mdadm --monitor --scan --mail=MAIL@DOMAIN.com --delay=3600 --daemonize --test

iptables -I INPUT -p tcp --dport 80 -i eth0 -m state --state NEW -m recent --set
 
iptables -I INPUT -p tcp --dport 80 -i eth0 -m state --state NEW -m recent --update --seconds 60 --hitcount 20 -j DROP

[root@server ~]# netstat -alpn| grep ":80"| awk '{ print $5 }'| cut -d: -f4| sort| uniq -c | sort -n
      1 *
      3 66.249.72.131
     16 81.100.74.82
     17 82.12.246.158
     19 212.183.140.13
     19 78.148.123.94
     20 85.211.47.252
     20 86.166.141.234
     20 87.97.215.7
     20 89.253.191.173
     20 91.92.170.172
     20 94.156.57.170
     20 94.169.158.18
     22 77.78.11.99

iptables -L INPUT -n --line-numbers

[root@server ~]# iptables -L INPUT -n --line-numbers
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination         
1    DROP       tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:80 state NEW recent: UPDATE seconds: 60 hit_count: 20 name: DEFAULT side: source 
2               tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:80 state NEW recent: SET name: DEFAULT side: source 
3    fail2ban-SSH  tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:22 
4    DROP       all  --  67.195.0.0/24        0.0.0.0/0           
[root@server ~]#

iptables -D INPUT 1

netstat -alpn| grep ":80"| awk '{ print $5 }'| cut -d: -f4| sort| uniq -c | sort -n

# don't put duplicate lines in the history. See bash(1) for more options
# don't overwrite GNU Midnight Commander's setting of `ignorespace'.
export HISTCONTROL=$HISTCONTROL${HISTCONTROL+,}ignoredups
# ... or force ignoredups and ignorespace
export HISTCONTROL=ignoreboth
 
# append to the history file, don't overwrite it
shopt -s histappend
 
# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
 
# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

export PATH
export HISTTIMEFORMAT='%F %T '
HISTSIZE=100000        # history size use big motherfucker size
HISTFILESIZE=1000      # file log size
HISTCONTROL=erasedups # dont dublucate 
HISTCONTROL=ignorespace #ignorepsaces
DATA=`date`                   # variable for `date`
 
HISTFILE=~/.bash_history.$DATA  # histfile will look .bash_histori + command `date`

genpasswd() {
        local l=$1
        [ "$l" == "" ] && l=20 
        tr -dc A-Za-z0-9-!@%^*_ < /dev/urandom | head -c ${l} | xargs
}
function calc () {
        { echo "$*" | bc -l; }
}
 
 
alias ls='ls --color'
# i want my grep to color my search word and exclude my grep command
alias grep='grep -v grep | grep --color=auto'
alias fgrep='fgrep --color=auto'
alias egrep='egrep --color=auto'

[14:21]vhristev@hristev:~$ genpasswd
nHwl*W8Yp4v__T-whmn2
[14:21]vhristev@hristev:~$ calc 54-4
50
[14:21]vhristev@hristev:~$ ps aux | grep nginx
root      1920  0.0  0.2  27772  1084 ?        Ss   Mar10   0:00 nginx: master process /usr/sbin/nginx
www-data  1921  0.0  0.4  28700  2416 ?        S    Mar10   0:01 nginx: worker process
www-data  1922  0.0  0.4  28536  2280 ?        S    Mar10   0:01 nginx: worker process
www-data  1925  0.0  0.4  28536  2244 ?        S    Mar10   0:02 nginx: worker process
www-data  1926  0.0  0.4  28536  2252 ?        S    Mar10   0:02 nginx: worker process
[14:22]vhristev@hristev:~$

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[33[00;31m\]\u@\[33[01;32m\]\h\[33[00m\]:\[33[01;34m\]\w\[33[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt
 
# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[33[0;35m\]\[33[01;33m\][\A]\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac

    * \a : an ASCII bell character (07)
 
    * \d : the date in "Weekday Month Date" format (e.g., "Tue May 26")
 
    * \D{format} : the format is passed to strftime(3) and the result is inserted into the prompt string; an empty format results in a locale-specific time representation. The braces are required
 
    * \e : an ASCII escape character (033)
 
    * \h : the hostname up to the first '.'
 
    * \H : the hostname
 
    * \j : the number of jobs currently managed by the shell
 
    * \l : the basename of the shell’s terminal device name
 
    * \n : newline
 
    * \r : carriage return
 
    * \s : the name of the shell, the basename of $0 (the portion following the final slash)
 
    * \t : the current time in 24-hour HH:MM:SS format
 
    * \T : the current time in 12-hour HH:MM:SS format
 
    * \@ : the current time in 12-hour am/pm format
 
    * \A : the current time in 24-hour HH:MM format
 
    * \u : the username of the current user
 
    * \v : the version of bash (e.g., 2.00)
 
    * \V : the release of bash, version + patch level (e.g., 2.00.0)
 
    * \w : the current working directory, with $HOME abbreviated with a tilde
 
    * \W : the basename of the current working directory, with $HOME abbreviated with a tilde
 
    * \! : the history number of this command
 
    * \# : the command number of this command
 
    * \$ : if the effective UID is 0, a #, otherwise a $
 
    * \nnn : the character corresponding to the octal number nnn
 
    * \\ : a backslash
 
    * \[ : begin a sequence of non-printing characters, which could be used to embed a terminal control sequence into the prompt
 
    * \] : end a sequence of non-printing characters

ps aux | grep dumper | kill `awk '{print $2}'`