On bash command-line, how to delete all letters before cursor? I know Ctrl-k deletes all afterward the cursor. Answer Ctrl-u – Cut everything before the cursor Other Bash shortcuts, Ctrl-a Move cursor to beginning of line Ctrl-e Move cursor to end of line Ctrl-b Move cursor back one word Ctrl-f Move cursor forward one word … Read more
On Linux, I have a –parents option available for the cp command so I can do cp –parents test/withintest/go.rb test2 http://www.gnu.org/software/coreutils/manual/html_node/cp-invocation.html On Mac, I do not have this option available. Is there a way to do this on Mac? Why is this option not available? PS. The purpose of –parents is the following: ‘–parents’ Form … Read more
As an exercise, does a method exist to redirect a string to a file without echo? Currently I am using echo “Hello world” > test.txt I know about cat and printf. I was thinking something like > test.txt <<<“Hello world” Of course this doesnt work, but maybe a similar command? Answer You can do this … Read more
In Linux, using the command tailf, how can I tail several log files that are inside a folder and in the subfolders? Answer To log all the files inside a folder, you can go to the folder and write tail -f *.log To add the subfolders to the tailf command, use tail -f **/*.log Of … Read more
Can I check to see if current machine is running 64bit OS or 32bit OS inside a batch file? EDIT: Found this online and it is good enough to me now: Answer This is the correct way to perform the check as-per Microsoft’s knowledgebase reference ( http://support.microsoft.com/kb/556009 ) that I have re-edited into just a … Read more
I’ve been looking at the following article about Headless Chrome: https://developers.google.com/web/updates/2017/04/headless-chrome I just upgraded Chrome on Windows 10 to version 60, but when I run either of the following commands from the command line, nothing seems to happen: chrome –headless –disable-gpu –dump-dom https://www.google.com/ chrome –headless –disable-gpu –print-to-pdf https://www.google.com/ And I’m running all of these commands … Read more
I have a utility (grep) that gives me a list of filenames and a line numbers. After I have determined that devenv is the correct program to open a file, I would like to ensure that it is opened at the indicated line number. In emacs, this would be: emacs +140 filename.c I have found … 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 11 days ago. The community reviewed whether to reopen this question 11 days ago and left it closed: Original close reason(s) were not resolved Improve … Read more
I have a directory e.g. /var/tmp/my-dir/ that I frequently compress with the following command: $ cd /var/tmp/ $ tar -zcf my-dir.tar.gz my-dir/* Later, when I untar my-dir.tar.gz, it’ll create my-dir/ in the current directory. It sounds like the my-dir directory is “wrapped” inside the tarball. Is there a tar option to rename my-dir to e.g. … Read more
How can I specify a multiline commit message for mercurial on the command line? hg commit -m “* add foo\n* fix bar” does not work. The log shows: changeset: 13:f2c6526e5911 tag: tip date: Fri Jan 23 23:22:36 2009 +0100 files: foobar.cpp description: * add foo\n*fix bar Answer Mercurial: multiline commit message on the command line? … Read more
