Here are the typical Linux commands you would use when you wake up in the morning and are having your first cup of coffee while checking your remote server(s).
Use ssh username@hostname or use ssh username@ipaddress to login to your remote servers when you wake up in the morning.
After logging in it is normally best to cd or “change directory”¯ into your log file directory and check log files.
Now, it is always a good idea to list the files in the directory you are in using the ls command, here we use a long listing ls -l with wildcard match
Using the cat command we can take a look at the contents of text files. In this case, we look at one of the log files.
Seeing nothing of interest or out of the ordinary in our various log file(s), we simply truncate the log files down to 0 bytes like so: truncate -s 0 *log
Let's quickly use the top command to see if there is anything that looks unusual, inspecting web server and database processes, or whatever is your critial application
To leave the top command, press ^c better known as “control c”¯. ^c will often get you out of a jam when you are “stuck”¯ and need a way out
Use the clear command to clear your terminal screen at anytime.
Next we cd ~ where ~ is pronounced “tilda”¯ and change to our home directory. Then we pwd, or “print working directory”¯ confirming filesystem location.
That's all for this version of “hello world”¯ and our “good morning tasks”¯. Let's type exit and logout of here!
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Hi,
I m beginner in shell programming, now I want to write a simple server that create a pipe and write "hello" on it. In an other hand, a client connect to this server, and retrieve this message.
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Discussion started by: boro82
4 Replies
LEARN ABOUT CENTOS
fcnsq
FCNSQ(8) Open-FCoE Tools FCNSQ(8)NAME
fcnsq - Fibre Channel Name Server Query Tool
SYNOPSIS
fcnsq host --gpn port_id [-q | --quiet]
fcnsq host --gnn port_id [-q | --quiet]
fcnsq host --gspn port_id [-q | --quiet]
fcnsq host --gsnn wwpn [-q | --quiet]
fcnsq ?
DESCRIPTION
The fcnsq command performs Fibre Channel Name Server queries for a user-specified FC Host. The supported name server query commands
include: Get Port Name (GPN), Get Node Name (GNN), Get Symbolic Node Name (GSNN), and Get Symbolic Port Name (GSPN) as described in FC-GS-3
for the Common Transport (CT) services.
fcnsq takes the host bsg name as the input for the target host. Host bsg name must be a valid bsg device, e.g., "host12" as derived from
/dev/bsg/fc_host12. For each name server query command, the argument is either a Port ID or a World Wide Port Name. Port IDs and World Wide
Names must be specified in hexadecimal. To disable verbose output, use the --quiet option.
OPTIONS
host --gpn port_id
Get Port Name by Port ID for host.
host --gnn port_id
Get Node Name by Port ID for host.
host --gspn port_id
Get Symbolic Port Name by Port ID for host.
host --gsnn wwpn
Get Symbolic Node Name by World Wide Port Name for host.
-q, --quiet
Disable verbose output.
?
Display a help message with basic usage instructions.
EXAMPLES
Query Get Port Name (GPN) from host12 for Port ID 0xbf0027
fcnsq host12 --gpn bf0027
Query Get Node Name (GNN) from host12 for Port ID 0xbf0027
fcnsq host12 --gnn bf0027
Query Get Symbolic Port Name (GSPN) from host12 for Port ID 0xbf0027
fcnsq host12 --gspn bf0027
Query Get Symbolic Node Name (GSNN) from host12 for WWWPN 0x1000001B213C9DDA
fcnsq host12 --gsnn 0x1000001B213C9DDA
SEE ALSO fcoeadm(8)SUPPORT
fcnsq is part of the fcoe-utils package, maintained through the Open-FCoE project. Resources for both developers and users can be found at
the Open-FCoE website http://open-fcoe.org/.
Open-FCoE 06/09/2010 FCNSQ(8)
06-21-2019
