[java] keytool error bash: keytool: command not found

I have tried to execute keytool from Java bin directory but I get an error with warning bash: keytool: command not found.

root@xxxxxx]# keytool -genkey -alias mypassword -keyalg RSA

bash: keytools: command not found

Ensure jre is installed.

cd /path/to/jre/bin/folder

As keytool file is present in the bin folder of jre, give path till bin as in the command above.

Then you can do:

keytool -genkey -alias aliaskeyname -keyalg RSA -keystore C:\mykeystore

The additional option -keystore will help you to specify the path where you want the generated self signed certificate.

find your jre location ::sudo find / -name jre And then :: sudo update-alternatives --install /usr/bin/keytool keytool /opt/jdk/<jdk.verson>/jre/bin/keytool 100

In Windows 10, you need to add a double slash

./keytool -genkey -v -keystore c:\\Users\\USERNAME\\youralias.jks -storetype JKS -keyalg RSA -keysize 2048 -validity 10000 -alias youralias

It seems that calling sudo update-alternatives --config java effects keytool. Depending on which version of Java is chosen it changes whether or not keytool is on the path. I had to chose the open JDK instead of Oracle's JDK to not get bash: /usr/bin/keytool: No such file or directory.

If you are looking for keytool because you are working with Android studio / Google Firebase, there is a keytool bundled with Android Studio. After extracting the zip file, the path to keytool is android-studio/jre/bin.

Keytool comes with your Java library. So you have to execute the Keytool command from your /Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/jre/bin directory. Or you can add JAVA_HOME to your environmental variables (Windows) or ~/.bash_profile (Linux)

You tried:

sudo apt-get install oracle-java6-installer --reinstall

and:

sudo update-alternatives --config keytool

Use

./keytool -genkey -alias mypassword -keyalg RSA

Please follow the steps:

1. first set the domain using setDomain.sh command go to domain/bin location and execute ./setDomain.sh command

2. go to java/bin folder and execute keytool command.

keytool -genkey -keyalg RSA -kaysize 2048 -alias name -kaystore file.jks

This worked for me

sudo apt install openjdk-8-jre-headless

If the jre is installed on your machine properly then look for keytool in jre or in jre/bin

1. to find where jre is installed, use this

   sudo find / -name jre

2. Then look for keytool in path_to_jre or in path_to_jre/bin

3. cd to keytool location

4. then run ./keytool

5. Make sure to add the the path to $PATH by

   export PATH=$PATH:location_to_keytool

6. To make sure you got it right after this, run

   where keytool

7. for future edit you bash or zshrc file and source it

You could also put this on one line like so:

/path/to/jre/bin/keytool -genkey -alias [mypassword] -keyalg [RSA]

Wanted to include this as a comment on piet.t answer but I don't have enough rep to comment.

See the "signing" section of this article that describes how to access the keytool.exe without changing your working directory to the path: https://flutter.dev/docs/deployment/android#signing-the-app

Note that they say you can type in space separated folder names like /"Program Files"/ with quotes but I found in bash i had to separate with back slashes like /Program\ Files/.

If you are not using openjdk, use the below commands to set your keytool.

sudo update-alternatives --install "/usr/bin/keytool" "keytool" "/usr/lib/jvm/java8/jdk1.8.0_251/bin/keytool" 1

AND

sudo update-alternatives --set keytool /usr/lib/jvm/java8/jdk1.8.0_251/bin/keytool

This worked for me!