Hi I'm working with hugo and I will change the path variable but its not applying. My question is about the settings on path variable that is not working properly when i type to cmd
echo %PATH%
Can you show what was the echo %PATH% output ?
Please take note that you need to make sure that there is no character spaces between the path that you are setting. For example
Incorrect:
C:\Program Files\nodejs\; ;C:\Hugo\bin;
Correct:
C:\Program Files\nodejs\;C:\Hugo\bin;
If it don't works just try to restart your command prompt then type
echo %PATH% output
to see if it works.
Related
I'm on Windows 10 and trying to run a startup script (vcvars64.bat) to setup the MSVC compiler before using the Alacritty prompt.
I have tried the -e switch with the command and also with the alacritty.yml shell: option, but both options open Alacritty, run the command, then exit.
How do I run a script on startup as the first command then continue into Alacritty?
Thanks,
Matic
What I ended up with is:
Specify program: cmd.exe in Alacritty alacritty.yml:
shell:
program: cmd.exe
Create a shortcut to Alacritty.exe and place it eg. in C:\ProgramData\Microsoft\Windows\Start Menu\Programs\ (so that it shows up in Windows search).
In properties for the shortcut, under target, specify:
"C:\Program Files\Alacritty\alacritty.exe" --command "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat >/NUL" && bash.exe
Modify Visual Studio path to whatever you have, and which varsall.bat you want to use.
The tricky part was how sensitive cmd.exe is regarding quotes. Eg., it does not work for me to specify an absolute path to which bash.exe to use, it would fail on the first whitespace in the path no matter how I tried to quote it. So make sure the correct bash.exe is first in your PATH (open plain cmd.exe and run where bash.exe to see order). Another solution is of course to create a shortcut to the bash.exe of your liking to a place without spaces in its path then specify it's absolute path (tested to work).
This question is specific to using cmake as part of Android Studio build process.
I'm using Android Studio 2.2 preview 7 on linux (ubuntu)
Inside the CMakeLists.txt I am able to access the Android NDK path using: ${ANDROID_NDK}
But how can I access:
Any environment variable ?
If not possible, at least the Android SDK path ?
I already tried to used $ENV{name_of_the_environment_variable_here} but it's always empty, even if the environment variable exist. I guess that when gradle invoke cmake it "hide" the env var somehow.
I don't think you can use $ENV, it's just an example of a variable because they're environment variables. However, you should be able to type env and hit enter for a list of the variables you currently have set. Then, the ones you see in the list, you can invoke by typing $VARIABLE_NAME, using a command before them to get them to do something. E.g. echo $VARIABLE will echo your variable to stdout.
I'm not sure how $ANDROID_SDK was set, if it was part of an install process, etc. but generally you would set user environment variables in .profile, .bash_profile or .bashrc configuration files. These files are read by the shell in that order. System-wide variables are set in /etc/environment, /etc/profile, and /etc/bash.bashrc, but you probably don't want to mess with those (most distros encourage making ancillary additions in /etc/profile.local, but that's a story for another answer).
It doesn't particularly matter which one of these files you use, unless what you're trying to do interacts with the order in which they are loaded. Generally, I look for where the variables have been set by either the OS or other stuff I've added and put them near those. You can find where environment variables are set by typing:
% for i in .profile .bash_profile .bashrc; do grep -H PATH $HOME/$i; done
(% is the prompt, don't type %)
.. and this will loop through the 3 files and show you if a user $PATH is set in any of them.
Bash uses the export ENV command as opposed to set ENV, which is from the original sh, which AFAIK is only default on FreeBSD and derivatives like pfSense anymore. Almost all other OS use Bash by default, except MacOS which recently moved to zsh and also uses export, and OpenBSD which uses ksh (nobody uses OpenBSD).
If you want to verify which shell you are using, type echo $SHELL, or echo $0 and hit enter, and it should let you know.
You can add the environment variable ephemerally by typing this command in your bash terminal and pressing enter:
% export ANDROID_SDK_ROOT=/home/username/AndroidSDK
To be clear, this is an example path, so it'd be best to use the actual path in which your android SDK files reside. However, this example was a default install location Android Studio tried to use when I installed it recently, so if you're not sure where they are, it's probably a good place to check.
To have a more permanent setting of your environment variable, open a text editor and add the line above to one of the configuration files I mentioned in the first paragraph (they'll be in your $HOME folder). Or, you can run this from the prompt and it'll add it to your file automatically:
% echo 'export ANDROID_SDK_ROOT=/home/username/AndroidSDK' >> $HOME/.bashrc
Take care to use two angle brackets and not one, as one angle bracket will overwrite the entire file with the single line.
How can I access Any environment variable ?
If you're not sure which folder is $HOME, try typing cd $HOME and hitting enter - that'll take you there. That's how you access environment variables - use a command with the invocation of the variable and it should act as if you had typed out the entire thing.
To access environment variables, type echo $NAME_OF_VARIABLE and it should echo it to the screen. If you want to search your three config files I mentioned in the beginning for where an environment variable is set, you can use grep as I did earlier, just changing the search string for whatever you're looking for. E.g. (while in $HOME):
% grep SDK_ROOT .bashrc .profile .bash_profile
Or you can type env to list all the currently set variables and filter them by piping the output to the grep command:
% env | grep SDK
If you want to just list all of the set variables and root around the entire thing, just type env instead of piping it to grep (grep's a filter).
Lastly, I'll give you an example of my $ANDROID_SDK_ROOT $ANDROID_SDK and $SDK_ROOT variables in my .bashrc - I noticed while installing these tools, they use all three (isn't that fun?):
% grep ANDROID .bashrc
export ANDROID_SDK=$HOME/development/Android/SDK
export ANDROID_SDK_ROOT=$HOME/development/Android/SDK
export PATH=$PATH:$ANDROID_SDK:$JAVA_HOME:$ANDROID_SDK/cmdline-tools/latest/bin:$ANDROID_SDK/build-tools/32.0.0:$ANDROID_SDK/emulator:$ANDROID_SDK/emulator/bin64:$ANDROID_SDK/tools:$ANDROID_SDK/tools/bin:$ANDROID_SDK/extras:$ANDROID_SDK/platform-tools:$HOME/development/AndroidStudio/bin
export ANDROID_STUDIO=$HOME/development/AndroidStudio
% grep SDK_ROOT .bashrc
export SDK_ROOT=$HOME/development/Android/SDK
export ANDROID_SDK_ROOT=$HOME/development/Android/SDK
Hope that answers some questions, sorry it took so long to give you a response.
I want to add the path to pycharm.sh to PATH (Pycharm community Edition 5.0.2), which is stored in /opt/pycharm-community-5.0.2/bin. At first I added the following line to /etc/environment, which was an empty file before:
PATH="/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/opt/pycharm-community-5.0.2/bin"
Afterward I tried to start Pycharm via terminal, without success:
$ pycharm
bash: pycharm: command not found.
My next step was to change the value of PATH inside the first if statement in /etc/profile as follows:
if [ "`id -u`" -eq 0 ]; then
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/pycharm-community-5.0.2/bin"
else
PATH="/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/opt/pycharm-community-5.0.2/bin"
fi
export PATH
I restarted the system after each step, but I still the receive the same error message.
Is there another way to permanently set the variable? What am I doing wrong?
Your executable filename is pycharm.sh, not pycharm. Try typing that instead.
You could also try which pycharm.sh, which attempts to locate given command using PATH environment variable, to see that your configuration works.
Hi I'm trying to add a directory to the path directly on my vagrant provision but something didn't work as expected. I'm using this line
echo PATH=\""$"PATH:/opt/paraviewopenfoam410/bin\" >> /home/vagrant/.profile
If I use it inside a terminal works as expected adding at the of the .profile the following line
PATH="$PATH:/opt/paraviewopenfoam410/bin"
But when using in vagrant provision the result is:
PATH="PATH:/opt/paraviewopenfoam410/bin"
Missing the $ symbol and breaking the PATH variable
When using the " it will resolve variable so no matter how you put it and escape it, vagrant will resolve the $PATH variable and output the result in your .profile
If you just want to have plain text $PATH you just need to do with '
echo PATH=\'$PATH:/opt/paraviewopenfoam410/bin\' >> /home/vagrant/.profile
will work just fine
I have a few questions on this $PATH in Linux.
I know it tells the shell which directories to search for executable files, so:
What does it mean an environmental variable?
How to change its path? and is it recommended to change it?
IF i change it what are the consequences?
To get your path current $PATH variable type in:
echo $PATH
It tells your shell where to look for binaries.
Yes, you can change it - for example add to the $PATH folder with your custom scripts.
So: if your scripts are in /usr/local/myscripts to execute them you will have to type in a full path to the script: /usr/local/myscripts/myscript.sh
After changing your $PATH variable you can just type in myscript.sh to execute script.
Here is an example of $PATH from RHEL:
/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/home/user/bin
To change your $PATH you have to either edit ~/.profile (or ~/.bash_profile) for user or global $PATH setting in /etc/profile.
One of the consequences of having inaccurate $PATH variables is that shell will not be able to find and execute programs without a full $PATH.
Firstly, you are correct in your statement of what $PATH does. If you were to break it somehow (as per your third point), you will have to manually type in /usr/bin/xyz if you want to run a program in /usr/bin from the terminal. Depending on how individual programs work, this might break some programs that invoke other ones, as they will expect to just be able to run ls or something.
So if you were to play around with $PATH, I would suggest saving it somewhere first. Use the command line instruction
echo $PATH > someRandomFile.txt
to save it in someRandomFile.txt
You can change $PATH using the export command. So
export PATH=someNewPath
HOWEVER, this will completely replace $PATH with someNewPath. Since items in path are separated by a ":", you can add items to it (best not to remove, see above) by executing
export PATH=$PATH:newPath
The fact that it is an environmental variable means that programs can find out its value, ie it is something that is set about the environment that the program is running in. Other environmental variables include things like the current directory and the address of the current proxy.
this is simple and i do like this way.
Open the linux bash shell and print the environment variables:
printenv
I copy "PATH" variable to a text editor and edit as I want. Then update the PATH like this
export PATH= /variable dir list/
It Works.
or if you want to add an single variable use this command.
export PATH = $PATH:/variable_dir_path/
This will extends the PATH with your new directory path.