makefile in its own dir

aptitude.sh

@@ -233,20 +233,25 @@
 
 ##get new package info
 
-    apt-cache depends $PKG
-        #list package dependencies
+    #list package dependencies
 
-    sudo apt-get build-dep $PKG
-        #? what is the difference between this and depends
+        apt-cache depends $PKG
 
-    sudo apt-rdepends -r $PKG
-        #who depends on $PKG: reverse dependencies
+    #? what is the difference between this and depends
 
-    apt-cache show $PKG
-        #basic information about a package
+        sudo apt-get build-dep $PKG
 
-    apt-cache showpkg $PKG
-        #detailed information about a package
+    #find who depends on $PKG (reverse dependencies):
+
+        sudo apt-rdepends -r $PKG
+
+    #get basic information about a package:
+
+        apt-cache show $PKG
+
+    #get detailed information about a package:
+
+        apt-cache showpkg $PKG
 
     sudo aptitude install debtags
     debtags tag ls $PKG
@@ -258,16 +263,26 @@
 
 ##install
 
-    sudo aptitude install $PKG
     #install package
 
-    sudo aptitude install -o APT::Install-Recommends="true" $PKGg
+        sudo aptitude install $PKG
+
     #also installs recommended packages
+
+        sudo aptitude install -o APT::Install-Recommends="true" $PKGg
+
     #-o option changes things which could be in the config files.
 
-    sudo aptitude install -o APT::Install-Suggests="true" $PKGg
     #also installs suggested packages
 
+        sudo aptitude install -o APT::Install-Suggests="true" $PKGg
+
+    #install only the dependencies required for a package but not the package itself:
+
+        sudo aptitude build-dep $PKG
+
+    #this is useful if you want to dev a package that has compiled dependencies
+
 ##upgrade installed packages
 
     #upgrade a single package

linux.sh

@@ -6771,28 +6771,14 @@ int main(void)
             assert test -d "$d"
             rm -r "$d"
                 #dir instead of file
-    
+
     ##pathchk
-    
+
         #check if path is portable across posix systems
-        
+
         pathchk -p 'a'
         pathchk -p '\'
 
-    ##dirs
-
-        #move between dirs in stack
-
-        dirs
-            #show dir stack
-            # -v : verbose. one per line, with line numbers
-
-        pushd .
-            #push to dir stack
-
-        popd
-            #pop fro dir stack and cd to it
-
     ##fdupes
 
         #fine command line tool for eliminating byte by byte duplicates

make/interpreter/makefile

@@ -0,0 +1,18 @@
+#make uses `$SHELL` var (makefile var) to determine the interpreter to use
+
+#remember:
+
+#- each rule line means one separated shell invocation
+#- lines ending in `\`  get following line appended and are passed together to the interpreter
+	#**with** the `\`
+
+#default: sh
+
+SHELL := /usr/bin/python
+
+0:
+	print 1
+
+1:
+	#a = 1
+	#print a