That message is usually an indication that some of your files have modification times later than the current system time. Since make decides which files to compile when performing an incremental build by checking if a source files has been modified more recently than its object file, this situation can cause unnecessary files to be … Read more
Quote your variables. Here is it why: $ f=”fafafda > adffd > adfadf > adfafd > afd” $ echo $f fafafda adffd adfadf adfafd afd $ echo “$f” fafafda adffd adfadf adfafd afd Without quotes, the shell replaces $TEMP with the characters it contains (one of which is a newline). Then, before invoking echo shell … Read more
SIGTERM and SIGKILL are intended for general purpose “terminate this process” requests. SIGTERM (by default) and SIGKILL (always) will cause process termination. SIGTERM may be caught by the process (e.g. so that it can do its own cleanup if it wants to), or even ignored completely; but SIGKILL cannot be caught or ignored. SIGINT and … Read more
You can create jupyter_notebook_config.py by: jupyter notebook –generate-config Then you go to ~/.jupyter/jupyter_notebook_config.py and change # c.NotebookApp.browser=”” to for example: c.NotebookApp.browser=”/usr/bin/google-chrome %s” You can choose which ever browser is installed. You’ll find the path for example by typing which firefox Do not forget to delete the #
Basically, it’s a shell script prepended to a compressed archive of some sort, such as a tar archive. You use the tail or sed command on yourself (the $0 variable in Bourne shell) to strip off the shell script at the front and pass the rest to your unarchiver. For example, create the following script … Read more
Looking, it turns out on my system there is an envsubst command which is part of the gettext-base package. So, this makes it easy: envsubst < “source.txt” > “destination.txt” Note if you want to use the same file for both, you’ll have to use something like moreutil’s sponge, as suggested by Johnny Utahh: envsubst < … Read more
Misspellings are irritating, aren’t they? Check your spelling of empty, but then also try this: #!/bin/bash -e if [ -s diff.txt ]; then # The file is not-empty. rm -f empty.txt touch full.txt else # The file is empty. rm -f full.txt touch empty.txt fi I like shell scripting a lot, but one disadvantage of … Read more
Here’s a one-liner that doesn’t use/require the new job to be in a file: (crontab -l 2>/dev/null; echo “*/5 * * * * /path/to/job -with args”) | crontab – The 2>/dev/null is important so that you don’t get the no crontab for username message that some *nixes produce if there are currently no crontab entries.
The pid files contains the process id (a number) of a given program. For example, Apache HTTPD may write its main process number to a pid file – which is a regular text file, nothing more than that – and later use the information there contained to stop itself. You can also use that information … Read more
Do you have a “shared object” (usually a shared library on AIX), a UNIX shared library, or a Windows DLL? These are all different things, and your question conflates them all 🙁 For an AIX shared object, use dump -Tv /path/to/foo.o. For an ELF shared library, use readelf -Ws –dyn-syms /path/to/libfoo.so, or (if you have … Read more