Bash - How to put an array inside values of variable?
I have a web.txt file which contains:
youtube
facebook
google
My sh file contains:
readarray web < web.txt
url = www.website.com
Commands I have used:
readarray web < web.txt
url = www."$web".com
ping url
Expected output:
ping youtube.com
ping facebook.com
ping google.com
What should be the right syntax? Thanks!
shell variable array
edited Nov 10 '18 at 1:10
steeldriver
35.1k35185
asked Nov 10 '18 at 0:52
BenBen
1
add a comment |
I have a web.txt file which contains:
youtube
facebook
google
My sh file contains:
readarray web < web.txt
url = www.website.com
Commands I have used:
readarray web < web.txt
url = www."$web".com
ping url
Expected output:
ping youtube.com
ping facebook.com
ping google.com
What should be the right syntax? Thanks!
shell variable array
edited Nov 10 '18 at 1:10
steeldriver
35.1k35185
asked Nov 10 '18 at 0:52
BenBen
1
mywiki.wooledge.org/BashFAQ/001
– jasonwryan
Nov 10 '18 at 0:58
your problem has nothing to do with arrays ..... the problem is withbash parameter substitution
– jsotola
Nov 10 '18 at 0:59
add a comment |
I have a web.txt file which contains:
youtube
facebook
google
My sh file contains:
readarray web < web.txt
url = www.website.com
Commands I have used:
readarray web < web.txt
url = www."$web".com
ping url
Expected output:
ping youtube.com
ping facebook.com
ping google.com
What should be the right syntax? Thanks!
shell variable array
edited Nov 10 '18 at 1:10
steeldriver
35.1k35185
asked Nov 10 '18 at 0:52
BenBen
1
I have a web.txt file which contains:
youtube
facebook
google
My sh file contains:
readarray web < web.txt
url = www.website.com
Commands I have used:
readarray web < web.txt
url = www."$web".com
ping url
Expected output:
ping youtube.com
ping facebook.com
ping google.com
What should be the right syntax? Thanks!
shell variable array
shell variable array
edited Nov 10 '18 at 1:10
steeldriver
35.1k35185
asked Nov 10 '18 at 0:52
BenBen
1
edited Nov 10 '18 at 1:10
steeldriver
35.1k35185
asked Nov 10 '18 at 0:52
BenBen
1
edited Nov 10 '18 at 1:10
steeldriver
35.1k35185
edited Nov 10 '18 at 1:10
steeldriver
35.1k35185
edited Nov 10 '18 at 1:10
steeldriver
35.1k35185
35.1k35185
asked Nov 10 '18 at 0:52
BenBen
1
asked Nov 10 '18 at 0:52
BenBen
1
asked Nov 10 '18 at 0:52
BenBen
1
1
mywiki.wooledge.org/BashFAQ/001
– jasonwryan
Nov 10 '18 at 0:58
your problem has nothing to do with arrays ..... the problem is withbash parameter substitution
– jsotola
Nov 10 '18 at 0:59
add a comment |
mywiki.wooledge.org/BashFAQ/001
– jasonwryan
Nov 10 '18 at 0:58
your problem has nothing to do with arrays ..... the problem is withbash parameter substitution
– jsotola
Nov 10 '18 at 0:59
mywiki.wooledge.org/BashFAQ/001
– jasonwryan
Nov 10 '18 at 0:58
mywiki.wooledge.org/BashFAQ/001
– jasonwryan
Nov 10 '18 at 0:58
your problem has nothing to do with arrays ..... the problem is with
bash parameter substitution– jsotola
Nov 10 '18 at 0:59
your problem has nothing to do with arrays ..... the problem is with
bash parameter substitution– jsotola
Nov 10 '18 at 0:59
add a comment |
2 Answers
2
active
oldest
votes
If you really want to print the expected output shown, then
$ readarray -t web < web.txt
$ printf 'ping www.%s.comn' "${web[@]}"
ping www.youtube.com
ping www.facebook.com
ping www.google.com
However if you want to actually ping the hosts, the probably xargs is simpler e.g.
xargs -a web.txt -I{} ping -c1 "www.{}.com"
answered Nov 10 '18 at 1:17
steeldriversteeldriver
35.1k35185
add a comment |
If you want to prepend www. and append .com to the strings read from the file web.txt and use ping on the resulting strings:
while IFS= read -r company; do
ping "www.$company.com"
done <web.txt
answered Jan 11 at 8:12
KusalanandaKusalananda
124k16234385
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you really want to print the expected output shown, then
$ readarray -t web < web.txt
$ printf 'ping www.%s.comn' "${web[@]}"
ping www.youtube.com
ping www.facebook.com
ping www.google.com
However if you want to actually ping the hosts, the probably xargs is simpler e.g.
xargs -a web.txt -I{} ping -c1 "www.{}.com"
answered Nov 10 '18 at 1:17
steeldriversteeldriver
35.1k35185
add a comment |
If you really want to print the expected output shown, then
$ readarray -t web < web.txt
$ printf 'ping www.%s.comn' "${web[@]}"
ping www.youtube.com
ping www.facebook.com
ping www.google.com
However if you want to actually ping the hosts, the probably xargs is simpler e.g.
xargs -a web.txt -I{} ping -c1 "www.{}.com"
answered Nov 10 '18 at 1:17
steeldriversteeldriver
35.1k35185
add a comment |
If you really want to print the expected output shown, then
$ readarray -t web < web.txt
$ printf 'ping www.%s.comn' "${web[@]}"
ping www.youtube.com
ping www.facebook.com
ping www.google.com
However if you want to actually ping the hosts, the probably xargs is simpler e.g.
xargs -a web.txt -I{} ping -c1 "www.{}.com"
answered Nov 10 '18 at 1:17
steeldriversteeldriver
35.1k35185
If you really want to print the expected output shown, then
$ readarray -t web < web.txt
$ printf 'ping www.%s.comn' "${web[@]}"
ping www.youtube.com
ping www.facebook.com
ping www.google.com
However if you want to actually ping the hosts, the probably xargs is simpler e.g.
xargs -a web.txt -I{} ping -c1 "www.{}.com"
answered Nov 10 '18 at 1:17
steeldriversteeldriver
35.1k35185
answered Nov 10 '18 at 1:17
steeldriversteeldriver
35.1k35185
answered Nov 10 '18 at 1:17
steeldriversteeldriver
35.1k35185
answered Nov 10 '18 at 1:17
steeldriversteeldriver
35.1k35185
35.1k35185
add a comment |
add a comment |
If you want to prepend www. and append .com to the strings read from the file web.txt and use ping on the resulting strings:
while IFS= read -r company; do
ping "www.$company.com"
done <web.txt
answered Jan 11 at 8:12
KusalanandaKusalananda
124k16234385
add a comment |
If you want to prepend www. and append .com to the strings read from the file web.txt and use ping on the resulting strings:
while IFS= read -r company; do
ping "www.$company.com"
done <web.txt
answered Jan 11 at 8:12
KusalanandaKusalananda
124k16234385
add a comment |
If you want to prepend www. and append .com to the strings read from the file web.txt and use ping on the resulting strings:
while IFS= read -r company; do
ping "www.$company.com"
done <web.txt
answered Jan 11 at 8:12
KusalanandaKusalananda
124k16234385
If you want to prepend www. and append .com to the strings read from the file web.txt and use ping on the resulting strings:
while IFS= read -r company; do
ping "www.$company.com"
done <web.txt
answered Jan 11 at 8:12
KusalanandaKusalananda
124k16234385
answered Jan 11 at 8:12
KusalanandaKusalananda
124k16234385
answered Jan 11 at 8:12
KusalanandaKusalananda
124k16234385
answered Jan 11 at 8:12
KusalanandaKusalananda
124k16234385
124k16234385
add a comment |
add a comment |
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mywiki.wooledge.org/BashFAQ/001
– jasonwryan
Nov 10 '18 at 0:58
your problem has nothing to do with arrays ..... the problem is with
bash parameter substitution– jsotola
Nov 10 '18 at 0:59