shell – Page 25 – Tarik Billa

Repository ‘http://security.debian.org/debian-security buster/updates InRelease’ changed its ‘Suite’ value from ‘stable’ to ‘oldstable’

December 19, 2022 by Tarik

I know you tried it with apt-get –allow-releaseinfo-change update but it worked for me. This is my command in the dockerfile: wget -q -O – https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add – \ && sh -c ‘echo “deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main” >> /etc/apt/sources.list.d/google.list’ \ && apt-get –allow-releaseinfo-change update \ && apt-get install -y google-chrome-unstable \ –no-install-recommends … Read more

how do I use the grep –include option for multiple file types?

December 18, 2022 by Tarik

You can use multiple –include flags. This works for me: grep -r –include=*.html –include=*.php –include=*.htm “pattern” /some/path/ However, you can do as Deruijter suggested. This works for me: grep -r –include=*.{html,php,htm} “pattern” /some/path/ Don’t forget that you can use find and xargs for this sort of thing too: find /some/path/ -name “*.htm*” -or -name “*.php” … Read more

Run java jar file on a server as background process

December 17, 2022 by Tarik

You can try this: #!/bin/sh nohup java -jar /web/server.jar & The & symbol, switches the program to run in the background. The nohup utility makes the command passed as an argument run in the background even after you log out.

shell-script headers (#!/bin/sh vs #!/bin/csh)

December 16, 2022 by Tarik

This is known as a Shebang: http://en.wikipedia.org/wiki/Shebang_(Unix) #!interpreter [optional-arg] A shebang is only relevant when a script has the execute permission (e.g. chmod u+x script.sh). When a shell executes the script it will use the specified interpreter. Example: #!/bin/bash # file: foo.sh echo 1 $ chmod u+x foo.sh $ ./foo.sh 1

How to get Erlang’s release version number from a shell?

December 16, 2022 by Tarik

erl -eval ‘erlang:display(erlang:system_info(otp_release)), halt().’ -noshell

What’s the difference between .bashrc, .bash_profile, and .environment?

December 15, 2022 by Tarik

The main difference with shell config files is that some are only read by “login” shells (eg. when you login from another host, or login at the text console of a local unix machine). these are the ones called, say, .login or .profile or .zlogin (depending on which shell you’re using). Then you have config … Read more

How to set environment variables in fish shell

December 12, 2022 by Tarik

Use Universal Variables. If the variable has to be shared between all the current user Fish instances on the current computer and preserved across restarts of the shell you can set them using -U or –universal. For example: set -Ux FOO bar Using set with -g or –global doesn’t set the variable persistently between shell … Read more

How do I append text to a file?

December 11, 2022 by Tarik

How about: echo “hello” >> <filename> Using the >> operator will append data at the end of the file, while using the > will overwrite the contents of the file if already existing. You could also use printf in the same way: printf “hello” >> <filename> Note that it can be dangerous to use the … Read more

How to use multiple arguments for awk with a shebang (i.e. #!)?

December 10, 2022 by Tarik

The shebang line has never been specified as part of POSIX, SUS, LSB or any other specification. AFAIK, it hasn’t even been properly documented. There is a rough consensus about what it does: take everything between the ! and the \n and exec it. The assumption is that everything between the ! and the \n … Read more

Passing argument to alias in bash [duplicate]

December 4, 2022 by Tarik

An alias will expand to the string it represents. Anything after the alias will appear after its expansion without needing to be or able to be passed as explicit arguments (e.g. $1). $ alias foo=’/path/to/bar’ $ foo some args will get expanded to $ /path/to/bar some args If you want to use explicit arguments, you’ll … Read more