patch context

add context of show package version.
muink · Mar 3, 2016 · 65b1abd · 65b1abd
1 parent 9206e59
commit 65b1abd
Showing 1 changed file with 21 additions and 13 deletions.
diff --git a/04.package-management.md b/04.package-management.md
@@ -120,45 +120,53 @@
 1. 搜尋 (毋需管理者權限)。
 
   # Debian/Ubuntu
-  aptitude search  <package_name>
+  aptitude search <package_name>
   apt-cache search <package_name>
-  dpkg -l | grep  <package_name>
+  dpkg -l | grep <package_name>
 
   # CentOS/RHEL
-  yum search <package_name>
-  rpm -qa | grep <package_name>
+  yum search <package_name>
+  rpm -qa | grep <package_name>
 
 2. 安裝。
 
   # Debian/Ubuntu
   sudo aptitude install <package_name>
-  sudo apt-get install  <package_name>
-  sudo dpkg -i  <package_name>
+  sudo apt-get install <package_name>
+  sudo dpkg -i <package_name>
 
   # CentOS/RHEL
-  sudo yum install <package_name>
-  sudo rpm -ivh  <package_name>
+  sudo yum install<package_name>
+  sudo rpm -ivh <package_name>
 
 3. 升級。
 
   # Debian/Ubuntu
   sudo aptitude upgrade <package_name>
-  sudo apt-get upgrade  <package_name>
+  sudo apt-get upgrade <package_name>
 
   # CentOS/RHEL
   sudo yum update <package_name>
   sudo rpm -Uvh <package_name>
 
 4. 移除。
 
-   # Debian/Ubuntu
+  # Debian/Ubuntu
   sudo aptitude remove <package_name>
-  sudo apt-get remove  <package_name>
-  sudo dpkg -r  <package_name>
+  sudo apt-get remove <package_name>
+  sudo dpkg -r <package_name>
 
   # CentOS/RHEL
   sudo yum remove <package_name>
-  sudo rpm -e <package_name>
+  sudo rpm -e <package_name>
+  
+5. 版本查詢。
+
+  # Debian/Ubuntu
+  dpkg-query -W <package_name>
+
+  # CentOS/RHEL
+  rpm -q <package_name>
 
 話說套件管理的指令也不算少，凍仁強烈建議大家使用 aptitude 及 yum 來管理套件，其最棒的是它們會自行處理套件間的相依性，可減輕不少負擔。至於參數的部份，請先牢記 search, install, update, upgrade 和 remove。相信到這裡我們已可完成大部份的事情了。