Globbing is the * and ? and some other pattern matchers you may be familiar with. Globbing interprets the standard wild card characters * and ?, character lists in square brackets, and certain other special characters (such as ^ for negating the sense of a match). When the shell sees a glob, it will perform … Read more
First, let’s demonstrate that head is actually working correctly: $ printf ‘\xef\xbb\xbf’ >file $ head -c 3 file $ head -c 3 file | hexdump -C 00000000 ef bb bf |…| 00000003 Now, let’s create a working function has_bom. If your grep supports -P, then one option is: $ has_bom() { head -c3 “$1” | … Read more
You are looking for pwd.
find . -name “.*” -print I don’t know the MAC OS, but that is how you find them all in most *nix environments. find . -name “.*” -exec rm -rf {} \; to get rid of them… do the first find and make sure that list is what you want before you delete them all. … Read more
This question has been asked in another thread, and this is the best answer IMO: export LOG_FILE_PATH=/expanded/path/of/the/log/file/../logfile.log cat Text_File.msh | envsubst > Text_File_expanded.msh if on Mac, install gettext first: brew install gettext see: Forcing bash to expand variables in a string loaded from a file
There is no easy way to get this information without special application. There is an app especially designed for this only purpose – called AKKU. It worked with Bose and Sony’s headphones (checked) https://github.com/jariz/Akku/ Remember to download version 0.1.0-beta.10. The app works after restart.
If the lines are all unique you could grep the lines you want to remove into a file, and then use that file to remove the lines from the original, e.g. grep -C 2 “line I don’t want” < A.txt > B.txt grep -f B.txt A.txt
From LSP (page 28): Yes, this function’s name is missing an e. Ken Thompson, the creator of Unix, once joked that the missing letter was his largest regret in the design of Unix.
a.txt: 1;john;125;3 1;tom;56;2 2;jack;10;5 b.txt: 1;john;125;3 1;tom;58;2 2;jack;10;5 Use comm: comm -13 a.txt b.txt 1;tom;58;2 The command line options to comm are pretty straight-forward: -1 suppress column 1 (lines unique to FILE1) -2 suppress column 2 (lines unique to FILE2) -3 suppress column 3 (lines that appear in both files)
To do it in place, if your sed supports the -i option, you can do: sed -i ‘/^string/d’ input-file