Linux bash -c in command shell script

Question

I am using ssh in a shell script in order to go on multiple linux server and get disk information on a particular disk. I am running following but I am not able to figure out the quote sequencing...In this example I am just capturing the header for my report....

ssh dbadmin@myserver bash -c '"df -kh | grep File | awk '{ print \$1 "  |  " \$2 "  |  " \$3 "  |  " \$4 "  |  " \$5 }' | tail -n -1"'

and following error...

bash: -c: line 0: syntax error near unexpected token |' bash: -c: line 0:df -kh | grep File | awk { print | | | | } | tail -n -1'

Any help or suggestions would be great...

Thanks

Why are you single and double quoting the entire command? Why are you using bash -c here at all? — Etan Reisner
– Etan Reisner, Commented Jun 17, 2015 at 17:21
See How to correctly write command inside commands with ssh which also uses the bash -c '...' idiom. — Jonathan Leffler
– Jonathan Leffler, Commented Jun 17, 2015 at 17:23

anubhava · Accepted Answer · 2015-06-17 17:21:01Z

2

Better to use quoted here-doc and avoid escaping:

ssh -t -t dbadmin@myserver<<'EOF'
df -kh | awk -v OFS="  |  " '/file/{ print $1, $2, $3, $4, $5 }' | tail -n -1
EOF

answered Jun 17, 2015 at 17:21

anubhava

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anubhava Over a year ago

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