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clubak - format output from clush/pdsh-like output and more


clubak [ OPTIONS ]


clubak formats text from standard input containing lines of the form "node:output". It is
fully backward compatible with dshbak(1) but provides additonal features. For instance,
clubak always displays its results sorted by node/nodeset.

You do not need to use clubak when using clush(1) as all output formatting features are
already included in. It is provided for other usages, like post-processing results of the
form "node:output".

Like clush(1), clubak uses the ClusterShell.MsgTree module of the ClusterShell library
(see pydoc ClusterShell.MsgTree).


clubak should be started with connected standard input.


show clubak version number and exit

-b, -c gather nodes with same output (-c is provided for dshbak(1) compatibility)

-d, --debug
output more messages for debugging purpose

-L disable header block and order output by nodes

-r, --regroup
fold nodeset using node groups

optional groups.conf(5) group source to use

-G, --groupbase
do not display group source prefix (always @groupname)

node / line content separator string (default: :)

-F, --fast
faster but memory hungry mode (preload all messages per node)

-T, --tree
message tree trace mode; switch to enable ClusterShell.MsgTree trace mode, all
keys/nodes being kept for each message element of the tree, thus allowing special
output gathering

whether to use ANSI colors to surround node or nodeset prefix/header with escape
sequences to display them in color on the terminal. WHENCOLOR is never, always or
auto (which use color if standard output refers to a terminal). Color is set to
[34m (blue foreground text) and cannot be modified.

--diff show diff between gathered outputs


An exit status of zero indicates success of the clubak command.


1. clubak can be used to gather some recorded clush(1) results:

Record clush(1) results in a file:
# clush -w node[1-7] uname -r >/tmp/clush_output
# clush -w node[32-159] uname -r >>/tmp/clush_output

Display file gathered results (in line-mode):
# clubak -bL </tmp/clush_output

2. Another example, iterate over node* text files in current directory and gather
characters count for all of them:
# find -name "node*" -exec wc -c {} ; | awk '{ gsub("./","",$2); print $2": "$1 }' | clubak -bL
node[1,3]: 7
node2: 9

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