I’d recommend using the BFG Repo-Cleaner, a simpler, faster alternative to git-filter-branch specifically designed for rewriting files from Git history. You should carefully follow these steps here: https://rtyley.github.io/bfg-repo-cleaner/#usage – but the core bit is just this: download the BFG’s jar (requires Java 7 or above) and run this command: $ java -jar bfg.jar –replace-text replacements.txt … Read more
Just use ‘EOF’ to prevent the variable from expanding: sudo /bin/su -c “cat << ‘EOF’ > /etc/init.d/my-script # ^ ^ From man bash: Here Documents This type of redirection instructs the shell to read input from the current source until a line containing only delimiter (with no trailing blanks) is seen. All of the lines … Read more
TL;DR: Since you are using Bash specific features, your script has to run with Bash and not with sh: $ sh myscript.sh myscript.sh: 2: myscript.sh: Bad substitution $ bash myscript.sh ffmpeg -i bar.mp4 bar.mp3 ffmpeg -i foo.mp4 foo.mp3 See Difference between sh and Bash. To find out which sh you are using: readlink -f $(which … Read more
Variables inside ‘ don’t get substituted in Bash. To get string substitution (or interpolation, if you’re familiar with Perl) you would need to change it to use double quotes ” instead of the single quotes: # Enclose the entire expression in double quotes $ sed “s/draw($prev_number;n_)/draw($number;n_)/g” file.txt > tmp # Or, concatenate strings with only … Read more
with sed sed -r ‘s_([^/]+/)__’ similarly with awk awk ‘{sub(/[^/]+\//,””)}1’ however, cut is the most proper tool for this task cut -d/ -f2-
This is normally solved with just a String#replaceAll, but since you have a custom, dynamic replacement string, you can to use a Matcher to efficiently and concisely do the string replacement. public static String parse(String command, String… args) { StringBuffer sb = new StringBuffer(); Matcher m = Pattern.compile(“\\$(\\d+)”).matcher(command); while (m.find()) { int num = Integer.parseInt(m.group(1)); … Read more