Grep for a variable in a file
0
I want to grep the following patterns in the file /root/scripts/list.txt:
'^"123"^'
'^"456"^'
'^"789"^'
So I write code like below in my shell script
myvar=-F -e '^"123"^' -e '^"456"^' -e '^"789"^'
grep $myvar /root/scripts/list.txt
(Pattern will change every time, so I created a string with myvar)
It is giving a null output, but when I run the command below I'm getting the required output:
grep -F -e '^"123"^' -e '^"456"^' -e '^"789"^' /root/scripts/list.txt
Can some one please help me?
Thanks in advance.
shell
edited Nov 15 '18 at 16:07
pushkin
4,073112753
asked Nov 15 '18 at 15:34
Dhanamunichandra BhushamDhanamunichandra Bhusham
1
add a comment |
0
I want to grep the following patterns in the file /root/scripts/list.txt:
'^"123"^'
'^"456"^'
'^"789"^'
So I write code like below in my shell script
myvar=-F -e '^"123"^' -e '^"456"^' -e '^"789"^'
grep $myvar /root/scripts/list.txt
(Pattern will change every time, so I created a string with myvar)
It is giving a null output, but when I run the command below I'm getting the required output:
grep -F -e '^"123"^' -e '^"456"^' -e '^"789"^' /root/scripts/list.txt
Can some one please help me?
Thanks in advance.
shell
edited Nov 15 '18 at 16:07
pushkin
4,073112753
asked Nov 15 '18 at 15:34
Dhanamunichandra BhushamDhanamunichandra Bhusham
1
The problem is your use of quotes, but you haven't accurately shown how you're setting myvar. (I assume you're not writingmyvar=-f -e '^..., since that would try to run a command named-eand you would probably get an error of the form `-e: command not found.). Edit your question to show your code.
– William Pursell
Nov 15 '18 at 15:51
I suspect you just need to omit the single quotes around each term in the assignment of myvar, but it's difficult to say without more detail.
– William Pursell
Nov 15 '18 at 15:52
Trymyvar='-F -e ^"123"^ -e ^"456"^'
– William Pursell
Nov 15 '18 at 15:57
If you are using bash, consider using bash arrays:myvar=( -F -e '^"123"^' )andgrep ${myvar[@]}
– Samuel Kirschner
Nov 15 '18 at 15:58
Thanks William Pursell for your suggestion to omit single quotes around the id. I wonder how this is working in shell script and not working when I run that grep command in command prompt. Please explain.
– Dhanamunichandra Bhusham
Nov 18 '18 at 16:01
add a comment |
0
0
0
I want to grep the following patterns in the file /root/scripts/list.txt:
'^"123"^'
'^"456"^'
'^"789"^'
So I write code like below in my shell script
myvar=-F -e '^"123"^' -e '^"456"^' -e '^"789"^'
grep $myvar /root/scripts/list.txt
(Pattern will change every time, so I created a string with myvar)
It is giving a null output, but when I run the command below I'm getting the required output:
grep -F -e '^"123"^' -e '^"456"^' -e '^"789"^' /root/scripts/list.txt
Can some one please help me?
Thanks in advance.
shell
edited Nov 15 '18 at 16:07
pushkin
4,073112753
asked Nov 15 '18 at 15:34
Dhanamunichandra BhushamDhanamunichandra Bhusham
1
I want to grep the following patterns in the file /root/scripts/list.txt:
'^"123"^'
'^"456"^'
'^"789"^'
So I write code like below in my shell script
myvar=-F -e '^"123"^' -e '^"456"^' -e '^"789"^'
grep $myvar /root/scripts/list.txt
(Pattern will change every time, so I created a string with myvar)
It is giving a null output, but when I run the command below I'm getting the required output:
grep -F -e '^"123"^' -e '^"456"^' -e '^"789"^' /root/scripts/list.txt
Can some one please help me?
Thanks in advance.
shell
shell
edited Nov 15 '18 at 16:07
pushkin
4,073112753
asked Nov 15 '18 at 15:34
Dhanamunichandra BhushamDhanamunichandra Bhusham
1
edited Nov 15 '18 at 16:07
pushkin
4,073112753
asked Nov 15 '18 at 15:34
Dhanamunichandra BhushamDhanamunichandra Bhusham
1
edited Nov 15 '18 at 16:07
pushkin
4,073112753
edited Nov 15 '18 at 16:07
pushkin
4,073112753
edited Nov 15 '18 at 16:07
pushkin
4,073112753
4,073112753
asked Nov 15 '18 at 15:34
Dhanamunichandra BhushamDhanamunichandra Bhusham
1
asked Nov 15 '18 at 15:34
Dhanamunichandra BhushamDhanamunichandra Bhusham
1
asked Nov 15 '18 at 15:34
Dhanamunichandra BhushamDhanamunichandra Bhusham
1
1
The problem is your use of quotes, but you haven't accurately shown how you're setting myvar. (I assume you're not writingmyvar=-f -e '^..., since that would try to run a command named-eand you would probably get an error of the form `-e: command not found.). Edit your question to show your code.
– William Pursell
Nov 15 '18 at 15:51
I suspect you just need to omit the single quotes around each term in the assignment of myvar, but it's difficult to say without more detail.
– William Pursell
Nov 15 '18 at 15:52
Trymyvar='-F -e ^"123"^ -e ^"456"^'
– William Pursell
Nov 15 '18 at 15:57
If you are using bash, consider using bash arrays:myvar=( -F -e '^"123"^' )andgrep ${myvar[@]}
– Samuel Kirschner
Nov 15 '18 at 15:58
Thanks William Pursell for your suggestion to omit single quotes around the id. I wonder how this is working in shell script and not working when I run that grep command in command prompt. Please explain.
– Dhanamunichandra Bhusham
Nov 18 '18 at 16:01
add a comment |
The problem is your use of quotes, but you haven't accurately shown how you're setting myvar. (I assume you're not writingmyvar=-f -e '^..., since that would try to run a command named-eand you would probably get an error of the form `-e: command not found.). Edit your question to show your code.
– William Pursell
Nov 15 '18 at 15:51
I suspect you just need to omit the single quotes around each term in the assignment of myvar, but it's difficult to say without more detail.
– William Pursell
Nov 15 '18 at 15:52
Trymyvar='-F -e ^"123"^ -e ^"456"^'
– William Pursell
Nov 15 '18 at 15:57
If you are using bash, consider using bash arrays:myvar=( -F -e '^"123"^' )andgrep ${myvar[@]}
– Samuel Kirschner
Nov 15 '18 at 15:58
Thanks William Pursell for your suggestion to omit single quotes around the id. I wonder how this is working in shell script and not working when I run that grep command in command prompt. Please explain.
– Dhanamunichandra Bhusham
Nov 18 '18 at 16:01
The problem is your use of quotes, but you haven't accurately shown how you're setting myvar. (I assume you're not writing
myvar=-f -e '^..., since that would try to run a command named -e and you would probably get an error of the form `-e: command not found.). Edit your question to show your code.– William Pursell
Nov 15 '18 at 15:51
The problem is your use of quotes, but you haven't accurately shown how you're setting myvar. (I assume you're not writing
myvar=-f -e '^..., since that would try to run a command named -e and you would probably get an error of the form `-e: command not found.). Edit your question to show your code.– William Pursell
Nov 15 '18 at 15:51
I suspect you just need to omit the single quotes around each term in the assignment of myvar, but it's difficult to say without more detail.
– William Pursell
Nov 15 '18 at 15:52
I suspect you just need to omit the single quotes around each term in the assignment of myvar, but it's difficult to say without more detail.
– William Pursell
Nov 15 '18 at 15:52
Try
myvar='-F -e ^"123"^ -e ^"456"^'– William Pursell
Nov 15 '18 at 15:57
Try
myvar='-F -e ^"123"^ -e ^"456"^'– William Pursell
Nov 15 '18 at 15:57
If you are using bash, consider using bash arrays:
myvar=( -F -e '^"123"^' ) and grep ${myvar[@]}– Samuel Kirschner
Nov 15 '18 at 15:58
If you are using bash, consider using bash arrays:
myvar=( -F -e '^"123"^' ) and grep ${myvar[@]}– Samuel Kirschner
Nov 15 '18 at 15:58
Thanks William Pursell for your suggestion to omit single quotes around the id. I wonder how this is working in shell script and not working when I run that grep command in command prompt. Please explain.
– Dhanamunichandra Bhusham
Nov 18 '18 at 16:01
Thanks William Pursell for your suggestion to omit single quotes around the id. I wonder how this is working in shell script and not working when I run that grep command in command prompt. Please explain.
– Dhanamunichandra Bhusham
Nov 18 '18 at 16:01
add a comment |
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The problem is your use of quotes, but you haven't accurately shown how you're setting myvar. (I assume you're not writing
myvar=-f -e '^..., since that would try to run a command named-eand you would probably get an error of the form `-e: command not found.). Edit your question to show your code.– William Pursell
Nov 15 '18 at 15:51
I suspect you just need to omit the single quotes around each term in the assignment of myvar, but it's difficult to say without more detail.
– William Pursell
Nov 15 '18 at 15:52
Try
myvar='-F -e ^"123"^ -e ^"456"^'– William Pursell
Nov 15 '18 at 15:57
If you are using bash, consider using bash arrays:
myvar=( -F -e '^"123"^' )andgrep ${myvar[@]}– Samuel Kirschner
Nov 15 '18 at 15:58
Thanks William Pursell for your suggestion to omit single quotes around the id. I wonder how this is working in shell script and not working when I run that grep command in command prompt. Please explain.
– Dhanamunichandra Bhusham
Nov 18 '18 at 16:01