Category: Linux

How to check if Linux has Fibre card installed or not?

 
How to check if Linux box has f Fibre card installed or not…. Below are few methods that, you can tell end user if underline Linux server has Fibre card installed.

# lspci | grep -i emulex
0b:00.0 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter (rev 02)

<<<< For more details like the speed card is operating etc >>>>

# lspci -vv | less
Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter (rev 02)
Subsystem: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B-

Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0, Cache Line Size 10
Interrupt: pin A routed to IRQ 217
Region 0: Memory at f9ff0000 (64-bit, non-prefetchable) [size=4K]
Region 2: Memory at f9fe0000 (64-bit, non-prefetchable) [size=256]
Region 4: I/O ports at 4000 [size=256]
Capabilities: [58] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [60] Message Signalled Interrupts: 64bit+ Queue=0/4 Enable-
Address: 0000000000000000 Data: 0000
Capabilities: [44] Express Endpoint IRQ 0
Device: Supported: MaxPayload 2048 bytes, PhantFunc 0, ExtTag+
Device: Latency L0s <4us, L1 <16us
Device: AtnBtn- AtnInd- PwrInd-
Device: Errors: Correctable- Non-Fatal+ Fatal+ Unsupported-
Device: RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
Device: MaxPayload 512 bytes, MaxReadReq 4096 bytes
Link: Supported Speed 2.5Gb/s, Width x4, ASPM L0s, Port 0
Link: Latency L0s <4us, L1 unlimited
Link: ASPM Disabled RCB 64 bytes CommClk- ExtSynch-
Link: Speed 2.5Gb/s, Width x4
Capabilities: [100] Advanced Error Reporting
Capabilities: [12c] Power Budgeting

<<<< You can check if required driver is installed or not >>>>

# dmesg | grep -i emulex
Emulex LightPulse Fibre Channel SCSI driver 8.0.16.34
Copyright(c) 2003-2007 Emulex. All rights reserved.

Another way to check this out is check for /proc/scsi

Fibre channel is visible in the /proc/scsi hierarchy, but the exact path depends on the manufacturer (Emulex, Qlogic) of the Fibre Channel adapter + device driver. in my case it is as below –

# ls -l /proc/scsi/lpfc/0
-rw-r–r– 1 root root 0 Sep 10 03:36 /proc/scsi/lpfc/0

Yet another option is to check if kernel module is installed or not

# lsmod | grep -i lpfc
lpfc 170561 0
scsi_transport_fc 12353 1 lpfc
scsi_mod 120269 5 scsi_dump,lpfc,scsi_transport_fc,cciss,sd_mod

 
Reference:

puppet – configuration management tool

Puppet is a tool designed to manage the configuration of Unix-like and Microsoft Windows systems declaratively. The user describes system resources and their state, either using Puppet’s declarative language or a Ruby DSL (domain-specific language). This information is stored in files called “Puppet manifests”. Puppet discovers the system information via a utility called Facter, and compiles the Puppet manifests into a system-specific catalog containing resources and resource dependency, which are applied against the target systems. Any actions taken by Puppet are then reported. more

Video which gives demo on puppet

excellent tcpdump command to find network details for interface and their VLAN details

tcpdump -nn -v -i eth2 -s 1500 -c 1 ‘ether[20:2]==0x2000’ 2>/dev/null|egrep “port-ID|Address|Devices-ID|VLAN”

This command will be very useful when you trouble shoot network interface, especially when you requested new network patching for a particular vlan network

Linux Distro “Tails” (Safe browsing using live cd/pen drive)

Image

If you want to browse safely without any fear of security, then try this Linux Distro “Trails”

This will be handy to browse for financial activities like accessing bank accounts, credit card transactions. I still not tried this, will give my comments once I try this.

https://tails.boum.org/

I came to know about this Linux distro when I am reading corporate spy news, where they suggested to use live cd/pen drive of “Trails” when you are on business trip.