How to start a program with bash -c, redirect / disable GUI of that app
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0
down vote
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Currently I'm starting a java application with
bash -c java -jar app.jar -config config.json
The app opens a window, displaying some output and closes. The output is also available on stdout, so I don't need (want) the GUI to display.
How can I prevent bash to forward the X output?
Follow up:
I'm running this in a go application, so based on el.pescado's answer, I have implemented this as:
func runcmd(cmd string, workdir string) (byte, error) {
ex := exec.Command("bash", "-c", cmd)
ex.Env = string{"DISPLAY= "}
ex.Dir = workdir
return ex.Output()
}
bash
go asked yesterday
G-M
961111
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up vote
0
down vote
favorite
Currently I'm starting a java application with
bash -c java -jar app.jar -config config.json
The app opens a window, displaying some output and closes. The output is also available on stdout, so I don't need (want) the GUI to display.
How can I prevent bash to forward the X output?
Follow up:
I'm running this in a go application, so based on el.pescado's answer, I have implemented this as:
func runcmd(cmd string, workdir string) (byte, error) {
ex := exec.Command("bash", "-c", cmd)
ex.Env = string{"DISPLAY= "}
ex.Dir = workdir
return ex.Output()
}
bash
go asked yesterday
G-M
961111
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Currently I'm starting a java application with
bash -c java -jar app.jar -config config.json
The app opens a window, displaying some output and closes. The output is also available on stdout, so I don't need (want) the GUI to display.
How can I prevent bash to forward the X output?
Follow up:
I'm running this in a go application, so based on el.pescado's answer, I have implemented this as:
func runcmd(cmd string, workdir string) (byte, error) {
ex := exec.Command("bash", "-c", cmd)
ex.Env = string{"DISPLAY= "}
ex.Dir = workdir
return ex.Output()
}
bash
go asked yesterday
G-M
961111
Currently I'm starting a java application with
bash -c java -jar app.jar -config config.json
The app opens a window, displaying some output and closes. The output is also available on stdout, so I don't need (want) the GUI to display.
How can I prevent bash to forward the X output?
Follow up:
I'm running this in a go application, so based on el.pescado's answer, I have implemented this as:
func runcmd(cmd string, workdir string) (byte, error) {
ex := exec.Command("bash", "-c", cmd)
ex.Env = string{"DISPLAY= "}
ex.Dir = workdir
return ex.Output()
}
bash
go bash
go asked yesterday
G-M
961111
asked yesterday
G-M
961111
edited yesterday
asked yesterday
G-M
961111
asked yesterday
G-M
961111
asked yesterday
G-M
961111
961111
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
2
down vote
accepted
You have several options:
- First, you should check if that application can run without GUI (often called "headless" mode)
- You can unset
DISPLAYvariable, so that your app won't find your X11 server - but keep in mind that application might not work without X server
eg.
DISPLAY= bash -c java -jar app.jar -config config.json # note space after '='
# or
env -u DISPLAY bash -c java -jar app.jar -config config.json
- You could use in-memory virtual X server such as xfvb and point your application to display its windows there.
eg.
Xvfb :1 -screen 0 1600x1200x32
DISPLAY=:1 bash -c java -jar app.jar -config config.json
answered yesterday
el.pescado
15.7k22771
Thanks, works like a charm!
– G-M
yesterday
@G-M Which solution works for you ?
– mgagnon
yesterday
@mgagnon #2DISPLAY= bash -c java -jar app.jar -config config.json
– G-M
yesterday
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
You have several options:
- First, you should check if that application can run without GUI (often called "headless" mode)
- You can unset
DISPLAYvariable, so that your app won't find your X11 server - but keep in mind that application might not work without X server
eg.
DISPLAY= bash -c java -jar app.jar -config config.json # note space after '='
# or
env -u DISPLAY bash -c java -jar app.jar -config config.json
- You could use in-memory virtual X server such as xfvb and point your application to display its windows there.
eg.
Xvfb :1 -screen 0 1600x1200x32
DISPLAY=:1 bash -c java -jar app.jar -config config.json
answered yesterday
el.pescado
15.7k22771
Thanks, works like a charm!
– G-M
yesterday
@G-M Which solution works for you ?
– mgagnon
yesterday
@mgagnon #2DISPLAY= bash -c java -jar app.jar -config config.json
– G-M
yesterday
add a comment |
up vote
2
down vote
accepted
You have several options:
- First, you should check if that application can run without GUI (often called "headless" mode)
- You can unset
DISPLAYvariable, so that your app won't find your X11 server - but keep in mind that application might not work without X server
eg.
DISPLAY= bash -c java -jar app.jar -config config.json # note space after '='
# or
env -u DISPLAY bash -c java -jar app.jar -config config.json
- You could use in-memory virtual X server such as xfvb and point your application to display its windows there.
eg.
Xvfb :1 -screen 0 1600x1200x32
DISPLAY=:1 bash -c java -jar app.jar -config config.json
answered yesterday
el.pescado
15.7k22771
Thanks, works like a charm!
– G-M
yesterday
@G-M Which solution works for you ?
– mgagnon
yesterday
@mgagnon #2DISPLAY= bash -c java -jar app.jar -config config.json
– G-M
yesterday
add a comment |
up vote
2
down vote
accepted
up vote
2
down vote
accepted
You have several options:
- First, you should check if that application can run without GUI (often called "headless" mode)
- You can unset
DISPLAYvariable, so that your app won't find your X11 server - but keep in mind that application might not work without X server
eg.
DISPLAY= bash -c java -jar app.jar -config config.json # note space after '='
# or
env -u DISPLAY bash -c java -jar app.jar -config config.json
- You could use in-memory virtual X server such as xfvb and point your application to display its windows there.
eg.
Xvfb :1 -screen 0 1600x1200x32
DISPLAY=:1 bash -c java -jar app.jar -config config.json
answered yesterday
el.pescado
15.7k22771
You have several options:
- First, you should check if that application can run without GUI (often called "headless" mode)
- You can unset
DISPLAYvariable, so that your app won't find your X11 server - but keep in mind that application might not work without X server
eg.
DISPLAY= bash -c java -jar app.jar -config config.json # note space after '='
# or
env -u DISPLAY bash -c java -jar app.jar -config config.json
- You could use in-memory virtual X server such as xfvb and point your application to display its windows there.
eg.
Xvfb :1 -screen 0 1600x1200x32
DISPLAY=:1 bash -c java -jar app.jar -config config.json
answered yesterday
el.pescado
15.7k22771
answered yesterday
el.pescado
15.7k22771
answered yesterday
el.pescado
15.7k22771
answered yesterday
el.pescado
15.7k22771
15.7k22771
Thanks, works like a charm!
– G-M
yesterday
@G-M Which solution works for you ?
– mgagnon
yesterday
@mgagnon #2DISPLAY= bash -c java -jar app.jar -config config.json
– G-M
yesterday
add a comment |
Thanks, works like a charm!
– G-M
yesterday
@G-M Which solution works for you ?
– mgagnon
yesterday
@mgagnon #2DISPLAY= bash -c java -jar app.jar -config config.json
– G-M
yesterday
Thanks, works like a charm!
– G-M
yesterday
Thanks, works like a charm!
– G-M
yesterday
@G-M Which solution works for you ?
– mgagnon
yesterday
@G-M Which solution works for you ?
– mgagnon
yesterday
@mgagnon #2
DISPLAY= bash -c java -jar app.jar -config config.json– G-M
yesterday
@mgagnon #2
DISPLAY= bash -c java -jar app.jar -config config.json– G-M
yesterday
add a comment |
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