This question already has answers here: Pipe output and capture exit status in Bash (15 answers) Closed 8 years ago. I have a shell script in which I wrap a command (mvn clean install), to redirect the output to a logfile. #!/bin/bash … mvn clean install $@ | tee $logfile echo $? # Does not … Read more
I am trying to create an alias that uses both multiple Git commands and positional parameters. There are Stackoverflow pages for each, and it would appear painfully obvious to do both, but I am having trouble. As an example, I want to switch to branch foo and perform a status. So in my .gitconfig, I … Read more
What’s wrong with the following code? name=”$filename | cut -f1 -d”.” As is, I get the literal string $filename | cut -f1 -d’.’, but if I remove the quotes I don’t get anything. Meanwhile, typing “test.exe” | cut -f1 -d’.’ in a shell gives me the output I want, test. I already know $filename has … Read more
I am trying to use xargs to call a more complex function in parallel. #!/bin/bash echo_var(){ echo $1 return 0 } seq -f “n%04g” 1 100 |xargs -n 1 -P 10 -i echo_var {} exit 0 This returns the error xargs: echo_var: No such file or directory Any ideas on how I can use xargs … Read more
I have a script that uses sh shell. I get an error in the line that uses the source command. It seems source is not included in my sh shell. If I explicitly try to run source from shell I get: sh: 1: source: not found Should I somehow install “source”? Do I have a … Read more
This question already has answers here: What is the difference between $(command) and `command` in shell programming? (6 answers) Closed 3 months ago. There are two ways to capture the output of command line in bash: Legacy Bourne shell backticks “: var=`command` $() syntax (which as far as I know is Bash specific, or at … Read more
I am using SH shell and I am trying to compare a string with a variable’s value but the if condition is always execute to true. Why? Here is some code: Sourcesystem=”ABC” if [ “$Sourcesystem” -eq ‘XYZ’ ]; then echo “Sourcesystem Matched” else echo “Sourcesystem is NOT Matched $Sourcesystem” fi; echo Sourcesystem Value is $Sourcesystem … Read more
I would like to say 10 lines max from grep. I don’t want my computer to work hard. I want it to stop after 10 results found by grep. Is it possible? 5 Answers 5
I’m trying to interpolate variables inside of a bash heredoc: var=$1 sudo tee “/path/to/outfile” > /dev/null << “EOF” Some text that contains my $var EOF This isn’t working as I’d expect ($var is treated literally, not expanded). I need to use sudo tee because creating the file requires sudo. Doing something like: sudo cat > … Read more
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 9 months ago. Improve this question I am running Ubuntu on computer 1 and computer 2. I compiled a C++ program on computer 1, and … Read more
