If you want the password prompt to go away then use key based authentication (described here). To run commands remotely over ssh you have to give them as an argument to ssh, like the following: root@host:~ # ssh root@www ‘ps -ef | grep apache | grep -v grep | wc -l’
I am very, very new to UNIX programming (running on MacOSX Mountain Lion via Terminal). I’ve been learning the basics from a bioinformatics and molecular methods course (we’ve had two classes) where we will eventually be using perl and python for data management purposes. Anyway, we have been tasked with writing a shell script to … Read more
I guess you are looking for brace expansion: take a look here, it would be helpful for you if you want to handle multiple files once : http://www.tldp.org/LDP/abs/html/globbingref.html tab completion with zsh…
Bash alias does not directly accept parameters. You will have to create a function. alias does not accept parameters but a function can be called just like an alias. For example: By the way, Bash functions defined in your .bashrc and other files are available as commands within your shell. So for instance you can … Read more
Here documents are often used for this purpose. They are supported in all Bourne-derived shells including all versions of Bash.
You are looking for -H option in gnu grep. Here is the explanation
Here are the docs to install nokogiri https://nokogiri.org/tutorials/installing_nokogiri.html, there is a note for rvm: Note for RVM users: you may require libgmp, consider running sudo apt-get install libgmp-dev. Remove ruby with rvm https://rvm.io/rubies/removing Install Ruby Rails For a existing project
From the xargs man page: This manual page documents the GNU version of xargs. xargs reads items from the standard input, delimited by blanks (which can be protected with double or single quotes or a backslash) or newlines, and executes the command (default is /bin/echo) one or more times with any initial- arguments followed by items read … Read more
Did you try just passing the string variable to a for loop? Bash, for one, will split on whitespace automatically.
Yes, it’s called ~/.zshenv. Here’s how I have $JAVA_HOME set in ~/.zshenv: Keep in mind, however, that zsh is not bash, so just ’cause you have to source your .bash_profile every time you open a terminal does not mean that you have to do that with zsh. With zsh, I only have to re-source my ~/.zshenv when I make changes to it, and then only for terminals which … Read more