Compress file in SSH
The below will compress a file or folder in .tar.gz format in SSH.
tar -zcvf <new_tar_filename>.tar.gz <filename/directory>
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About this user
Sasha http://nothing-less.net
Migrate a site to another server
Use the code below in SSH to migrate all the files of a site from one server to another, without having to download/upload them.
wget -rc --level=20 ftp://username:password@olddomain.net/public_html
Migrate a MySQL Database to another server
Use the below in SSH to move a MySQL database between servers. Super handy if the database is larger than 7MB and you can't use phpMyAdmin.
http://wiki.dreamhost.com/index.php/Migrate_MySQL
mysqldump -h oldhost -u oldusername -poldpassword olddbname | mysql -h newhost -u newusername -pnewpassword newdbname
http://wiki.dreamhost.com/index.php/Migrate_MySQL
Search for terms in Domlogs
How to search for certain terms in your Domlogs, using SSH.
-OR-
Replace wget with other file names/terms you might want to search for.
If that takes too long, try doing it one by one:
Alternatively, if you get an error like "Argument list too long":
Then simply take a look at this file /root/grep-domlogs-results.txt
for files in /usr/local/apache/domlogs/*; do grep "wget" $files; done;
-OR-
cd /usr/local/apache/domlogs grep wget * grep lynx * grep curl *
Replace wget with other file names/terms you might want to search for.
If that takes too long, try doing it one by one:
grep wget a* grep wget b* grep wget c* grep wget d* grep wget e* grep wget f* grep wget g* grep wget h* grep wget i* grep wget j* grep wget k* grep wget l* grep wget m* grep wget n* grep wget o* grep wget p* grep wget q* grep wget r* grep wget s* grep wget t* grep wget v* grep wget w* grep wget x* grep wget y* grep wget z*
Alternatively, if you get an error like "Argument list too long":
for i in `ls /usr/local/apache/domlogs|grep -v 'bytes_log'`; do echo "checking on $i" && grep wget /usr/local/apache/domlogs/$i && grep lynx /usr/local/apache/domlogs/$i && grep curl /usr/local/apache/domlogs/$i; done > /root/grep-domlogs-results.txt
Then simply take a look at this file /root/grep-domlogs-results.txt
Looking up recent dictionary attacks
Use the code below to look up what words were used in recent dictionary attacks using SSH.
grep "dictionary attack" /var/log/exim_mainlog
Looking into DOS and DDOS Attacks
A good guide to what to do when your server is attacked.
If there are many httpd processes showing up after step 1, you might be under attack. If you get high numbers for the second one, you are almost definitely under attack. Use the third one to see the IP addresses, and then ban them from the server:
Also try the following for fixing stuff:
And delete anything that's not supposed to be there.
top -d2 netstat -nap | grep SYN | wc -l netstat -nap | less
If there are many httpd processes showing up after step 1, you might be under attack. If you get high numbers for the second one, you are almost definitely under attack. Use the third one to see the IP addresses, and then ban them from the server:
iptables -A INPUT -s ip.address -j DROP
Also try the following for fixing stuff:
cd /dev/shm ls
And delete anything that's not supposed to be there.
locate bindz locate botnet.txt locate dc locate ex0.pl locate kaiten locate r0nin locate udp.pl locate ... lsof | grep ., locate mybot
Ban IPs from a server
Use the code below to permanently ban an IP address from accessing your server.
iptables -A INPUT -s ip.address -j DROP
How to tail logs
tail -200 /var/log/exim_mainlog tail -200 /usr/local/apache/logs/error_log
To watch the log get updated in real time:
tail -f /var/log/messages
Sims 2 File Limit Fix
Type this into Terminal in Mac OSX to fix the file size limit for The Sims 2, allowing you to have more than 5000 downloads.
sudo sysctl -w kern.maxfiles=22000 sudo sysctl -w kern.maxfilesperproc=20000
How To Manually Update Cpanel
/scripts/upcp /scripts/upcp --force
