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Top Forums Shell Programming and Scripting script for df output from multiple hosts Post 302147543 by Lakris on Tuesday 27th of November 2007 12:02:40 PM
Old 11-27-2007
Ok then! Smilie
Just a few things...
I edited Your script for readability, removed what i think was redundant "debug"-stuff. See my comments:

Code:
#!/usr/bin/ksh -vx
while [ $# -gt 0 ]; do
    ssh root@$1 'hostname; df -k' >> /tmp/df.out
    if [ $? = 0 ]; then 
#If the above is successful, why do You want to do it again?
        ssh root@$1 ssh root@$1 'hostname; df -k' >> /tmp/df.out 
#Is this really correct? ssh to itself to run the commands?
#Unless You want to make sure it can ssh to itself?
        if [ $? = 0 ]; then 
#If it was correct the first time, why shouldn't it be the next time?
            ssh root@$1 
#Do You want to go interactive in a script?
            if [ $? = 0 ]; then
                ssh root@$1 hostname >> sshsuccess.list 
#I guess the presence of output in /tmp/df.out should give enough indication about a hosts accessibility
                shift
            fi
        else
            echo root@$1 >> sshfailed.list
            echo "check .ssh directory"
            ssh root@$1 
#If it is inaccessible, do You want to try to connect anyway?
        fi
    else
        echo "No SSH on root@$1" >> nossh.list
        shift
    fi
done

Just a few thought, since You "asked" for it.

/Lakris
 

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textutil::trim(n)				    Text and string utilities, macro processing 				 textutil::trim(n)

__________________________________________________________________________________________________________________________________________________

NAME
textutil::trim - Procedures to trim strings SYNOPSIS
package require Tcl 8.2 package require textutil::trim ?0.7? ::textutil::trim::trim string ?regexp? ::textutil::trim::trimleft string ?regexp? ::textutil::trim::trimright string ?regexp? ::textutil::trim::trimPrefix string prefix ::textutil::trim::trimEmptyHeading string _________________________________________________________________ DESCRIPTION
The package textutil::trim provides commands that trim strings using arbitrary regular expressions. The complete set of procedures is described below. ::textutil::trim::trim string ?regexp? Remove in string any leading and trailing substring according to the regular expression regexp and return the result as a new string. This is done for all lines in the string, that is any substring between 2 newline chars, or between the beginning of the string and a newline, or between a newline and the end of the string, or, if the string contain no newline, between the beginning and the end of the string. The regular expression regexp defaults to "[ \t]+". ::textutil::trim::trimleft string ?regexp? Remove in string any leading substring according to the regular expression regexp and return the result as a new string. This apply on any line in the string, that is any substring between 2 newline chars, or between the beginning of the string and a newline, or between a newline and the end of the string, or, if the string contain no newline, between the beginning and the end of the string. The regular expression regexp defaults to "[ \t]+". ::textutil::trim::trimright string ?regexp? Remove in string any trailing substring according to the regular expression regexp and return the result as a new string. This apply on any line in the string, that is any substring between 2 newline chars, or between the beginning of the string and a newline, or between a newline and the end of the string, or, if the string contain no newline, between the beginning and the end of the string. The regular expression regexp defaults to "[ \t]+". ::textutil::trim::trimPrefix string prefix Removes the prefix from the beginning of string and returns the result. The string is left unchanged if it doesn't have prefix at its beginning. ::textutil::trim::trimEmptyHeading string Looks for empty lines (including lines consisting of only whitespace) at the beginning of the string and removes it. The modified string is returned as the result of the command. BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category textutil of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for either package and/or documentation. SEE ALSO
regexp(n), split(n), string(n) KEYWORDS
prefix, regular expression, string, trimming textutil 0.7 textutil::trim(n)
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