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Special Forums IP Networking Help with to check the tcp network connectivity between servers and hosts Post 302904091 by Don Cragun on Monday 2nd of June 2014 05:37:43 AM
Old 06-02-2014
Quote:
Originally Posted by sknovice
Hello,

My below code still not working, if the connection is rejected , the output is not appending to the output file.

code:
Code:
#!/bin/bash
#read the file line by line

cd "$1"
cat testping.txt | while read line
do
        # check if there are no blank lines
        if [ ! -z $line ]; then
                hosts=${line//:/ }
                nc -z $hosts >> testoutput.txt 2>&1
        fi
done


if there is any hosts with connection rejected, the entry is not available in the oyutput file.

please help.
Try changing:
Code:
        if [ ! -z $line ]; then
                hosts=${line//:/ }
                nc -z $hosts >> testoutput.txt 2>&1

to:
Code:
        if [ ! -z "$line" ]; then
                hosts=${line//:/ }
                nc -z $hosts 2>&1 >> testoutput.txt

 

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GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

NAME
grub-render-label - generate a .disk_label for Apple Macs. SYNOPSIS
grub-render-label [OPTION...] [OPTIONS] DESCRIPTION
Render Apple .disk_label. -b, --bgcolor=COLOR use COLOR for background -c, --color=COLOR use COLOR for text -f, --font=FILE use FILE as font (PF2). -i, --input=FILE read text from FILE. -o, --output=FILE set output filename. Default is STDOUT -t, --text=STRING set the label to render -v, --verbose print verbose messages. -?, --help give this help list --usage give a short usage message -V, --version print program version Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options. REPORTING BUGS
Report bugs to <bug-grub@gnu.org>. SEE ALSO
The full documentation for grub-render-label is maintained as a Texinfo manual. If the info and grub-render-label programs are properly installed at your site, the command info grub-render-label should give you access to the complete manual. grub-render-label (GRUB) 2.02-2ubuntu8.3 July 2018 GRUB-RENDER-LABEL(1)
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