diff --git a/argentum.cfg b/argentum.cfg
index 2ad87c4..51b863d 100644
--- a/argentum.cfg
+++ b/argentum.cfg
@@ -1,7 +1,7 @@
 local agcfg = {
   ["halyde"] = {
     ["maindir"] = "",
-    ["version"] = "1.3.1",
+    ["version"] = "1.4.0",
     ["description"] = "A universal, customizable and feature-packed operating system for OpenComputers.",
     ["directories"] = {
       "halyde/apps",
diff --git a/argentum/store/halyde/package.cfg b/argentum/store/halyde/package.cfg
index 1adeb39..e39a67d 100644
--- a/argentum/store/halyde/package.cfg
+++ b/argentum/store/halyde/package.cfg
@@ -4,7 +4,7 @@ Ahalyde/core/
 Ahalyde/config/
 Ahalyde/apps/helpdb/
 Ahalyde/apps/
-V1.3.0
+V1.4.0
 Ainit.lua
 Ahalyde/apps/helpdb/cat.txt
 Ahalyde/apps/helpdb/cd.txt
@@ -43,4 +43,4 @@ Ahalyde/core/termlib.lua
 Ahalyde/lib/component.lua
 Ahalyde/lib/event.lua
 Ahalyde/lib/filesystem.lua
-Ahalyde/lib/raster.lua
\ No newline at end of file
+Ahalyde/lib/raster.lua
diff --git a/halyde/apps/cat.lua b/halyde/apps/cat.lua
index a1884fc..d59f28b 100644
--- a/halyde/apps/cat.lua
+++ b/halyde/apps/cat.lua
@@ -1,20 +1,20 @@
-local args = {...}
-local file = args[1]
-args = nil
+local files = {...}
 local fs = import("filesystem")
-if not file then
+if not files or not files[1] then
   shell.run("help cat")
   return
 end
-if file:sub(1, 1) ~= "/" then
-  file = shell.workingDirectory .. file
+for _, file in ipairs(files) do 
+  if file:sub(1, 1) ~= "/" then
+    file = fs.concat(shell.workingDirectory, file)
+  end
+  if not fs.exists(file) then
+    print("\27[91mFile does not exist.")
+  end
+  local handle = fs.open(file, "r")
+  local data
+  repeat
+    data = handle:read(math.huge or math.maxinteger)
+    print(data, false)
+  until not data
 end
-if not fs.exists(file) then
-  print("\27[91mFile does not exist.")
-end
-local handle = fs.open(file, "r")
-local data
-repeat
-  data = handle:read(math.huge or math.maxinteger)
-  print(data, false)
-until not data
diff --git a/halyde/apps/cd.lua b/halyde/apps/cd.lua
index b91f0d7..72aee9e 100644
--- a/halyde/apps/cd.lua
+++ b/halyde/apps/cd.lua
@@ -1,29 +1,14 @@
-local args = {...}
-local directory = args[1]
-args = nil
+local directory = ...
 local fs = import("filesystem")
 
 if not directory then
   return
 end
-if directory == ".." then
-  local backDirectory = shell.workingDirectory:match("(.+)/.-/")
-  if backDirectory then
-    backDirectory = backDirectory .. "/"
-  else
-    backDirectory = "/"
-  end
-  shell.workingDirectory = backDirectory
+if directory:sub(1, 1) ~= "/" then
+  directory = fs.concat(shell.workingDirectory, directory)
+end
+if fs.exists(directory) and fs.isDirectory(directory) then
+  shell.workingDirectory = fs.canonical(directory)
 else
-  if directory:sub(-1, -1) ~= "/" then
-    directory = directory .. "/"
-  end
-  if directory:sub(1, 1) ~= "/" then
-    directory = shell.workingDirectory .. directory
-  end
-  if fs.exists(directory) and fs.isDirectory(directory) or fs.exists(shell.workingDirectory .. directory) and fs.isDirectory(shell.workingDirectory .. directory) then
-    shell.workingDirectory = directory
-  else
-    print("\27[91mNo such directory.")
-  end
+  print("\27[91mNo such directory.")
 end
diff --git a/halyde/apps/cp.lua b/halyde/apps/cp.lua
index adc6576..cf6a8ab 100644
--- a/halyde/apps/cp.lua
+++ b/halyde/apps/cp.lua
@@ -1,6 +1,4 @@
-local args = {...}
-local fromFile, toFile = args[1], args[2]
-args = nil
+local fromFile, toFile = ...
 local fs = import("filesystem")
 
 if not fromFile or not toFile then
@@ -8,10 +6,10 @@ if not fromFile or not toFile then
   return
 end
 if fromFile:sub(1, 1) ~= "/" then
-  fromFile = shell.workingDirectory .. fromFile
+  fromFile = fs.concat(shell.workingDirectory, fromFile)
 end
 if toFile:sub(1, 1) ~= "/" then
-  toFile = shell.workingDirectory .. toFile
+  toFile = fs.concat(shell.workingDirectory, toFile)
 end
 if fromFile == toFile then
   print("\27[91mSource and destination are the same.")
diff --git a/halyde/apps/helpdb/cat.txt b/halyde/apps/helpdb/cat.txt
index e6ce488..77fb305 100644
--- a/halyde/apps/helpdb/cat.txt
+++ b/halyde/apps/helpdb/cat.txt
@@ -1,8 +1,8 @@
-Usage: cat [FILE]
+Usage: cat [FILES]...
 Concatenates and prints a file.
 
-  FILE   Specifies the path to the file to print.
+  FILES   Specifies the paths to the files to print.
 
 Examples:
-  cat /init.lua   Concatenates and prints init.lua in the root directory.
-  cat help.lua    Concatenates and prints help.lua in the current working directory.
+  cat /init.lua           Concatenates and prints init.lua in the root directory.
+  cat help.lua cat.lua    Concatenates and prints help.lua and cat.lua in the current working directory.
diff --git a/halyde/apps/helpdb/cp.txt b/halyde/apps/helpdb/cp.txt
index e478126..842c747 100644
--- a/halyde/apps/helpdb/cp.txt
+++ b/halyde/apps/helpdb/cp.txt
@@ -1,9 +1,10 @@
 Usage: cp [FLAGS] [SOURCE] [DESTINATION]
 Copies a file.
 
-  -o, --overwrite   Allows any file that might be at the destination to be overwritten.
-  SOURCE        Specifies the file to be copied.
-  DESTINATION   Specifies the path to copy the file to.
+  FLAGS               Specifies extra options when executing the command.
+    -o, --overwrite   Allows any file that might be at the destination to be overwritten.
+  SOURCE              Specifies the file to be copied.
+  DESTINATION         Specifies the path to copy the file to.
 
 Examples:
   cp /home/a.txt /b.txt   Copies the file at /home/a.txt to /b.txt.
diff --git a/halyde/apps/helpdb/mv.txt b/halyde/apps/helpdb/mv.txt
index 59e0e31..900744f 100644
--- a/halyde/apps/helpdb/mv.txt
+++ b/halyde/apps/helpdb/mv.txt
@@ -1,9 +1,10 @@
 Usage: mv [FLAGS] [SOURCE] [DESTINATION]
 Moves/renames a file.
 
-  -o, --overwrite   Allows any file that might be at the destination to be overwritten.
-  SOURCE            Specifies the file to be moved/renamed.
-  DESTINATION       Specifies the path/filename to move/rename the file to.
+  FLAGS               Specifies extra options when executing the command.
+    -o, --overwrite   Allows any file that might be at the destination to be overwritten.
+  SOURCE              Specifies the file to be moved/renamed.
+  DESTINATION         Specifies the path/filename to move/rename the file to.
 
 Examples:
   mv /home/a.txt /b.txt   Moves the file at /home/a.txt to /b.txt.
diff --git a/halyde/apps/mkdir.lua b/halyde/apps/mkdir.lua
index b5ffb04..6f041fd 100644
--- a/halyde/apps/mkdir.lua
+++ b/halyde/apps/mkdir.lua
@@ -1,6 +1,4 @@
-local args = {...}
-local directory = args[1]
-args = nil
+local directory = ...
 local fs = import("filesystem")
 
 if not directory then
@@ -8,7 +6,7 @@ if not directory then
   return
 end
 if directory:sub(1, 1) ~= "/" then
-  directory = shell.workingDirectory .. directory
+  directory = fs.concat(shell.workingDirectory, directory)
 end
 if fs.exists(directory) then
   print("\27[91mAn object already exists at the specified path.")
diff --git a/halyde/apps/mv.lua b/halyde/apps/mv.lua
index 17c7f5a..8660759 100644
--- a/halyde/apps/mv.lua
+++ b/halyde/apps/mv.lua
@@ -1,6 +1,4 @@
-local args = {...}
-local fromFile, toFile = args[1], args[2]
-args = nil
+local fromFile, toFile = ...
 local fs = import("filesystem")
 
 if not fromFile or not toFile then
@@ -8,10 +6,10 @@ if not fromFile or not toFile then
   return
 end
 if fromFile:sub(1, 1) ~= "/" then
-  fromFile = shell.workingDirectory .. fromFile
+  fromFile = fs.concat(shell.workingDirectory, fromFile)
 end
 if toFile:sub(1, 1) ~= "/" then
-  toFile = shell.workingDirectory .. toFile
+  toFile = fs.concat(shell.workingDirectory, toFile)
 end
 if fromFile == toFile then
   print("\27[91mSource and destination are the same.")
diff --git a/halyde/apps/rm.lua b/halyde/apps/rm.lua
index 6c19ae0..f83b695 100644
--- a/halyde/apps/rm.lua
+++ b/halyde/apps/rm.lua
@@ -1,6 +1,4 @@
-local args = {...}
-local file = args[1]
-args = nil
+local file = ...
 local fs = import("filesystem")
 
 if not file then
@@ -8,9 +6,10 @@ if not file then
   return
 end
 if file:sub(1, 1) ~= "/" then
-  file = shell.workingDirectory .. file
+  file = fs.concat(shell.workingDirectory, file)
 end
 if not fs.exists(file) then
   print("\27[91mFile does not exist.")
+  return
 end
 fs.remove(file)
diff --git a/halyde/lib/filesystem.lua b/halyde/lib/filesystem.lua
index 1051058..c604ef7 100644
--- a/halyde/lib/filesystem.lua
+++ b/halyde/lib/filesystem.lua
@@ -9,29 +9,58 @@ end
 
 local filesystem = {}
 
-function filesystem.processPath(path) -- returns the address and absolute path of a filesystem path as well as sanitizing it
+function filesystem.canonical(path)
   checkArg(1, path, "string")
-  absPath = path:gsub("/+", "/")
+  local segList = {}
+  if path:sub(1, 1) ~= "/" then
+    path = "/" .. path
+  end
+  path = path:gsub("/+", "/")
+  for segment in path:gmatch("[^/]+") do
+    if segment == ".." and segList[1] then
+      table.remove(segList, #segList)
+    elseif segment ~= "." then
+      table.insert(segList, segment)
+    end
+  end
+  return "/" .. table.concat(segList, "/")
+end
+
+function filesystem.concat(path1, path2)
+  checkArg(1, path1, "string")
+  checkArg(2, path2, "string")
+  if path1:sub(-1, -1) == "/" then
+    path1 = path1:sub(1, -2)
+  end
+  if path2:sub(1, 1) ~= "/" then
+    path2 = "/" .. path2
+  end
+  return path1 .. path2
+end
+
+function filesystem.absolutePath(path) -- returns the address and absolute path of an object
+  checkArg(1, path, "string")
+  path = filesystem.canonical(path)
   local address = nil
-  if absPath:find("^/mnt/.../") then
+  if path:find("^/mnt/.../") then
      address = component.get(path:sub(6,8))
     if not address then
       address = computer.getBootAddress()
     else
-      absPath = absPath:sub(9)
+      path = path:sub(9)
     end
   else
     address = computer.getBootAddress()
   end
   if not address then
-    return nil, "no such device"
+    return nil, "no such component"
   end
-  return address, absPath
+  return address, path
 end
 
 function filesystem.exists(path) -- check if path exists
   checkArg(1, path, "string")
-  local address, absPath = filesystem.processPath(path)
+  local address, absPath = filesystem.absolutePath(path)
   if not address then
     return false
   end
@@ -47,7 +76,7 @@ function filesystem.open(path, mode) -- opens a file and returns its handle
   if not (mode == "r" or mode == "w" or mode == "rb" or mode == "wb") then
     return nil, "invalid handle type"
   end
-  local address, absPath = filesystem.processPath(path)
+  local address, absPath = filesystem.absolutePath(path)
   local handleArgs = {component.invoke(address, "open", absPath, mode)}
   local handle = handleArgs[1]
   if not handle then
@@ -81,7 +110,7 @@ function filesystem.list(path)
     end
     return returnTable
   else
-    local address, absPath = filesystem.processPath(path)
+    local address, absPath = filesystem.absolutePath(path)
     if not address then
       return false
     end
@@ -91,7 +120,7 @@ end
 
 function filesystem.size(path)
   checkArg(1, path, "string")
-  local address, absPath = filesystem.processPath(path)
+  local address, absPath = filesystem.absolutePath(path)
   if not address then
     return false
   end
@@ -100,7 +129,7 @@ end
 
 function filesystem.isDirectory(path)
   checkArg(1, path, "string")
-  local address, absPath = filesystem.processPath(path)
+  local address, absPath = filesystem.absolutePath(path)
   if not address then
     return false
   end
@@ -110,8 +139,8 @@ end
 function filesystem.rename(fromPath, toPath)
   checkArg(1, fromPath, "string")
   checkArg(2, toPath, "string")
-  local fromAddress, fromAbsPath = filesystem.processPath(fromPath)
-  local toAddress, toAbsPath = filesystem.processPath(toPath)
+  local fromAddress, fromAbsPath = filesystem.absolutePath(fromPath)
+  local toAddress, toAbsPath = filesystem.absolutePath(toPath)
   if not fromAddress or not toAddress then
     return false
   end
@@ -135,8 +164,8 @@ end
 function filesystem.copy(fromPath, toPath)
   checkArg(1, fromPath, "string")
   checkArg(2, toPath, "string")
-  local fromAddress, fromAbsPath = filesystem.processPath(fromPath)
-  local toAddress, toAbsPath = filesystem.processPath(toPath)
+  local fromAddress, fromAbsPath = filesystem.absolutePath(fromPath)
+  local toAddress, toAbsPath = filesystem.absolutePath(toPath)
   if not fromAddress or not toAddress then
     return false
   end
@@ -154,7 +183,7 @@ end
 
 function filesystem.isDirectory(path)
   checkArg(1, path, "string")
-  local address, absPath = filesystem.processPath(path)
+  local address, absPath = filesystem.absolutePath(path)
   if not address then
     return false
   end
@@ -163,7 +192,7 @@ end
 
 function filesystem.remove(path)
   checkArg(1, path, "string")
-  local address, absPath = filesystem.processPath(path)
+  local address, absPath = filesystem.absolutePath(path)
   if not address then
     return false
   end
@@ -172,7 +201,7 @@ end
 
 function filesystem.makeDirectory(path)
   checkArg(1, path, "string")
-  local address, absPath = filesystem.processPath(path)
+  local address, absPath = filesystem.absolutePath(path)
   if not address then
     return false
   end