Ubuntu12.04 安装PyCharm

浏览数：174 / 时间：2015年06月20日

1. 下载

选择Linux Tab，选择下载免费的Community Edition【1】。当前版本是3.4

2. 安装PyCharm

按照官网给出的安装指导【2】进行安装。

（1） Copy the pycharm-*.tar.gz to the desired installation location (make sure you have rw permissions for that directory)

$ cd Downloads/

（2）Unpack the pycharm-*.tar.gz using the following command: tar xfz pycharm-*.tar.gz

$ tar xfz pycharm-*.tar.gz

（3）Remove the pycharm-*.tar.gz to save disk space (optional)

$ rm pycharm-*.tar.gz

（4）Run pycharm.sh from the bin subdirectory

$ cd pycharm-community-3.4.1/bin/

$ ./pycharm.sh

但是安装开始，出现如下错误：

ERROR: Cannot start PyCharm

No JDK found. Please validate either PYCHARM_JDK, JDK_HOME or JAVA_HOME environment variable points to valid JDK installation.

打开pycharm.ch文件查看，发现报错的地方在：

message()
{
  TITLE

="Cannot start PyCharm"

  if [ -t 1 ]; then
    echo "ERROR: $TITLE\n$1"
  elif [ -n `which zenity` ]; then
    zenity --error --title="$TITLE" --text="$1"
  elif [ -n `which kdialog` ]; then
    kdialog --error --title "$TITLE" "$1"
  elif [ -n `which xmessage` ]; then
    xmessage -center "ERROR: $TITLE: $1"
  elif [ -n `which notify-send` ]; then
    notify-send "ERROR: $TITLE: $1"
  else

echo "ERROR: $TITLE\n$1"

  fi
}

# ---------------------------------------------------------------------
# Locate a JDK installation directory which will be used to run the IDE.
# Try (in order): PYCHARM_JDK, JDK_HOME, JAVA_HOME, "java" in PATH.
# ---------------------------------------------------------------------
if [ -n "$PYCHARM_JDK" -a -x "$PYCHARM_JDK/bin/java" ]; then
  JDK="$PYCHARM_JDK"
elif [ -n "$JDK_HOME" -a -x "$JDK_HOME/bin/java" ]; then
  JDK="$JDK_HOME"
elif [ -n "$JAVA_HOME" -a -x "$JAVA_HOME/bin/java" ]; then
  JDK="$JAVA_HOME"
else
  JAVA_BIN_PATH=`which java`
  if [ -n "$JAVA_BIN_PATH" ]; then
    if [ "$OS_TYPE" = "FreeBSD" -o "$OS_TYPE" = "MidnightBSD" ]; then
      JAVA_LOCATION=`JAVAVM_DRYRUN=yes java | "$GREP" ‘^JAVA_HOME‘ | "$CUT" -c11-`
      if [ -x "$JAVA_LOCATION/bin/java" ]; then
        JDK="$JAVA_LOCATION"
      fi
    elif [ "$OS_TYPE" = "SunOS" ]; then
      JAVA_LOCATION="/usr/jdk/latest"
      if [ -x "$JAVA_LOCATION/bin/java" ]; then
        JDK="$JAVA_LOCATION"
      fi
    elif [ "$OS_TYPE" = "Darwin" ]; then
      JAVA_LOCATION=`/usr/libexec/java_home`
      if [ -x "$JAVA_LOCATION/bin/java" ]; then
        JDK="$JAVA_LOCATION"
      fi
    fi

    if [ -z "$JDK" -a -x "$READLINK" -a -x "$XARGS" -a -x "$DIRNAME" ]; then
      JAVA_LOCATION=`"$READLINK" -f "$JAVA_BIN_PATH"`
      case "$JAVA_LOCATION" in
        */jre/bin/java)
          JAVA_LOCATION=`echo "$JAVA_LOCATION" | "$XARGS" "$DIRNAME" | "$XARGS" "$DIRNAME" | "$XARGS" "$DIRNAME"`
          if [ ! -d "$JAVA_LOCATION/bin" ]; then
            JAVA_LOCATION="$JAVA_LOCATION/jre"
          fi
          ;;
        *)
          JAVA_LOCATION=`echo "$JAVA_LOCATION" | "$XARGS" "$DIRNAME" | "$XARGS" "$DIRNAME"`
          ;;
      esac
      if [ -x "$JAVA_LOCATION/bin/java" ]; then
        JDK="$JAVA_LOCATION"
      fi
    fi
  fi
fi

if [

-z "$JDK"

 ]; then
  message

"No JDK found. Please validate either PYCHARM_JDK, JDK_HOME or JAVA_HOME environment variable points to valid JDK installation."


  exit 1
fi

说明没有找到JDK location path。需要安装并配置JDK了。

3. 安装JDK

首先查了一下Ubuntu12.04是否支持JDK8，发现还是支持的。那就放心安装吧。

参照【3】的方法，通过设置源仓库的方式安装。（如果想手动安装，请参考【5】【6】）

Important: This PPA supports Ubuntu 14.04, 13.10, 12.04 and 10.04 as well as the corresponding Linux Mint versions. Ubuntu 13.04 and 12.10 are no longer supported by Canonical

（1）返回到Home目录：“~”，然后依次执行一下几条command

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

安装过程中会跳出Oracle license对话框，选择接受就是了。

（2）安装完成后，运行"java -version"或者"javac -version"查看是否安装成功。如果得到类似如下的输出，表明安装成功了。

$ java -version
java version "1.8.0_20"
Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
Java HotSpot(TM) 64-Bit Server VM (build 25.20-b23, mixed mode)
$ javac -version
javac 1.8.0_20

（3）在【3】中说道，如果想automatically set up the Java 8 environment variables，可以使用下面的command：

sudo apt-get install oracle-java8-set-default

我使用该command后，在Terminal中运行 echo $JAVA_HOME，没有任何输出。看来是没起什么作用。有可能是在一开始配置完repository后，安装时使用该条命令，可以以后尝试一下。

由于一些程序在运行时可能默认需要 $JAVA_HOME 环境变量，因此还是需要设置一下环境变量的。

4. 配置$JAVA_HOME 环境变量

参考【4】中 Setting the "JAVA_HOME" environment variable 一节进行设置。

（1）Find out the path of your Java installation:

sudo update-alternatives --config java

它将返回类似如下的结果，列出了本机所安装的所有Java运行时环境JRE。（共有2个：JDK7和OpenJDK6，0和2是同一个，auto mode和manual mode的差别）

There are 2 choices for the alternative java (providing /usr/bin/java).

Selection    Path                                            Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-7-oracle/jre/bin/java          1062      auto mode
  1            /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java   1061      manual mode
  2            /usr/lib/jvm/java-7-oracle/jre/bin/java          1062      manual mode

Press enter to keep the current choice[*], or type selection number:

对应的各个JRE的安装路径分别为：

0. /usr/lib/jvm/java-7-oracle

1. /usr/lib/jvm/java-6-openjdk-amd64

2. /usr/lib/jvm/java-7-oracle

在我本机执行 sudo update-alternatives --config java 的结果为：

Selection    Path                                     Priority   Status
------------------------------------------------------------
  0            /usr/lib/jvm/java-8-oracle/jre/bin/java   1         auto mode
* 1            /usr/lib/jvm/java-8-oracle/jre/bin/java   1         manual mode

Press enter to keep the current choice[*], or type selection number:

可见只安装了一个Java环境： JDK8。它对应的安装路径为：

/usr/lib/jvm/java-8-oracle

（2）编辑/etc/environment文件