combusean

[root@ip-172-16-20-13 ~]# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
169.254.255.1   0.0.0.0         255.255.255.255 UH        0 0          0 tun0
172.16.20.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth0
172.17.0.0      169.254.255.1   255.255.0.0     UG        0 0          0 tun0
0.0.0.0         172.16.20.1     0.0.0.0         UG        0 0          0 eth0

[root@ip-172-17-20-47 ~]# netstat -rn

combusean

salt_cmd = if return_code 
  "salt -t #{SALT_TIMEOUT} -L --out=yaml '#{key}' cmd.retcode 'export HOME=#{@home}; #{cmd} 2>> #{@remote_log}'"
else
  "salt -t #{SALT_TIMEOUT} -L --out=yaml '#{key}' cmd.run '#{cmd}'"
end

combusean

#!/bin/sh
#
# nginx - this script starts and stops the nginx daemon for Red Hat-based distributions
#
# chkconfig:   - 85 15 
# description:  Nginx is an HTTP(S) server, HTTP(S) reverse \
#               proxy and IMAP/POP3 proxy server
# processname: nginx
# config:      /etc/nginx/nginx.conf
# config:      /etc/sysconfig/nginx

combusean

Explain as much as possible what's going on in the following real-world terminal session. 

Guidance:  

Tell us what Linux distros these might be by what their PS1 is or are based off.

What are the vars in each prompt used to produce it?  

In ssh, why did we get an X11 error once and what does -C and -X do?  

combusean

-    salt_cmd = "salt -L '#{key}' cmd.retcode 'export HOME=#{@home}; #{cmd} >> #{@local_log}'"
-    unless redirect
-      salt_cmd = "salt '#{key}' cmd.run '#{cmd}'"
-    end
+    salt_cmd = redirect ? "salt -L '#{key}' cmd.retcode 'export HOME=#{@home}; #{cmd} >> #{@local_log}'" : "salt '#{key}' cmd.run '#{cmd}'"

combusean

class Fib
  
  @tracking = [0,1]
  
  def self.iter_compute(index)
    tracking = [0,1]   
    index.times do |i|
      tracking << tracking[-2] + tracking[-1]
      tracking.shift if tracking.size > 2
    end

combusean

1)  Run

brew install source-highlight

Presuming you are using brew, of course. 

2) Create the file /usr/local/share/source-highlight/src-hilite-lesspipe.sh
   with the following as its contents

#!/bin/bash