delta:~ root# cat httpdcheck #!/bin/bash
if [ ! "$(pidof httpd)" ] then echo "Could not find pid of httpd - restarting" service httpd restart else echo "Found pid of httpd - NO need to restart" fi delta:~ root# And I have this crontab entry:
Code: delta:~ root# crontab -l */5 * * * * /root/httpdcheck | mail my@email delta:~ root# When testing, I did service httpd stop and waited 5 minutes and I received the email : could not find it, restarting. But when I go to the web site in browser it remains down. I have to login to ssh and do service httpd start manually to really load it.
Manually loading btw .. shows it works as bash script just fine, so I dont't know why it won't work when run from cron?
Code: delta:~ root# ./httpdcheck Could not find pid of httpd - restarting Stopping httpd: [FAILED] Starting httpd: [ OK ] delta:~ root#
So .. when is it going wrong? Am I forgetting something?