03-15-2008
remove leading spaces from a line
Hi friends
I need some help,
I have a file which looks as follows
TEMP 014637065 014637065 517502 517502 RTE
517502 517502 RTE
AWATER_TEST 12325 23563 588323 2323 5656 32385 23235635
ANOTHER_TEST 12 5433 FTHH 5653 833
TEST 123 123 3235 5353 353 53 35 353 535 3
YTERS GJK JKLS
when ever there is a leading space on line(here there is a space at the starting of line 2 and 6 which may not be visible in thread), I need to remove that and append to the previous line. This means I want an output file which looks like
TEMP 014637065 014637065 517502 517502 RTE 517502 517502 RTE
AWATER_TEST 12325 23563 588323 2323 5656 32385 23235635
ANOTHER_TEST 12 5433 FTHH 5653 833
TEST 123 123 3235 5353 353 53 35 353 535 3 YTERS GJK JKLS
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LEARN ABOUT DEBIAN
lldptool-evb
lldptool(8) Linux lldptool(8)
NAME
evb - Show / manipulate EVB TLV configuration
SYNOPSIS
lldptool -t -i ethx -V evbCfg -c enableTx
lldptool -T -i ethx -V evbCfg -c enableTx=[yes|no]
lldptool -t -i ethx -V evbCfg -c fmode
lldptool -T -i ethx -V evbCfg -c fmode=[bridge|reflectiverelay]
lldptool -t -i ethx -V evbCfg -c capabilities
lldptool -T -i ethx -V evbCfg -c capabilities=[rte|ecp|vdp|none]
lldptool -t -i ethx -V evbCfg -c rte
lldptool -T -i ethx -V evbCfg -c rte=[<rte>]
lldptool -t -i ethx -V evbCfg -c vsis
lldptool -T -i ethx -V evbCfg -c vsis=[<number of vsis>]
DESCRIPTION
The EVB TLV is a TLV to announce the station and bridge's edge virtual bridging (evb) capabilities and request the bridge forwarding mode.
If both sides have agree on edge control protocol (ECP), VSI discovery protocol (VDP) capabilities, both sides can exchange VDP TLV using
ECP frames. The vsis parameter will set the maximum number of VSIs and show the number of currently configured VSIs.
ARGUMENTS
enableTx
Enables the EVB TLV to be transmitted
fmode shows or sets the forwarding mode between bridge (default) or reflectiverelay (RR).
capabilities
shows or sets the local capabilities that are announced to the adjacent switch in the TLV. This parameter will accept any combina-
tion of rte, vdp or ecp, separated by ",". Use the keyword "none" if you do not want to set any capabilities.
rte shows or set the local run time exponent (RTE). The RTE will be used as the base for the timing of the ECP and VDP protocols.
vsis shows or sets the number of virtual station interfaces (VSIs) that are announced to the adjacent switch in the TLV. This parameter
expects a number between 0 and 65535.
Theory of Operation
The EVB TLV is used to announce and exchange supported parameters between the station and an adjacent switch.
If "reflectiverelay" is set as forwarding mode, the switch will allow "reflection" of frames coming from different sources at the same port
back to the port. This will allow communication between virtual machines on the same host via the switch.
The capabilities parameter is used to set RTE, ECP and VDP support. VDP TLVs in ECP frames can only be exchanged if both sides agree on ECP
and VDP as capabilities. RTE will be used as the base timing parameter for ECP and VDP.
EXAMPLE & USAGE
Display locally configured values for eth8
lldptool -t -i eth8 -V evbCfg
Display remotely configured values for eth8
lldptool -n -t -i eth8 -V evbCfg
Display wether evb tlv is configured for tx on eth8
lldptool -t -i eth8 -V evbCfg -c enableTx
Display the currently requested forwarding mode for eth8
lldptool -t -i eth8 -V evbCfg -c fmode
Set the forwarding mode to reflective relay
lldptool -T -i eth8 -V evbCfg -c fmode=reflectiverelay
Display the currently configured capabilities
lldptool -t -i ethx -V evbCfg -c capabilities
Set the locally possible capabilities to RTE, ECP and VDP
lldptool -T -i ethx -V evbCfg -c capabilities=rte,ecp,vdp
Resets the locally possible capabilities to "none"
lldptool -T -i ethx -V evbCfg -c capabilities=none
Display the locally configured value for RTE
lldptool -t -i ethx -V evbCfg -c rte
Set the value for RTE
lldptool -T -i ethx -V evbCfg -c rte=[<rte>]
Display the configured maximum number of VSIs
lldptool -t -i ethx -V evbCfg -c vsis
Set the maximum number of VSIs
lldptool -T -i ethx -V evbCfg -c vsis=[<number of vsis>]
SOURCE
o IEEE 802.1Qbg (http://www.ieee802.org/1/pages/802.1bg.html)
NOTES
Currently the code in lldpad reflects draft 0 of the upcoming standard. EVB TLVs on the wire can be decoded with wireshark > v1.6.
SEE ALSO
lldptool-vdp(8), lldptool(8), lldpad(8)
AUTHOR
Jens Osterkamp
open-lldp February 2010 lldptool(8)