What does -o mean in an “if”? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern) 2019 Community Moderator Election Results Why I closed the “Why is Kali so hard” questionwhat does the -z flag mean hereWhat does || mean in bash?What does $'r' mean?What does `[ EXPRESSION ], [ ] and [OPTION` mean in `man test`?What does “< /dev/null” mean?What does “test $2 &&” mean in this bash script?What does “while :;” mean?What does this `-n` mean? [BASH]What does the backtick before/after dollar sign mean?Bash: What does “masking return values” mean?
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What does -o mean in an “if”?
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Community Moderator Election Results
Why I closed the “Why is Kali so hard” questionwhat does the -z flag mean hereWhat does || mean in bash?What does $'r' mean?What does `[ EXPRESSION ], [ ] and [OPTION` mean in `man test`?What does “< /dev/null” mean?What does “test $2 &&” mean in this bash script?What does “while :;” mean?What does this `-n` mean? [BASH]What does the backtick before/after dollar sign mean?Bash: What does “masking return values” mean?
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What is -o after -eq in the mentioned code:
...[ $sorszam -eq 0 ] && min1=$ertek; [ $sorszam -eq 1 -o $sorszam -eq 2 -o $sorszam -eq 3 ] && [ $ertek -lt $min1 ] && min1=$ertek...
bash test
edited Apr 13 at 15:01
Rui F Ribeiro
42.1k1484142
asked May 18 '17 at 14:26
Huntyr94Huntyr94
613
add a comment |
What is -o after -eq in the mentioned code:
...[ $sorszam -eq 0 ] && min1=$ertek; [ $sorszam -eq 1 -o $sorszam -eq 2 -o $sorszam -eq 3 ] && [ $ertek -lt $min1 ] && min1=$ertek...
bash test
edited Apr 13 at 15:01
Rui F Ribeiro
42.1k1484142
asked May 18 '17 at 14:26
Huntyr94Huntyr94
613
Note that-ois considered obsolete, and the correct way to write new code would be to use[ "$sorszam" -eq 1 ] || [ "$sorszam" -eq 2 ] || [ "$sorszam" -eq 3 ]instead.
– chepner
May 18 '17 at 18:18
add a comment |
What is -o after -eq in the mentioned code:
...[ $sorszam -eq 0 ] && min1=$ertek; [ $sorszam -eq 1 -o $sorszam -eq 2 -o $sorszam -eq 3 ] && [ $ertek -lt $min1 ] && min1=$ertek...
bash test
edited Apr 13 at 15:01
Rui F Ribeiro
42.1k1484142
asked May 18 '17 at 14:26
Huntyr94Huntyr94
613
What is -o after -eq in the mentioned code:
...[ $sorszam -eq 0 ] && min1=$ertek; [ $sorszam -eq 1 -o $sorszam -eq 2 -o $sorszam -eq 3 ] && [ $ertek -lt $min1 ] && min1=$ertek...
bash test
bash test
edited Apr 13 at 15:01
Rui F Ribeiro
42.1k1484142
asked May 18 '17 at 14:26
Huntyr94Huntyr94
613
edited Apr 13 at 15:01
Rui F Ribeiro
42.1k1484142
asked May 18 '17 at 14:26
Huntyr94Huntyr94
613
edited Apr 13 at 15:01
Rui F Ribeiro
42.1k1484142
edited Apr 13 at 15:01
Rui F Ribeiro
42.1k1484142
edited Apr 13 at 15:01
Rui F Ribeiro
42.1k1484142
42.1k1484142
asked May 18 '17 at 14:26
Huntyr94Huntyr94
613
asked May 18 '17 at 14:26
Huntyr94Huntyr94
613
asked May 18 '17 at 14:26
Huntyr94Huntyr94
613
613
Note that-ois considered obsolete, and the correct way to write new code would be to use[ "$sorszam" -eq 1 ] || [ "$sorszam" -eq 2 ] || [ "$sorszam" -eq 3 ]instead.
– chepner
May 18 '17 at 18:18
add a comment |
Note that-ois considered obsolete, and the correct way to write new code would be to use[ "$sorszam" -eq 1 ] || [ "$sorszam" -eq 2 ] || [ "$sorszam" -eq 3 ]instead.
– chepner
May 18 '17 at 18:18
Note that
-o is considered obsolete, and the correct way to write new code would be to use [ "$sorszam" -eq 1 ] || [ "$sorszam" -eq 2 ] || [ "$sorszam" -eq 3 ] instead.– chepner
May 18 '17 at 18:18
Note that
-o is considered obsolete, and the correct way to write new code would be to use [ "$sorszam" -eq 1 ] || [ "$sorszam" -eq 2 ] || [ "$sorszam" -eq 3 ] instead.– chepner
May 18 '17 at 18:18
add a comment |
3 Answers
3
active
oldest
votes
As you can see in the Linux Documentation Project page about if, -o stands for the logical operator OR. In your case, the variable sorszam is checked whether it equals to 1, 2, or 3.
answered May 18 '17 at 14:34
nikolasnikolas
310110
1
Ah, so it is just an "or". Thanks the documentation, didn't know there was such thing.
– Huntyr94
May 21 '17 at 16:46
add a comment |
As you should know [ is an equivalent to test built-in command.
$ help [
[: [ arg... ]
This is a synonym for the "test" builtin...
so you should have a look at help test | grep -- "-o ":
EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
answered May 18 '17 at 14:44
RavexinaRavexina
1,4531823
add a comment |
-eq is an arithmetic binary operator that returns true if both numbers are equal.
-o is an or, you can can string it together with -eq to do multiple comparisons in one line.
Source
answered May 18 '17 at 14:36
cutrightjmcutrightjm
2,26621325
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
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active
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votes
As you can see in the Linux Documentation Project page about if, -o stands for the logical operator OR. In your case, the variable sorszam is checked whether it equals to 1, 2, or 3.
answered May 18 '17 at 14:34
nikolasnikolas
310110
1
Ah, so it is just an "or". Thanks the documentation, didn't know there was such thing.
– Huntyr94
May 21 '17 at 16:46
add a comment |
As you can see in the Linux Documentation Project page about if, -o stands for the logical operator OR. In your case, the variable sorszam is checked whether it equals to 1, 2, or 3.
answered May 18 '17 at 14:34
nikolasnikolas
310110
1
Ah, so it is just an "or". Thanks the documentation, didn't know there was such thing.
– Huntyr94
May 21 '17 at 16:46
add a comment |
As you can see in the Linux Documentation Project page about if, -o stands for the logical operator OR. In your case, the variable sorszam is checked whether it equals to 1, 2, or 3.
answered May 18 '17 at 14:34
nikolasnikolas
310110
As you can see in the Linux Documentation Project page about if, -o stands for the logical operator OR. In your case, the variable sorszam is checked whether it equals to 1, 2, or 3.
answered May 18 '17 at 14:34
nikolasnikolas
310110
answered May 18 '17 at 14:34
nikolasnikolas
310110
answered May 18 '17 at 14:34
nikolasnikolas
310110
answered May 18 '17 at 14:34
nikolasnikolas
310110
310110
1
Ah, so it is just an "or". Thanks the documentation, didn't know there was such thing.
– Huntyr94
May 21 '17 at 16:46
add a comment |
1
Ah, so it is just an "or". Thanks the documentation, didn't know there was such thing.
– Huntyr94
May 21 '17 at 16:46
1
1
Ah, so it is just an "or". Thanks the documentation, didn't know there was such thing.
– Huntyr94
May 21 '17 at 16:46
Ah, so it is just an "or". Thanks the documentation, didn't know there was such thing.
– Huntyr94
May 21 '17 at 16:46
add a comment |
As you should know [ is an equivalent to test built-in command.
$ help [
[: [ arg... ]
This is a synonym for the "test" builtin...
so you should have a look at help test | grep -- "-o ":
EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
answered May 18 '17 at 14:44
RavexinaRavexina
1,4531823
add a comment |
As you should know [ is an equivalent to test built-in command.
$ help [
[: [ arg... ]
This is a synonym for the "test" builtin...
so you should have a look at help test | grep -- "-o ":
EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
answered May 18 '17 at 14:44
RavexinaRavexina
1,4531823
add a comment |
As you should know [ is an equivalent to test built-in command.
$ help [
[: [ arg... ]
This is a synonym for the "test" builtin...
so you should have a look at help test | grep -- "-o ":
EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
answered May 18 '17 at 14:44
RavexinaRavexina
1,4531823
As you should know [ is an equivalent to test built-in command.
$ help [
[: [ arg... ]
This is a synonym for the "test" builtin...
so you should have a look at help test | grep -- "-o ":
EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
answered May 18 '17 at 14:44
RavexinaRavexina
1,4531823
answered May 18 '17 at 14:44
RavexinaRavexina
1,4531823
answered May 18 '17 at 14:44
RavexinaRavexina
1,4531823
answered May 18 '17 at 14:44
RavexinaRavexina
1,4531823
1,4531823
add a comment |
add a comment |
-eq is an arithmetic binary operator that returns true if both numbers are equal.
-o is an or, you can can string it together with -eq to do multiple comparisons in one line.
Source
answered May 18 '17 at 14:36
cutrightjmcutrightjm
2,26621325
add a comment |
-eq is an arithmetic binary operator that returns true if both numbers are equal.
-o is an or, you can can string it together with -eq to do multiple comparisons in one line.
Source
answered May 18 '17 at 14:36
cutrightjmcutrightjm
2,26621325
add a comment |
-eq is an arithmetic binary operator that returns true if both numbers are equal.
-o is an or, you can can string it together with -eq to do multiple comparisons in one line.
Source
answered May 18 '17 at 14:36
cutrightjmcutrightjm
2,26621325
-eq is an arithmetic binary operator that returns true if both numbers are equal.
-o is an or, you can can string it together with -eq to do multiple comparisons in one line.
Source
answered May 18 '17 at 14:36
cutrightjmcutrightjm
2,26621325
answered May 18 '17 at 14:36
cutrightjmcutrightjm
2,26621325
answered May 18 '17 at 14:36
cutrightjmcutrightjm
2,26621325
answered May 18 '17 at 14:36
cutrightjmcutrightjm
2,26621325
2,26621325
add a comment |
add a comment |
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Note that
-ois considered obsolete, and the correct way to write new code would be to use[ "$sorszam" -eq 1 ] || [ "$sorszam" -eq 2 ] || [ "$sorszam" -eq 3 ]instead.– chepner
May 18 '17 at 18:18