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Added a README file for the systemadmin plugin (#7279)

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* Added a README file for the systemadmin plugin

* Updated formatting of Functions table and split it into
"named" and "unnamed" functions for clarity

* Fixed issue with '|' characters in table by adding them in
<code> stateuents </code>

* Added \ escape characters in front of | characters
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Jeffrey Chandler 2018-10-14 12:40:29 -04:00 committed by Robby Russell
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# Systemadmin plugin
This plugin adds a series of aliases and functions which make a System Administrator's life easier.
To use it, add `systemadmin` to the plugins array in your zshrc file:
```zsh
plugins=(... systemadmin)
```
## Aliases
| Alias | Command | Description |
|--------|-----------------------------------------------------------------------------------|--------------------------------------------------------------------|
| ping | `ping -c 5` | Sends only 5 ICMP Messages |
| clr | `clear;echo "Currently logged in on $(tty), as $USER in directory $PWD."` | Clears the screen and prings the current user, TTY, and directory |
| path | `echo -e ${PATH//:/\\n}` | Displays PATH with each entry on a separate line |
| mkdir | `mkdir -pv` | Automatically create parent directories and display verbose output |
| psmem | <code>ps -e -orss=,args= \| sort -b -k1,1n</code> | Display the processes using the most memory |
| psmem10| <code>ps -e -orss=,args= \| sort -b -k1,1n\| head -10</code> | Display the top 10 processes using the most memory |
| pscpu | <code>ps -e -o pcpu,cpu,nice,state,cputime,args\|sort -k1 -nr</code> | Display the top processes using the most CPU |
| pscpu10| <code>ps -e -o pcpu,cpu,nice,state,cputime,args\|sort -k1 -nr \| head -10</code> | Display the top 10 processes using the most CPU |
| hist10 | <code>print -l ${(o)history%% *} \| uniq -c \| sort -nr \| head -n 10</code> | Display the top 10 most used commands in the history |
## Named Functions
These are used by some of the other functions to provide flexibility
| Function | Description |
|-------------|---------------------------------------------------------------------------------------------------------------------------------------|
| retval | Returns the first argument or a '.' if no arguments are specified |
| retlog | Returns the first argument or /var/log/nginx/access.log if no arguments are specified |
## Unamed Functions
These functions are closer to aliases with complex arguments simplified (in most cases) into one line
| Function | Description |
|-------------|---------------------------------------------------------------------------------------------------------------------------------------|
| dls | List only directories in the current directory |
| psgrep | List all processes that match the pattern input after the command |
| killit | xargs sudo kill | Kills any process that matches a regulr expression passed to it |
| tree | List contents of directories in a tree-like format (if tree is installed) |
| sortcons | Sort connections by state |
| con80 | View all 80 Port Connections |
| sortconip | On the connected IP sorted by the number of connections |
| req20 | List the top 20 requests on port 80 |
| http20 | List the top 20 connections to port 80 based on tcpdump data |
| timewait20 | List the top 20 time_wait connections |
| syn20 | List the top 20 SYN connections |
| port_pro | Output all processes according to the port number |
| accessip10 | List the top 10 accesses to the ip address in the nginx/access.log file or another log file if specified as an argument |
| visitpage20 | List the top 20 most visited files or pages in the nginx/access.log file or another log file if specified as an argument |
| consume100 | List the top 100 of Page lists the most time-consuming (more than 60 seconds) as well as the corresponding page number of occurrences |
| webtraffic | List website traffic statistics in GB from tne nginx/access.log file or another log file if specified as an argument |
| c404 | List statistics on 404 connections in the nginx/access.log file or another log file if specified as an argument |
| httpstatus | List statistics based on http status in the nginx/access.log file or another log file if specified as an argument |
| d0 | Delete 0 byte files recursively in the directory specified (or current directory if none is specificied) |
| geteip | Gather information regarding an external IP address |
| getip | Determine the local IP Address with `ip addr` or `ifconfig` |
| clrz | Clear zombie processes |
| conssec | Display the number of concurrent connections per second in the nginix/access.log file or another log file if specified as an argument |