Add these lines into .htaccess

RewriteEngine On

RewriteCond %{QUERY_STRING}    ^.*(;|<|>|’|”|\)|%0A|%0D|%22|%27|%3C|%3E|%00).*(/\*|union|select|insert|cast|set|declare|drop|update|md5|benchmark).* [NC]
RewriteRule .* – [F]

Login to the Mysql prompt :

mysql > select * from table INTO OUTFILE ‘/tmp/test.txt’;

This command will create a test.txt file in /tmp directory.

To check avilable memory in Linux type free -m command. free displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel.

free -m
free -b
free -k

1. The -b switch displays the amount of memory in bytes
2. The -k switch (set by default) displays it in kilobytes
3. The -m switch displays it in megabytes
4. The -g switch displays it in gigabytes.

vmstat

Output

procs ———–memory———- —swap– —–io—- -system– —-cpu—-
r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
0  0      0  63316 176624 1062340    0    0    25    18   39  592  5  1 94  0

1. swpd: the amount of virtual memory used.
2. free: the amount of idle memory.
3. buff: the amount of memory used as buffers.
4. cache: the amount of memory used as cache.

To Check CPU Speed in Linux

less /proc/cpuinfo
egrep  ‘GHz|MHz’ /proc/cpuinfo

After installing a new Linux system or after configuring a new network services/server, you may need to verify which ports are listing on systems network interface including binding.

Use any one of the following command to find this information:
Code:

lsof -i
nmap localhost
netstat -an
netstat -tulpn
nmap -sT -O localhost

If you find or see unwanted open port, it can be confirmation of an intrusion or cracker in your system.

For more advance usage or adventure with these commends read man pages of corresponding commands.

To start
/usr/local/cpanel/3rdparty/mailman/bin/mailmanctl start,

To stop
/usr/local/cpanel/3rdparty/mailman/bin/mailmanctl stop

To disable ping

echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all
To enable ping
echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all