How to create an environment variable that is the output of a command
How do I create an environment variable that is the result of a specific command?
Specifically, I want an environment variable ($BWD) that is the basename of $PWD
$ cd /home/devel/Autils/lib
$ echo $PWD
/home/devel/Autils/lib
$ # something here to assign BWD
$ echo $BWD
lib
environment-variables alias
edited 3 mins ago
Jeff Schaller
39k1053125
asked 11 mins ago
JoshJosh
61
New contributor
Josh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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How do I create an environment variable that is the result of a specific command?
Specifically, I want an environment variable ($BWD) that is the basename of $PWD
$ cd /home/devel/Autils/lib
$ echo $PWD
/home/devel/Autils/lib
$ # something here to assign BWD
$ echo $BWD
lib
environment-variables alias
edited 3 mins ago
Jeff Schaller
39k1053125
asked 11 mins ago
JoshJosh
61
New contributor
Josh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
How do I create an environment variable that is the result of a specific command?
Specifically, I want an environment variable ($BWD) that is the basename of $PWD
$ cd /home/devel/Autils/lib
$ echo $PWD
/home/devel/Autils/lib
$ # something here to assign BWD
$ echo $BWD
lib
environment-variables alias
edited 3 mins ago
Jeff Schaller
39k1053125
asked 11 mins ago
JoshJosh
61
New contributor
Josh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
How do I create an environment variable that is the result of a specific command?
Specifically, I want an environment variable ($BWD) that is the basename of $PWD
$ cd /home/devel/Autils/lib
$ echo $PWD
/home/devel/Autils/lib
$ # something here to assign BWD
$ echo $BWD
lib
environment-variables alias
environment-variables alias
edited 3 mins ago
Jeff Schaller
39k1053125
asked 11 mins ago
JoshJosh
61
New contributor
Josh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 3 mins ago
Jeff Schaller
39k1053125
asked 11 mins ago
JoshJosh
61
New contributor
Josh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 3 mins ago
Jeff Schaller
39k1053125
edited 3 mins ago
Jeff Schaller
39k1053125
edited 3 mins ago
Jeff Schaller
39k1053125
39k1053125
asked 11 mins ago
JoshJosh
61
New contributor
Josh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 11 mins ago
JoshJosh
61
asked 11 mins ago
JoshJosh
61
61
New contributor
Josh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Josh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Josh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
You can use the construct foo="$(command)" to return the output of command into the variable foo. So, for your use-case:
$ BWD="$(basename $PWD)"
answered 9 mins ago
DopeGhotiDopeGhoti
43.6k55382
OrBWD=${PWD##*/}
– jasonwryan
2 mins ago
add a comment |
Using command substitution:
export BWD="basename $(PWD)"
answered 2 mins ago
Nasir RileyNasir Riley
2,406239
add a comment |
In general the sequence foo="$(bar)" will run the command bar and assign the output to the variable.
e.g.
% echo $PWD
/home/sweh
% BWD="$(basename $PWD)"
% echo $BWD
sweh
This creates a shell variable. If you want to make it into an environment variable (which can be seen by sub-shells) you can export it.
e.g.
export BWD="$(basename $PWD)"
However, in this case don't need to run a command, but use shell variable expansion
BWD=${PWD##*/}
answered 1 min ago
Stephen HarrisStephen Harris
25.2k24477
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can use the construct foo="$(command)" to return the output of command into the variable foo. So, for your use-case:
$ BWD="$(basename $PWD)"
answered 9 mins ago
DopeGhotiDopeGhoti
43.6k55382
OrBWD=${PWD##*/}
– jasonwryan
2 mins ago
add a comment |
You can use the construct foo="$(command)" to return the output of command into the variable foo. So, for your use-case:
$ BWD="$(basename $PWD)"
answered 9 mins ago
DopeGhotiDopeGhoti
43.6k55382
OrBWD=${PWD##*/}
– jasonwryan
2 mins ago
add a comment |
You can use the construct foo="$(command)" to return the output of command into the variable foo. So, for your use-case:
$ BWD="$(basename $PWD)"
answered 9 mins ago
DopeGhotiDopeGhoti
43.6k55382
You can use the construct foo="$(command)" to return the output of command into the variable foo. So, for your use-case:
$ BWD="$(basename $PWD)"
answered 9 mins ago
DopeGhotiDopeGhoti
43.6k55382
answered 9 mins ago
DopeGhotiDopeGhoti
43.6k55382
answered 9 mins ago
DopeGhotiDopeGhoti
43.6k55382
answered 9 mins ago
DopeGhotiDopeGhoti
43.6k55382
43.6k55382
OrBWD=${PWD##*/}
– jasonwryan
2 mins ago
add a comment |
OrBWD=${PWD##*/}
– jasonwryan
2 mins ago
Or
BWD=${PWD##*/}– jasonwryan
2 mins ago
Or
BWD=${PWD##*/}– jasonwryan
2 mins ago
add a comment |
Using command substitution:
export BWD="basename $(PWD)"
answered 2 mins ago
Nasir RileyNasir Riley
2,406239
add a comment |
Using command substitution:
export BWD="basename $(PWD)"
answered 2 mins ago
Nasir RileyNasir Riley
2,406239
add a comment |
Using command substitution:
export BWD="basename $(PWD)"
answered 2 mins ago
Nasir RileyNasir Riley
2,406239
Using command substitution:
export BWD="basename $(PWD)"
answered 2 mins ago
Nasir RileyNasir Riley
2,406239
answered 2 mins ago
Nasir RileyNasir Riley
2,406239
answered 2 mins ago
Nasir RileyNasir Riley
2,406239
answered 2 mins ago
Nasir RileyNasir Riley
2,406239
2,406239
add a comment |
add a comment |
In general the sequence foo="$(bar)" will run the command bar and assign the output to the variable.
e.g.
% echo $PWD
/home/sweh
% BWD="$(basename $PWD)"
% echo $BWD
sweh
This creates a shell variable. If you want to make it into an environment variable (which can be seen by sub-shells) you can export it.
e.g.
export BWD="$(basename $PWD)"
However, in this case don't need to run a command, but use shell variable expansion
BWD=${PWD##*/}
answered 1 min ago
Stephen HarrisStephen Harris
25.2k24477
add a comment |
In general the sequence foo="$(bar)" will run the command bar and assign the output to the variable.
e.g.
% echo $PWD
/home/sweh
% BWD="$(basename $PWD)"
% echo $BWD
sweh
This creates a shell variable. If you want to make it into an environment variable (which can be seen by sub-shells) you can export it.
e.g.
export BWD="$(basename $PWD)"
However, in this case don't need to run a command, but use shell variable expansion
BWD=${PWD##*/}
answered 1 min ago
Stephen HarrisStephen Harris
25.2k24477
add a comment |
In general the sequence foo="$(bar)" will run the command bar and assign the output to the variable.
e.g.
% echo $PWD
/home/sweh
% BWD="$(basename $PWD)"
% echo $BWD
sweh
This creates a shell variable. If you want to make it into an environment variable (which can be seen by sub-shells) you can export it.
e.g.
export BWD="$(basename $PWD)"
However, in this case don't need to run a command, but use shell variable expansion
BWD=${PWD##*/}
answered 1 min ago
Stephen HarrisStephen Harris
25.2k24477
In general the sequence foo="$(bar)" will run the command bar and assign the output to the variable.
e.g.
% echo $PWD
/home/sweh
% BWD="$(basename $PWD)"
% echo $BWD
sweh
This creates a shell variable. If you want to make it into an environment variable (which can be seen by sub-shells) you can export it.
e.g.
export BWD="$(basename $PWD)"
However, in this case don't need to run a command, but use shell variable expansion
BWD=${PWD##*/}
answered 1 min ago
Stephen HarrisStephen Harris
25.2k24477
answered 1 min ago
Stephen HarrisStephen Harris
25.2k24477
answered 1 min ago
Stephen HarrisStephen Harris
25.2k24477
answered 1 min ago
Stephen HarrisStephen Harris
25.2k24477
25.2k24477
add a comment |
add a comment |
Josh is a new contributor. Be nice, and check out our Code of Conduct.
Josh is a new contributor. Be nice, and check out our Code of Conduct.
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