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5 – Detailed Descriptions of Command LineTools
File Management Tools
5-24 D000006-000 Rev A
Q
5.3.4
Simplified Editing of Node-Specific Files
(Linux) : The combination of
uploadall
and
downloadall
provide a powerful
yet simple to use mechanism for reviewing and/or editing node-specific files
without the need to login to each node.
This is best explained with an example.
Assume the file
/etc./sysconfig/network-scripts/ifcfg-ib1
needs
to be reviewed and possibly edited for each host. This file would typically contain
the IP configuration information for IPoIB and may contain a unique IP address
per host.
To upload the file from all the hosts:
uploadall /etc/sysconfig/network-scripts/ifcfg-ib1 ifcfg-ib1
Now edit the uploaded files with an editor, such as
vi
:
vi uploads/*/ifcfg-ib1
If via the editor the file was changed for some or all of the hosts, it can then be
downloaded to all the hosts:
downloadall -d uploads ifcfg-ib1 /etc/sysconfig/network-scripts/ifcfg-ib1
Alternatively, if there was no need to download the file to all hosts, a subset of
hosts can be specified using the
-h
option or by creating an alternate host list file:
downloadall -d uploads -h 'host1 host32' ifcfg-ib1 /etc/sysconfig/network-scripts/ifcfg-ib1
NOTE: When downloading to a subset of hosts, make sure that only the hosts
uploaded from are specified.
5.3.5
Simplified Setup of Node-Generic Files
(Linux) : In contrast
scpall
can provide a powerful yet simple to use mechanism
for transferring files to all nodes that are generic (i.e., not node-specific).
For example, if all nodes in the cluster will use the same DNS server and TCP/IP
name resolution, they may be quickly set as follows:
Create an appropriate local file with the desired information. For example:
vi resolv.conf
Now copy the file to all hosts:
scpall resolv.conf /etc/resolv.conf