# ------------------------------------------------------------------------------
  # Description
  # -----------
  #
  # This is one for the system administrator, operation and maintenance.
  # Some of which come from http://justinlilly.com/dotfiles/zsh.html
  #
  # ------------------------------------------------------------------------------
  # Authors
  # -------
  #
  # * Dongweiming <ciici123@gmail.com>
  #
  # ------------------------------------------------------------------------------
  
  function retval() {
      if [[ -z $1 ]];then
          echo '.'
      else
          echo $1
      fi
  }
  
  function retlog() {
      if [[ -z $1 ]];then
          echo '/var/log/nginx/access.log'
      else
          echo $1
      fi
  }
  
  alias ping='ping -c 5'
  alias clr='clear;echo "Currently logged in on $(tty), as $USER in directory $PWD."'
  alias path='echo -e ${PATH//:/\
  }'
  alias mkdir='mkdir -pv'
  # get top process eating memory
  alias psmem='ps -e -orss=,args= | sort -b -k1,1n'
  alias psmem10='ps -e -orss=,args= | sort -b -k1,1n| head -10'
  # get top process eating cpu if not work try excute : export LC_ALL='C'
  alias pscpu='ps -e -o pcpu,cpu,nice,state,cputime,args|sort -k1 -nr'
  alias pscpu10='ps -e -o pcpu,cpu,nice,state,cputime,args|sort -k1 -nr | head -10'
  # top10 of the history
  alias hist10='print -l ${(o)history%% *} | uniq -c | sort -nr | head -n 10'
  
  # directory LS
  dls () {
      ls -l | grep "^d" | awk '{ print $9 }' | tr -d "/"
  }
  psgrep() {
      ps aux | grep "$(retval $1)" | grep -v grep
  }
  # Kills any process that matches a regexp passed to it
  killit() {
      ps aux | grep -v "grep" | grep "$@" | awk '{print $2}' | xargs sudo kill
  }
  
  # list contents of directories in a tree-like format
  if [ -z "\${which tree}" ]; then
    tree () {
        find $@ -print | sed -e 's;[^/]*/;|____;g;s;____|; |;g'
    }
  fi
  
  # Sort connection state
  sortcons() {
      netstat -nat |awk '{print $6}'|sort|uniq -c|sort -rn
  }
  
  # View all 80 Port Connections
  con80() {
      netstat -nat|grep -i ":80"|wc -l
  }
  
  # On the connected IP sorted by the number of connections
  sortconip() {
      netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
  }
  
  # top20 of Find the number of requests on 80 port
  req20() {
      netstat -anlp|grep 80|grep tcp|awk '{print $5}'|awk -F: '{print $1}'|sort|uniq -c|sort -nr|head -n20
  }
  
  # top20 of Using tcpdump port 80 access to view
  http20() {
      sudo tcpdump -i eth0 -tnn dst port 80 -c 1000 | awk -F"." '{print $1"."$2"."$3"."$4}' | sort | uniq -c | sort -nr |head -20
  }
  
  # top20 of Find time_wait connection
  timewait20() {
      netstat -n|grep TIME_WAIT|awk '{print $5}'|sort|uniq -c|sort -rn|head -n20
  }
  
  # top20 of Find SYN connection
  syn20() {
      netstat -an | grep SYN | awk '{print $5}' | awk -F: '{print $1}' | sort | uniq -c | sort -nr|head -n20
  }
  
  # Printing process according to the port number
  port_pro() {
      netstat -ntlp | grep "$(retval $1)" | awk '{print $7}' | cut -d/ -f1
  }
  
  # top10 of gain access to the ip address
  accessip10() {
      awk '{counts[$(11)]+=1}; END {for(url in counts) print counts[url], url}' "$(retlog)"
  }
  
  # top20 of Most Visited file or page
  visitpage20() {
      awk '{print $11}' "$(retlog)"|sort|uniq -c|sort -nr|head -20
  }
  
  # top100 of Page lists the most time-consuming (more than 60 seconds) as well as the corresponding page number of occurrences
  consume100() {
      awk '($NF > 60 && $7~/\.php/){print $7}' "$(retlog)" |sort -n|uniq -c|sort -nr|head -100
      # if django website or other webiste make by no suffix language
      # awk '{print $7}' "$(retlog)" |sort -n|uniq -c|sort -nr|head -100
  }
  
  # Website traffic statistics (G)
  webtraffic() {
      awk "{sum+=$10} END {print sum/1024/1024/1024}" "$(retlog)"
  }
  
  # Statistical connections 404
  c404() {
      awk '($9 ~/404/)' "$(retlog)" | awk '{print $9,$7}' | sort
  }
  
  # Statistical http status.
  httpstatus() {
      awk '{counts[$(9)]+=1}; END {for(code in counts) print code, counts[code]}' "$(retlog)"
  }
  
  # Delete 0 byte file
  d0() {
      find "$(retval $1)" -type f -size 0 -exec rm -rf {} \;
  }
  
  # gather external ip address
  geteip() {
      curl http://ifconfig.me
  }
  
  # determine local IP address
  getip() {
      ifconfig  | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1}'
  }
  
  # Clear zombie processes
  clrz() {
      ps -eal | awk '{ if ($2 == "Z") {print $4}}' | kill -9
  }
  
  # Second concurrent
  conssec() {
      awk '{if($9~/200|30|404/)COUNT[$4]++}END{for( a in COUNT) print a,COUNT[a]}' "$(retlog)"|sort -k 2 -nr|head -n10
  }