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nixhome-config.sh

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+#!/bin/bash
+
+NIXHOME0=/faronear/sysconfig/nixhome
+NIXHOME1=/faronear/npm/sysconfig/nixhome
+NIXHOME2=~/faronear/npm/sysconfig/nixhome
+NIXHOME3=~/faronear/npm.git/sysconfig/nixhome
+NIXHOME4=~/faronear.git/npm.git/sysconfig/nixhome
+NIXHOME5=`pwd`/nixhome
+
+if [ "$1" ]
+then
+  NIXHOME=$1
+elif [ -d $NIXHOME0 ]
+then
+  NIXHOME=$NIXHOME0
+elif [ -d $NIXHOME1 ]
+then 
+  NIXHOME=$NIXHOME1
+elif [ -d $NIXHOME2 ]
+then
+  NIXHOME=$NIXHOME2
+elif [ -d $NIXHOME3 ]
+then
+  NIXHOME=$NIXHOME3
+elif [ -d $NIXHOME4 ]
+then
+  NIXHOME=$NIXHOME4
+elif [ -d $NIXHOME5 ]
+then
+  NIXHOME=$NIXHOME5
+else
+  echo ××× none of the testing path is valid.
+  echo "=== Enter [nixhome path] or leave [blank] to exit"
+  read -p ">>> " NIXHOME
+  echo ""
+  if [ ! -d "$NIXHOME" ]
+  then 
+    echo "××× nixhome path [$NIXHOME] not available! Exit now. ×××"
+    exit
+  fi
+fi
+
+# $2 应当为用户名
+if [ "$2" == 'root' ]
+then
+  HomePath=/root
+  TheUser=root
+elif [ "$2" ]
+then
+  HomePath=/home/$2
+  TheUser=$2
+else
+  # 可能是 root 或其他
+  HomePath=~
+  TheUser=`whoami`
+fi
+
+if [ -d "$HomePath" ]
+then
+
+  pushd $HomePath
+  
+  homescriptlist=".emacs .emacs.lisp .bashrc .bash_profile .gitignore"
+  echo
+  echo "=== Copy or link scripts? <l> to link, <c> to copy, <anything else> to omit:"
+  read -p ">>> " CopyOrLinkScripts
+  if [ "$CopyOrLinkScripts" == 'l' ]
+  then
+    for homescript in $homescriptlist
+    do
+      if [ -e "$homescript" ] || [ -L "$homescript" ]
+      then
+        mv $homescript $homescript.backup-$(date +%Y%m%dT%H%M%S)
+      fi
+      echo "--- Linking $NIXHOME/$homescript to $HomePath/$homescript ..."
+      ln -s $NIXHOME/$homescript ./
+    done
+  elif [ "$CopyOrLinkScripts" == 'c' ]
+  then
+    for homescript in $homescriptlist
+    do
+      if [ -e "$homescript" ]
+      then
+        mv $homescript $homescript.backup-$(date +%Y%m%dT%H%M%S)
+      fi
+      echo "--- Copying $NIXHOME/$homescript to $HomePath/$homescript ..."
+      cp -r $NIXHOME/$homescript ./
+    done
+  else
+    echo '--- Home scripts not changed.'
+  fi
+
+  echo
+
+  if [ "$(uname)" == "Darwin" ]
+  then
+    echo '--- No need to run this script on Mac OS X. Exit now.'
+  elif [ "$TheUser" != 'root' ]  # 仅允许 non-root 用户进行远程密钥登录
+  then
+
+    mkdir -p $HomePath/.ssh
+    chmod 700 $HomePath/.ssh
+    if [ "$2" ]
+    then
+      # 由 root 指定新用户而创建的配置文件的 owner 是 root，而不是新用户，导致新用户无法读取该文件而密钥登录失败，因此要重设 owner。
+      chown $TheUser:$TheUser $HomePath/.ssh
+    fi
+    if [ -e "$HomePath/.ssh/authorized_keys" ]
+    then
+      mv $HomePath/.ssh/authorized_keys $HomePath/.ssh/authorized_keys.backup-$(date +%Y%m%dT%H%M%S)
+    fi
+
+    echo "=== Append or link or omit [$HomePath/.ssh/authorized_keys] to config ssh server? <a> for append, <l> for link, <anything else> for omit:"
+    read -p ">>> " CopyOrLinkOrOmitAuthorizedKeys
+
+    if [ "$CopyOrLinkOrOmitAuthorizedKeys" = 'l' ]
+    then
+      echo "--- Linking $NIXHOME/authorized_keys to $HomePath/.ssh/authorized_keys ..."
+      ln -s $NIXHOME/.ssh/authorized_keys $HomePath/.ssh/authorized_keys
+      sudo chmod 644 $HomePath/.ssh/authorized_keys # 确保其他用户能读取 nixhome/.ssh/authorized_keys
+    elif [ "$CopyOrLinkOrOmitAuthorizedKeys" = 'a' ]
+    then
+      echo "--- Copying $NIXHOME/authorized_keys to $HomePath/.ssh/authorized_keys ..."
+      cat $NIXHOME/.ssh/authorized_keys >> $HomePath/.ssh/authorized_keys
+      chmod 600 $HomePath/.ssh/authorized_keys
+    fi
+    echo
+
+  fi
+
+  popd
+  
+else
+  echo "!!! Not existing $HomePath, please try again."
+fi