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Top Forums Shell Programming and Scripting Can't find the mistake in sed expression Post 302288026 by pludi on Monday 16th of February 2009 09:18:04 AM
Old 02-16-2009
Code:
sed '/^iface eth0 inet / s/^\(iface eth0 inet\).*/\1 static/' /etc/network/interfaces

A back reference is always only valid within the substitution and can't be kept across commands.
 

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aoe-interfaces(8)					      System Manager's Manual						 aoe-interfaces(8)

NAME
aoe-interfaces - restrict aoe driver to specified network interfaces SYNOPSIS
aoe-interfaces [dev1] [dev2 ...] aoe-interfaces -c DESCRIPTION
The aoe-interfaces command tells the aoe driver to ignore ATA over Ethernet (AoE) traffic on all but the specified network interfaces. It is analogous to the aoe_iflist module load option. If neither the aoe_iflist module load option nor the aoe-interfaces command are used, the aoe driver will use any network interface for AoE traffic. Using aoe-interfaces to limit AoE to only trusted networks prevents the case where a rogue AoE target appears on a public net- work, diverting data from the legitimate AoE target. Such an imposter target effectively corrupts the data on the legitimate target. If the aoe driver is a module, then calling aoe-interfaces without arguments will display the current interfaces list. If it hasn't been set then the output will be blank. It's good to run the aoe-discover command after setting the AoE interfaces list. OPTIONS
-c The -c flag will clear the interface access list, permitting any interface to be used. EXAMPLE
In this example, the root user on a host named nai loads the aoe module with only eth0 allowable for AoE traffic. After remembering that shelf 7 is on eth3, this sysadmin uses aoe-interfaces to add eth3 to the list of allowable network interfaces and then calls aoe-discover to ask the aoe driver to look for new AoE devices. nai:~# modprobe aoe aoe_iflist="eth0" nai:~# aoe-stat e10.9 eth0 up nai:~# aoe-interfaces eth0 eth3 nai:~# aoe-discover nai:~# aoe-stat e7.0 eth3 up e7.1 eth3 up e7.2 eth3 up e7.3 eth3 up e7.4 eth3 up e7.5 eth3 up e7.6 eth3 up e7.7 eth3 up e7.8 eth3 up e7.9 eth3 up e10.9 eth0 up nai:~# aoe-interfaces eth0 eth3 SEE ALSO
aoe-discover(8), aoe-stat(8), aoetools(8). AUTHOR
Ed L. Cashin (ecashin@coraid.com) aoe-interfaces(8)
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