Typical shell scripts begin by parsing the options and arguments passed on the command line. The number of arguments is stored in the # parameter, i.e., you get it with $#. For example, if your scripts requires exactly three arguments, you can do something like this: if [ $# -lt 3 ]; then echo 1>&2 … Read more
You have some extra quotes in there and test1 needs to be [“test1”] jq “.environments.${Environment_Name} += [\”test1\”]” tmp.json
The docker shell syntax (which is just a string as the RUN, ENTRYPOINT, and CMD) will run that string as the parameter to /bin/sh -c. This gives you a shell to expand variables, sub commands, piping output, chaining commands together, and other shell conveniences. RUN ls * | grep $trigger_filename || echo file missing && … Read more
Sounds like you want: path=”$(pwd)/some/path” The $( opens a subshell (and the ) closes it) where the contents are executed as a script so any outputs are put in that location in the string. More useful often is getting the directory of the script that is running: dot=”$(cd “$(dirname “$0″)”; pwd)” path=”$dot/some/path” That’s more useful … Read more
You can always manually delete the packages; you can run: sudo rm -rf /usr/local/lib/python2.7/dist-packages/twitter to remove that package from your dist-packages directory. You may have to edit the easy-install.pth file in the same directory and remove the twitter entry from it.
The NF variable is set to the total number of fields in the input record. So: echo “a b c d” | awk –field-separator=” ” “{ print NF }” will display 4 Note, however, that: echo -e “a b c d\na b” | awk –field-separator=” ” “{ print NF }” will display: 4 2 Hope … Read more
Since the value of $var is the empty string, this: if [ $var == $var1 ]; then expands to this: if [ == abcd ]; then which is a syntax error. You need to quote the arguments: if [ “$var” == “$var1” ]; then You can also use = rather than ==; that’s the original … Read more
The following sed example should solve your problem. sed allows multiple -e switches, which allows you to replace more than one thing at a time. sed -e ‘s/dog/monkey/g’ -e ‘s/orange/cow/g’
Looks like ffmpeg sends all diagnostic messages (the “console output”) to stderr instead of stdout. Below code works for me. package main import ( “bufio” “fmt” “os/exec” “strings” ) func main() { args := “-i test.mp4 -acodec copy -vcodec copy -f flv rtmp://aaa/bbb” cmd := exec.Command(“ffmpeg”, strings.Split(args, ” “)…) stderr, _ := cmd.StderrPipe() cmd.Start() scanner … Read more