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2 votes

2 answers

47k views

I am calling a bash script that has a number of flags in the following manner: /home/username/myscript -a -b 76 So to illustrate, the -a flag does something in myscript and the -b flag sets some ...

3 votes

1 answer

4k views

Is this a Bash bug? $ mkdir test && cd test && echo "a" > "some.file" test$ echo '*' * test$ TEST=$(echo '*') test$ echo $TEST some.file Why is the second output the resolution of *...

-1 votes

2 answers

19k views

A file is modified by a script using an input file- 141,141_1,BAR,HONDA,ps2_0,unassigned,ps3_0,Unassigned,ps4_0,Unassigned,ps5_0,Unassigned,ps6_0,Unassigned,ps7_3,TILL WILL,..... Input file- 141,...

1 vote

1 answer

5k views

I am trying to pass a variable that contains spaces from bash to awk. I have simple a simple script for doing this with single string variables (in which I am searching the first column of the FILE ...

0 votes

1 answer

1k views

I have a script that takes filenames as positional parameters. I perform a few operations on these and then tar them. Currently my script is not working. The echo line is there for debugging ...

0 votes

0 answers

47 views

just starting out BASH and Linux in general. I've been struggling to add spaces for this variable and it'll be great help if someone could guide me here. I tried this and didn't work" $ line2=&...

0 votes

0 answers

43 views

I have written a Bash script which doesn't behave quite as I expected. It contains the following lines of code. TARGET_FOLDER=1ドル echo "TARGET_FOLDER: $TARGET_FOLDER" if [ ! -d $TARGET_FOLDER ...

844 votes

5 answers

391k views

I have seen -- used in the compgen command. For example: compgen -W "foo bar baz" -- b What is the meaning of the -- in there?

378 votes

6 answers

420k views

... or an introductory guide to robust filename handling and other string passing in shell scripts. I wrote a shell script which works well most of the time. But it chokes on some inputs (e.g. on some ...

287 votes

5 answers

78k views

Is using a while loop to process text generally considered bad practice in POSIX shells? As Stéphane Chazelas pointed out, some of the reasons for not using shell loop are conceptual, reliability, ...

213 votes

6 answers

337k views

$ ls -l /tmp/test/my\ dir/ total 0 I was wondering why the following ways to run the above command fail or succeed? $ abc='ls -l "/tmp/test/my dir"' $ $abc ls: cannot access '"/tmp/test/my': No such ...

95 votes

9 answers

303k views

Is there an issue with sed and new line character? I have a file test.txt with the following contents aaaaa bbbbb ccccc ddddd The following does not work: sed -r -i 's/\n/,/g' test.txt I ...

182 votes

1 answer

81k views

The old advice used to be to double-quote any expression involving a $VARIABLE, at least if one wanted it to be interpreted by the shell as one single item, otherwise, any spaces in the content of $...

98 votes

5 answers

144k views

I am working through SSH on a WD My Book World Edition. Basically I would like to start at a particular directory level, and recursively remove all sub-directories matching .Apple*. How would I go ...

61 votes

7 answers

79k views

I know that a custom IFS value can be set for the scope of a single command/built-in. Is there a way to set a custom IFS value for a single statement?? Apparently not, since based on the below the ...