diff --git a/src/fr/devinsy/unix/EtcGroupFile.java b/src/fr/devinsy/unix/EtcGroupFile.java
index b72a319..1cca125 100644
--- a/src/fr/devinsy/unix/EtcGroupFile.java
+++ b/src/fr/devinsy/unix/EtcGroupFile.java
@@ -144,10 +144,8 @@ public class EtcGroupFile extends ChangeableFile
 		return result;
 	}
 
-	/**
-	 * This method returns the updated groups.
-	 * 
-	 * @return the groups
+	/* (non-Javadoc)
+	 * @see fr.devinsy.unix.util.ChangeableFile#refresh()
 	 */
 	@Override
 	public void refresh()
diff --git a/src/fr/devinsy/unix/EtcPasswdFile.java b/src/fr/devinsy/unix/EtcPasswdFile.java
index ab4e75c..3156c1c 100644
--- a/src/fr/devinsy/unix/EtcPasswdFile.java
+++ b/src/fr/devinsy/unix/EtcPasswdFile.java
@@ -99,10 +99,8 @@ public class EtcPasswdFile extends ChangeableFile
 		return result;
 	}
 
-	/**
-	 * Updated users.
-	 * 
-	 * @return the users
+	/* (non-Javadoc)
+	 * @see fr.devinsy.unix.util.ChangeableFile#refresh()
 	 */
 	@Override
 	public void refresh()
diff --git a/src/fr/devinsy/unix/Group.java b/src/fr/devinsy/unix/Group.java
index f0fe588..ba573cb 100644
--- a/src/fr/devinsy/unix/Group.java
+++ b/src/fr/devinsy/unix/Group.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2010,2013-2014,2017-2018 Christian Pierre MOMON
+ * Copyright (C) 2006-2021 Christian Pierre MOMON
  * 
  * This file is part of Devinsy-unix.
  * 
@@ -23,7 +23,6 @@ import java.util.Vector;
 /**
  * The Class Group.
  * 
- * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
 public class Group
 {
@@ -89,7 +88,9 @@ public class Group
 	}
 
 	/**
+	 * Gets the members.
 	 *
+	 * @return the members
 	 */
 	public Vector<String> getMembers()
 	{
@@ -102,7 +103,9 @@ public class Group
 	}
 
 	/**
+	 * Gets the name.
 	 *
+	 * @return the name
 	 */
 	public String getName()
 	{
@@ -115,7 +118,9 @@ public class Group
 	}
 
 	/**
+	 * Gets the password.
 	 *
+	 * @return the password
 	 */
 	public String getPassword()
 	{
@@ -128,7 +133,9 @@ public class Group
 	}
 
 	/**
+	 * Gid.
 	 *
+	 * @return the int
 	 */
 	public int gid()
 	{
@@ -141,7 +148,9 @@ public class Group
 	}
 
 	/**
+	 * Members.
 	 *
+	 * @return the vector
 	 */
 	public Vector<String> members()
 	{
@@ -154,7 +163,9 @@ public class Group
 	}
 
 	/**
+	 * Name.
 	 *
+	 * @return the string
 	 */
 	public String name()
 	{
@@ -167,7 +178,9 @@ public class Group
 	}
 
 	/**
+	 * Passwd.
 	 *
+	 * @return the string
 	 */
 	public String passwd()
 	{
@@ -180,7 +193,10 @@ public class Group
 	}
 
 	/**
+	 * Sets the gid.
 	 *
+	 * @param gid
+	 *            the new gid
 	 */
 	public void setGid(final int gid)
 	{
@@ -188,7 +204,10 @@ public class Group
 	}
 
 	/**
+	 * Sets the name.
 	 *
+	 * @param name
+	 *            the new name
 	 */
 	public void setName(final String name)
 	{
@@ -196,7 +215,10 @@ public class Group
 	}
 
 	/**
+	 * Sets the passwd.
 	 *
+	 * @param password
+	 *            the new passwd
 	 */
 	public void setPasswd(final String password)
 	{
@@ -204,7 +226,10 @@ public class Group
 	}
 
 	/**
+	 * Sets the password.
 	 *
+	 * @param password
+	 *            the new password
 	 */
 	public void setPassword(final String password)
 	{
@@ -225,5 +250,3 @@ public class Group
 		return result;
 	}
 }
-
-// ////////////////////////////////////////////////////////////////////////
\ No newline at end of file
diff --git a/src/fr/devinsy/unix/Groups.java b/src/fr/devinsy/unix/Groups.java
index 9e62a79..f4c04b2 100644
--- a/src/fr/devinsy/unix/Groups.java
+++ b/src/fr/devinsy/unix/Groups.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2010,2013-2014,2017-2018 Christian Pierre MOMON
+ * Copyright (C) 2006-2021 Christian Pierre MOMON
  * 
  * This file is part of Devinsy-unix.
  * 
@@ -24,11 +24,9 @@ import java.util.Vector;
 /**
  * The Class Groups.
  * 
- * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
 public class Groups extends Vector<Group>
 {
-
 	private static final long serialVersionUID = 5802487312198869603L;
 
 	// static private final Logger logger =
@@ -91,7 +89,11 @@ public class Groups extends Vector<Group>
 	}
 
 	/**
+	 * Gets the by gid.
 	 *
+	 * @param gid
+	 *            the gid
+	 * @return the by gid
 	 */
 	public Group getByGid(final int gid)
 	{
@@ -250,5 +252,3 @@ public class Groups extends Vector<Group>
 		return result;
 	}
 }
-
-// ////////////////////////////////////////////////////////////////////////
\ No newline at end of file
diff --git a/src/fr/devinsy/unix/Unix.java b/src/fr/devinsy/unix/Unix.java
index 1bc372b..30cf544 100644
--- a/src/fr/devinsy/unix/Unix.java
+++ b/src/fr/devinsy/unix/Unix.java
@@ -35,7 +35,6 @@ import fr.devinsy.unix.acl.AclManager;
 /**
  * The Class Unix.
  * 
- * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
 public class Unix
 {
@@ -51,8 +50,8 @@ public class Unix
 	 *            the text
 	 * @param path
 	 *            the path
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void appendToFile(final String text, final String path) throws UnixException
 	{
@@ -99,6 +98,15 @@ public class Unix
 		return result;
 	}
 
+	/**
+	 * Bash.
+	 *
+	 * @param command
+	 *            the command
+	 * @return the string
+	 * @throws CmdExecException
+	 *             the cmd exec exception
+	 */
 	public static String bash(final String... command) throws CmdExecException
 	{
 		String result;
@@ -118,13 +126,13 @@ public class Unix
 
 	/**
 	 * Chmod.
-	 * 
+	 *
 	 * @param changes
 	 *            the changes
 	 * @param path
 	 *            the path
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void chmod(final String changes, final String path) throws UnixException
 	{
@@ -152,13 +160,13 @@ public class Unix
 
 	/**
 	 * Clear acl.
-	 * 
+	 *
 	 * @param id
 	 *            the id
 	 * @param filePathName
 	 *            the file path name
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void clearAcl(final String id, final String filePathName) throws UnixException
 	{
@@ -167,13 +175,13 @@ public class Unix
 
 	/**
 	 * Clear acl group.
-	 * 
+	 *
 	 * @param group
 	 *            the group
 	 * @param filePathName
 	 *            the file path name
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void clearAclGroup(final String group, final String filePathName) throws UnixException
 	{
@@ -182,13 +190,13 @@ public class Unix
 
 	/**
 	 * Clear acl user.
-	 * 
+	 *
 	 * @param login
 	 *            the login
 	 * @param filePathName
 	 *            the file path name
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void clearAclUser(final String login, final String filePathName) throws UnixException
 	{
@@ -197,11 +205,11 @@ public class Unix
 
 	/**
 	 * Creates the user account.
-	 * 
+	 *
 	 * @param login
 	 *            the login
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void createUserAccount(final String login) throws UnixException
 	{
@@ -217,13 +225,13 @@ public class Unix
 
 	/**
 	 * Creates the user account.
-	 * 
+	 *
 	 * @param login
 	 *            the login
 	 * @param name
 	 *            the name
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void createUserAccount(final String login, final String name) throws UnixException
 	{
@@ -243,15 +251,15 @@ public class Unix
 
 	/**
 	 * Creates the user account.
-	 * 
+	 *
 	 * @param login
 	 *            the login
 	 * @param name
 	 *            the name
 	 * @param home
 	 *            the home
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void createUserAccount(final String login, final String name, final String home) throws UnixException
 	{
@@ -286,7 +294,7 @@ public class Unix
 
 	/**
 	 * Creates the user account.
-	 * 
+	 *
 	 * @param login
 	 *            the login
 	 * @param name
@@ -295,8 +303,8 @@ public class Unix
 	 *            the home
 	 * @param password
 	 *            the password
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void createUserAccount(final String login, final String name, final String home, final String password) throws UnixException
 	{
@@ -317,11 +325,11 @@ public class Unix
 
 	/**
 	 * Delete group.
-	 * 
+	 *
 	 * @param group
 	 *            the group
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void deleteGroup(final String group) throws UnixException
 	{
@@ -346,7 +354,12 @@ public class Unix
 	}
 
 	/**
+	 * Delete user account.
 	 *
+	 * @param login
+	 *            the login
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void deleteUserAccount(final String login) throws UnixException
 	{
@@ -398,12 +411,12 @@ public class Unix
 
 	/**
 	 * Gets the acl data.
-	 * 
+	 *
 	 * @param filePathName
 	 *            the file path name
 	 * @return the acl data
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static String getAclData(final String filePathName) throws UnixException
 	{
@@ -417,12 +430,12 @@ public class Unix
 
 	/**
 	 * Gets the acl users.
-	 * 
+	 *
 	 * @param filePathName
 	 *            the file path name
 	 * @return the acl users
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static String[] getAclUsers(final String filePathName) throws UnixException
 	{
@@ -472,13 +485,13 @@ public class Unix
 
 	/**
 	 * Link.
-	 * 
+	 *
 	 * @param sourcePath
 	 *            the source path
 	 * @param targetPath
 	 *            the target path
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void link(final String sourcePath, final String targetPath) throws UnixException
 	{
@@ -517,15 +530,15 @@ public class Unix
 
 	/**
 	 * Modify login.
-	 * 
+	 *
 	 * @param sourceLogin
 	 *            the source login
 	 * @param targetLogin
 	 *            the target login
 	 * @param sourceHomeDirectory
 	 *            the source home directory
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void modifyLogin(final String sourceLogin, final String targetLogin, final String sourceHomeDirectory) throws UnixException
 	{
@@ -596,13 +609,13 @@ public class Unix
 
 	/**
 	 * Recursive chmod.
-	 * 
+	 *
 	 * @param changes
 	 *            the changes
 	 * @param path
 	 *            the path
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void recursiveChmod(final String changes, final String path) throws UnixException
 	{
@@ -725,11 +738,11 @@ public class Unix
 
 	/**
 	 * Sets the facl.
-	 * 
+	 *
 	 * @param args
 	 *            the new facl
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void setfacl(final String... args) throws UnixException
 	{
@@ -782,12 +795,13 @@ public class Unix
 
 	/**
 	 * chfn [ -f full-name ] [ username ].
-	 * 
+	 *
 	 * @param login
 	 *            the login
 	 * @param newRealName
 	 *            the new real name
 	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static void setRealName(final String login, final String newRealName) throws UnixException
 	{
diff --git a/src/fr/devinsy/unix/User.java b/src/fr/devinsy/unix/User.java
index 32e8d76..e8bec8a 100644
--- a/src/fr/devinsy/unix/User.java
+++ b/src/fr/devinsy/unix/User.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2010,2013-2014,2017-2018 Christian Pierre MOMON
+ * Copyright (C) 2006-2021 Christian Pierre MOMON
  * 
  * This file is part of Devinsy-unix.
  * 
@@ -21,7 +21,6 @@ package fr.devinsy.unix;
 /**
  * The Class User.
  * 
- * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
 public class User
 {
@@ -409,5 +408,3 @@ public class User
 		return result;
 	}
 }
-
-// ////////////////////////////////////////////////////////////////////////
\ No newline at end of file
diff --git a/src/fr/devinsy/unix/Users.java b/src/fr/devinsy/unix/Users.java
index e0a4f32..897205f 100644
--- a/src/fr/devinsy/unix/Users.java
+++ b/src/fr/devinsy/unix/Users.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2010,2013-2014,2017-2018 Christian Pierre MOMON
+ * Copyright (C) 2006-2021 Christian Pierre MOMON
  * 
  * This file is part of Devinsy-unix.
  * 
@@ -24,7 +24,6 @@ import java.util.Vector;
 /**
  * The Class Users.
  * 
- * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
 public class Users extends Vector<User>
 {
@@ -41,8 +40,12 @@ public class Users extends Vector<User>
 		super();
 	}
 
-	/* (non-Javadoc)
-	 * @see java.util.Vector#addAll(java.util.Collection)
+	/**
+	 * Adds the all.
+	 *
+	 * @param source
+	 *            the source
+	 * @return true, if successful
 	 */
 	public boolean addAll(final Users source)
 	{
@@ -212,5 +215,3 @@ public class Users extends Vector<User>
 		return result;
 	}
 }
-
-// ////////////////////////////////////////////////////////////////////////
\ No newline at end of file
diff --git a/src/fr/devinsy/unix/acl/AclManager.java b/src/fr/devinsy/unix/acl/AclManager.java
index c01ea5d..5a0e99c 100644
--- a/src/fr/devinsy/unix/acl/AclManager.java
+++ b/src/fr/devinsy/unix/acl/AclManager.java
@@ -113,11 +113,12 @@ public class AclManager
 
 	/**
 	 * Gets the acl.
-	 * 
+	 *
 	 * @param filePathName
 	 *            the file path name
 	 * @return the acl
 	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static Acl getAcl(final String filePathName) throws UnixException
 	{
@@ -215,10 +216,12 @@ public class AclManager
 
 	/**
 	 * Gets the ACL data.
-	 * 
+	 *
 	 * @param filePathName
 	 *            the file path name
 	 * @return the acl data
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static String getAclData(final String filePathName) throws UnixException
 	{
@@ -288,7 +291,7 @@ public class AclManager
 
 	/**
 	 * Checks if is used.
-	 * 
+	 *
 	 * @param type
 	 *            the type
 	 * @param id
@@ -299,8 +302,7 @@ public class AclManager
 	 *            the depth
 	 * @return true, if is used
 	 * @throws UnixException
-	 * @throws Exception
-	 *             the exception
+	 *             the unix exception
 	 */
 	public static boolean isUsed(final AclEntry.Type type, final String id, final String filePathName, final int depth) throws UnixException
 	{
@@ -341,7 +343,7 @@ public class AclManager
 
 	/**
 	 * Checks if is used.
-	 * 
+	 *
 	 * @param type
 	 *            the type
 	 * @param id
@@ -354,6 +356,7 @@ public class AclManager
 	 *            the depth
 	 * @return true, if is used
 	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static boolean isUsed(final AclEntry.Type type, final String id, final String filePath, final String[] filePathNames, final int depth) throws UnixException
 	{
@@ -411,7 +414,7 @@ public class AclManager
 
 	/**
 	 * Checks if is used.
-	 * 
+	 *
 	 * @param id
 	 *            the id
 	 * @param filePathName
@@ -419,8 +422,8 @@ public class AclManager
 	 * @param depth
 	 *            the depth
 	 * @return true, if is used
-	 * @throws Exception
-	 *             the exception
+	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static boolean isUsed(final String id, final String filePathName, final int depth) throws UnixException
 	{
@@ -461,7 +464,7 @@ public class AclManager
 
 	/**
 	 * Checks if is used.
-	 * 
+	 *
 	 * @param id
 	 *            the id
 	 * @param filePathNames
@@ -470,6 +473,7 @@ public class AclManager
 	 *            the depth
 	 * @return true, if is used
 	 * @throws UnixException
+	 *             the unix exception
 	 */
 	public static boolean isUsed(final String id, final String[] filePathNames, final int depth) throws UnixException
 	{
diff --git a/src/fr/devinsy/unix/linux/Linux.java b/src/fr/devinsy/unix/linux/Linux.java
index 5fc6c28..60b7712 100644
--- a/src/fr/devinsy/unix/linux/Linux.java
+++ b/src/fr/devinsy/unix/linux/Linux.java
@@ -36,7 +36,6 @@ import fr.devinsy.unix.util.PropertyList;
 /**
  * The Class Linux.
  * 
- * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
 public class Linux
 {
@@ -208,6 +207,7 @@ public class Linux
 	 * 
 	 * @return the string
 	 * @throws IOException
+	 *             Signals that an I/O exception has occurred.
 	 */
 	public static String readProcCpuinfo0() throws IOException
 	{
@@ -265,6 +265,7 @@ public class Linux
 	 * 
 	 * @return the string
 	 * @throws IOException
+	 *             Signals that an I/O exception has occurred.
 	 */
 	public static String readProcUptimeFile() throws IOException
 	{
diff --git a/src/fr/devinsy/unix/util/ChangeableFile.java b/src/fr/devinsy/unix/util/ChangeableFile.java
index b0a884d..07fd9a8 100644
--- a/src/fr/devinsy/unix/util/ChangeableFile.java
+++ b/src/fr/devinsy/unix/util/ChangeableFile.java
@@ -21,11 +21,8 @@ package fr.devinsy.unix.util;
 import java.io.File;
 
 /**
- * The Class CachedFile.
- * 
- * @author Christian Pierre MOMON <christian.momon@devinsy.fr>
+ * The Class ChangeableFile.
  */
-
 public class ChangeableFile
 {
 	private File sourceFile;
diff --git a/src/fr/devinsy/unix/util/Property.java b/src/fr/devinsy/unix/util/Property.java
index e6febb1..53dc435 100644
--- a/src/fr/devinsy/unix/util/Property.java
+++ b/src/fr/devinsy/unix/util/Property.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2017-2018 Christian Pierre MOMON
+ * Copyright (C) 2017-2021 Christian Pierre MOMON
  * 
  * This file is part of Devinsy-unix.
  * 
@@ -28,6 +28,11 @@ public class Property
 
 	/**
 	 * Utility class has not to have a constructor.
+	 *
+	 * @param name
+	 *            the name
+	 * @param value
+	 *            the value
 	 */
 	public Property(final String name, final String value)
 	{
@@ -35,21 +40,43 @@ public class Property
 		this.value = value;
 	}
 
+	/**
+	 * Gets the name.
+	 *
+	 * @return the name
+	 */
 	public String getName()
 	{
 		return this.name;
 	}
 
+	/**
+	 * Gets the value.
+	 *
+	 * @return the value
+	 */
 	public String getValue()
 	{
 		return this.value;
 	}
 
+	/**
+	 * Sets the name.
+	 *
+	 * @param name
+	 *            the new name
+	 */
 	public void setName(final String name)
 	{
 		this.name = name;
 	}
 
+	/**
+	 * Sets the value.
+	 *
+	 * @param value
+	 *            the new value
+	 */
 	public void setValue(final String value)
 	{
 		this.value = value;