source /etc/environment not working from bash script
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Running Ubuntu 18.04-x64
I run the following bash script:
#!/bin/bash
if [ -z $JAVA_HOME ]; then
PLACE=`which java`
QUOTE='"'
VAR_NAME="JAVA_HOME="
echo "$VAR_NAME$QUOTE$PLACE$QUOTE" >> /etc/environment
fi
source /etc/environment
I run echo $JAVA_HOME and get a blank output
If I enter the following commands in the terminal
source /etc/environment
echo $JAVA_HOME
I get /usr/bin/java as output
Why is source /etc/environment not working inside the script?
command-line bash scripts environment-variables
asked Mar 28 at 16:29
CrispJamCrispJam
53
add a comment |
Running Ubuntu 18.04-x64
I run the following bash script:
#!/bin/bash
if [ -z $JAVA_HOME ]; then
PLACE=`which java`
QUOTE='"'
VAR_NAME="JAVA_HOME="
echo "$VAR_NAME$QUOTE$PLACE$QUOTE" >> /etc/environment
fi
source /etc/environment
I run echo $JAVA_HOME and get a blank output
If I enter the following commands in the terminal
source /etc/environment
echo $JAVA_HOME
I get /usr/bin/java as output
Why is source /etc/environment not working inside the script?
command-line bash scripts environment-variables
asked Mar 28 at 16:29
CrispJamCrispJam
53
1
Are you runningecho $JAVA_HOMEfrom inside the script, or from the parent shell after executing the script? Thesourcecommand can only alter the environment of the former (unless you source the script itself)
– steeldriver
Mar 28 at 16:42
add a comment |
Running Ubuntu 18.04-x64
I run the following bash script:
#!/bin/bash
if [ -z $JAVA_HOME ]; then
PLACE=`which java`
QUOTE='"'
VAR_NAME="JAVA_HOME="
echo "$VAR_NAME$QUOTE$PLACE$QUOTE" >> /etc/environment
fi
source /etc/environment
I run echo $JAVA_HOME and get a blank output
If I enter the following commands in the terminal
source /etc/environment
echo $JAVA_HOME
I get /usr/bin/java as output
Why is source /etc/environment not working inside the script?
command-line bash scripts environment-variables
asked Mar 28 at 16:29
CrispJamCrispJam
53
Running Ubuntu 18.04-x64
I run the following bash script:
#!/bin/bash
if [ -z $JAVA_HOME ]; then
PLACE=`which java`
QUOTE='"'
VAR_NAME="JAVA_HOME="
echo "$VAR_NAME$QUOTE$PLACE$QUOTE" >> /etc/environment
fi
source /etc/environment
I run echo $JAVA_HOME and get a blank output
If I enter the following commands in the terminal
source /etc/environment
echo $JAVA_HOME
I get /usr/bin/java as output
Why is source /etc/environment not working inside the script?
command-line bash scripts environment-variables
command-line bash scripts environment-variables
asked Mar 28 at 16:29
CrispJamCrispJam
53
asked Mar 28 at 16:29
CrispJamCrispJam
53
asked Mar 28 at 16:29
CrispJamCrispJam
53
asked Mar 28 at 16:29
CrispJamCrispJam
53
asked Mar 28 at 16:29
CrispJamCrispJam
53
53
1
Are you runningecho $JAVA_HOMEfrom inside the script, or from the parent shell after executing the script? Thesourcecommand can only alter the environment of the former (unless you source the script itself)
– steeldriver
Mar 28 at 16:42
add a comment |
1
Are you runningecho $JAVA_HOMEfrom inside the script, or from the parent shell after executing the script? Thesourcecommand can only alter the environment of the former (unless you source the script itself)
– steeldriver
Mar 28 at 16:42
1
1
Are you running
echo $JAVA_HOME from inside the script, or from the parent shell after executing the script? The source command can only alter the environment of the former (unless you source the script itself)– steeldriver
Mar 28 at 16:42
Are you running
echo $JAVA_HOME from inside the script, or from the parent shell after executing the script? The source command can only alter the environment of the former (unless you source the script itself)– steeldriver
Mar 28 at 16:42
add a comment |
1 Answer
1
active
oldest
votes
You could source your script instead of executing it. Then the script's source command occurs in your current shell.
Also, JAVA_HOME should be a directory:
printf 'JAVA_HOME="%s"n' "$(dirname -- "$PLACE")" >> /etc/environment
that also allows you to drop the VAR and QUOTE vars
Also, you must use quotes: [ -z "$JAVA_HOME" ]
- if JAVA_HOME is actually empty, the shell sees
[ -z ] - with only a single argument, the
[command returns true if the argument itself is not empty. - Since the string "-z" is never empty, the condition is always true,
- and you'll get a new JAVA_HOME=... in the /etc/environment every time.
answered Mar 28 at 17:31
glenn jackmanglenn jackman
12.8k2545
1
Note that/etc/environmentdoes not use shell syntax and the quotes might be dangerous:X="Y"will set X to"Y"(including the quotes).
– PerlDuck
Mar 28 at 18:56
add a comment |
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1 Answer
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active
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1 Answer
1
active
oldest
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oldest
votes
active
oldest
votes
You could source your script instead of executing it. Then the script's source command occurs in your current shell.
Also, JAVA_HOME should be a directory:
printf 'JAVA_HOME="%s"n' "$(dirname -- "$PLACE")" >> /etc/environment
that also allows you to drop the VAR and QUOTE vars
Also, you must use quotes: [ -z "$JAVA_HOME" ]
- if JAVA_HOME is actually empty, the shell sees
[ -z ] - with only a single argument, the
[command returns true if the argument itself is not empty. - Since the string "-z" is never empty, the condition is always true,
- and you'll get a new JAVA_HOME=... in the /etc/environment every time.
answered Mar 28 at 17:31
glenn jackmanglenn jackman
12.8k2545
1
Note that/etc/environmentdoes not use shell syntax and the quotes might be dangerous:X="Y"will set X to"Y"(including the quotes).
– PerlDuck
Mar 28 at 18:56
add a comment |
You could source your script instead of executing it. Then the script's source command occurs in your current shell.
Also, JAVA_HOME should be a directory:
printf 'JAVA_HOME="%s"n' "$(dirname -- "$PLACE")" >> /etc/environment
that also allows you to drop the VAR and QUOTE vars
Also, you must use quotes: [ -z "$JAVA_HOME" ]
- if JAVA_HOME is actually empty, the shell sees
[ -z ] - with only a single argument, the
[command returns true if the argument itself is not empty. - Since the string "-z" is never empty, the condition is always true,
- and you'll get a new JAVA_HOME=... in the /etc/environment every time.
answered Mar 28 at 17:31
glenn jackmanglenn jackman
12.8k2545
1
Note that/etc/environmentdoes not use shell syntax and the quotes might be dangerous:X="Y"will set X to"Y"(including the quotes).
– PerlDuck
Mar 28 at 18:56
add a comment |
You could source your script instead of executing it. Then the script's source command occurs in your current shell.
Also, JAVA_HOME should be a directory:
printf 'JAVA_HOME="%s"n' "$(dirname -- "$PLACE")" >> /etc/environment
that also allows you to drop the VAR and QUOTE vars
Also, you must use quotes: [ -z "$JAVA_HOME" ]
- if JAVA_HOME is actually empty, the shell sees
[ -z ] - with only a single argument, the
[command returns true if the argument itself is not empty. - Since the string "-z" is never empty, the condition is always true,
- and you'll get a new JAVA_HOME=... in the /etc/environment every time.
answered Mar 28 at 17:31
glenn jackmanglenn jackman
12.8k2545
You could source your script instead of executing it. Then the script's source command occurs in your current shell.
Also, JAVA_HOME should be a directory:
printf 'JAVA_HOME="%s"n' "$(dirname -- "$PLACE")" >> /etc/environment
that also allows you to drop the VAR and QUOTE vars
Also, you must use quotes: [ -z "$JAVA_HOME" ]
- if JAVA_HOME is actually empty, the shell sees
[ -z ] - with only a single argument, the
[command returns true if the argument itself is not empty. - Since the string "-z" is never empty, the condition is always true,
- and you'll get a new JAVA_HOME=... in the /etc/environment every time.
answered Mar 28 at 17:31
glenn jackmanglenn jackman
12.8k2545
answered Mar 28 at 17:31
glenn jackmanglenn jackman
12.8k2545
answered Mar 28 at 17:31
glenn jackmanglenn jackman
12.8k2545
answered Mar 28 at 17:31
glenn jackmanglenn jackman
12.8k2545
12.8k2545
1
Note that/etc/environmentdoes not use shell syntax and the quotes might be dangerous:X="Y"will set X to"Y"(including the quotes).
– PerlDuck
Mar 28 at 18:56
add a comment |
1
Note that/etc/environmentdoes not use shell syntax and the quotes might be dangerous:X="Y"will set X to"Y"(including the quotes).
– PerlDuck
Mar 28 at 18:56
1
1
Note that
/etc/environment does not use shell syntax and the quotes might be dangerous: X="Y" will set X to "Y" (including the quotes).– PerlDuck
Mar 28 at 18:56
Note that
/etc/environment does not use shell syntax and the quotes might be dangerous: X="Y" will set X to "Y" (including the quotes).– PerlDuck
Mar 28 at 18:56
add a comment |
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1
Are you running
echo $JAVA_HOMEfrom inside the script, or from the parent shell after executing the script? Thesourcecommand can only alter the environment of the former (unless you source the script itself)– steeldriver
Mar 28 at 16:42