grep for multiple elements of an array
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I am trying to write a dd migration script that will do the following:
- read user input (max=4) into an array, called "array". the user will enter the logical volume names to be migrated.
- once each element is stored on an array, run:
/sbin/lvscan | grep -E '"array[0]"|"array[1]"|"array[2]"|"array[3]"’
- spawn multiple ssh connections to migrate each logical volume via dd to a specific host, the IP of which is also entered by user and stored in a variable.
I currently have:
#!/bin/bash
echo "Enter upto 4 SRVID's seperated by a space"
while read SRVIDS
do
[ "$SRVIDS" == "done" ] && break
array=("$array[@]" $SRVIDS)
done
/sbin/lvscan | grep -E '"array[0]"|"array[1]"|"array[2]"|"array[3]"' 2&>1
What am I doing wrong? I am unable to get grep for the logical volume paths.
shell-script dd array
edited Dec 4 at 3:02
Peschke
2,400924
asked Dec 4 at 2:07
Ertugrul Dur
63
add a comment |
up vote
0
down vote
favorite
I am trying to write a dd migration script that will do the following:
- read user input (max=4) into an array, called "array". the user will enter the logical volume names to be migrated.
- once each element is stored on an array, run:
/sbin/lvscan | grep -E '"array[0]"|"array[1]"|"array[2]"|"array[3]"’
- spawn multiple ssh connections to migrate each logical volume via dd to a specific host, the IP of which is also entered by user and stored in a variable.
I currently have:
#!/bin/bash
echo "Enter upto 4 SRVID's seperated by a space"
while read SRVIDS
do
[ "$SRVIDS" == "done" ] && break
array=("$array[@]" $SRVIDS)
done
/sbin/lvscan | grep -E '"array[0]"|"array[1]"|"array[2]"|"array[3]"' 2&>1
What am I doing wrong? I am unable to get grep for the logical volume paths.
shell-script dd array
edited Dec 4 at 3:02
Peschke
2,400924
asked Dec 4 at 2:07
Ertugrul Dur
63
1
Variables/arays names are not expanded under single quotes, you need to remove them. Also add$in front of their names.
– jimmij
Dec 4 at 5:14
Getting the volume names on the command line would make the script more flexible.
– Kusalananda
Dec 4 at 11:39
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I am trying to write a dd migration script that will do the following:
- read user input (max=4) into an array, called "array". the user will enter the logical volume names to be migrated.
- once each element is stored on an array, run:
/sbin/lvscan | grep -E '"array[0]"|"array[1]"|"array[2]"|"array[3]"’
- spawn multiple ssh connections to migrate each logical volume via dd to a specific host, the IP of which is also entered by user and stored in a variable.
I currently have:
#!/bin/bash
echo "Enter upto 4 SRVID's seperated by a space"
while read SRVIDS
do
[ "$SRVIDS" == "done" ] && break
array=("$array[@]" $SRVIDS)
done
/sbin/lvscan | grep -E '"array[0]"|"array[1]"|"array[2]"|"array[3]"' 2&>1
What am I doing wrong? I am unable to get grep for the logical volume paths.
shell-script dd array
edited Dec 4 at 3:02
Peschke
2,400924
asked Dec 4 at 2:07
Ertugrul Dur
63
I am trying to write a dd migration script that will do the following:
- read user input (max=4) into an array, called "array". the user will enter the logical volume names to be migrated.
- once each element is stored on an array, run:
/sbin/lvscan | grep -E '"array[0]"|"array[1]"|"array[2]"|"array[3]"’
- spawn multiple ssh connections to migrate each logical volume via dd to a specific host, the IP of which is also entered by user and stored in a variable.
I currently have:
#!/bin/bash
echo "Enter upto 4 SRVID's seperated by a space"
while read SRVIDS
do
[ "$SRVIDS" == "done" ] && break
array=("$array[@]" $SRVIDS)
done
/sbin/lvscan | grep -E '"array[0]"|"array[1]"|"array[2]"|"array[3]"' 2&>1
What am I doing wrong? I am unable to get grep for the logical volume paths.
shell-script dd array
shell-script dd array
edited Dec 4 at 3:02
Peschke
2,400924
asked Dec 4 at 2:07
Ertugrul Dur
63
edited Dec 4 at 3:02
Peschke
2,400924
asked Dec 4 at 2:07
Ertugrul Dur
63
edited Dec 4 at 3:02
Peschke
2,400924
edited Dec 4 at 3:02
Peschke
2,400924
edited Dec 4 at 3:02
Peschke
2,400924
2,400924
asked Dec 4 at 2:07
Ertugrul Dur
63
asked Dec 4 at 2:07
Ertugrul Dur
63
asked Dec 4 at 2:07
Ertugrul Dur
63
63
1
Variables/arays names are not expanded under single quotes, you need to remove them. Also add$in front of their names.
– jimmij
Dec 4 at 5:14
Getting the volume names on the command line would make the script more flexible.
– Kusalananda
Dec 4 at 11:39
add a comment |
1
Variables/arays names are not expanded under single quotes, you need to remove them. Also add$in front of their names.
– jimmij
Dec 4 at 5:14
Getting the volume names on the command line would make the script more flexible.
– Kusalananda
Dec 4 at 11:39
1
1
Variables/arays names are not expanded under single quotes, you need to remove them. Also add
$ in front of their names.– jimmij
Dec 4 at 5:14
Variables/arays names are not expanded under single quotes, you need to remove them. Also add
$ in front of their names.– jimmij
Dec 4 at 5:14
Getting the volume names on the command line would make the script more flexible.
– Kusalananda
Dec 4 at 11:39
Getting the volume names on the command line would make the script more flexible.
– Kusalananda
Dec 4 at 11:39
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
No need to list ALL the array elements; try:
IFS="|"
grep -E "$array[*]"
Don't forget to save old IFS and then restore it...
answered Dec 4 at 11:35
RudiC
3,8381312
... or do it in a subshell.
– Kusalananda
Dec 4 at 12:33
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
No need to list ALL the array elements; try:
IFS="|"
grep -E "$array[*]"
Don't forget to save old IFS and then restore it...
answered Dec 4 at 11:35
RudiC
3,8381312
... or do it in a subshell.
– Kusalananda
Dec 4 at 12:33
add a comment |
up vote
1
down vote
No need to list ALL the array elements; try:
IFS="|"
grep -E "$array[*]"
Don't forget to save old IFS and then restore it...
answered Dec 4 at 11:35
RudiC
3,8381312
... or do it in a subshell.
– Kusalananda
Dec 4 at 12:33
add a comment |
up vote
1
down vote
up vote
1
down vote
No need to list ALL the array elements; try:
IFS="|"
grep -E "$array[*]"
Don't forget to save old IFS and then restore it...
answered Dec 4 at 11:35
RudiC
3,8381312
No need to list ALL the array elements; try:
IFS="|"
grep -E "$array[*]"
Don't forget to save old IFS and then restore it...
answered Dec 4 at 11:35
RudiC
3,8381312
answered Dec 4 at 11:35
RudiC
3,8381312
answered Dec 4 at 11:35
RudiC
3,8381312
answered Dec 4 at 11:35
RudiC
3,8381312
3,8381312
... or do it in a subshell.
– Kusalananda
Dec 4 at 12:33
add a comment |
... or do it in a subshell.
– Kusalananda
Dec 4 at 12:33
... or do it in a subshell.
– Kusalananda
Dec 4 at 12:33
... or do it in a subshell.
– Kusalananda
Dec 4 at 12:33
add a comment |
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1
Variables/arays names are not expanded under single quotes, you need to remove them. Also add
$in front of their names.– jimmij
Dec 4 at 5:14
Getting the volume names on the command line would make the script more flexible.
– Kusalananda
Dec 4 at 11:39