title: running a make command for John the Ripper in ubuntu 15.04
body: <p>I am a newbie to Linux and ubuntu, but i am trying to install John the Ripper on a new server running ubuntu 15.04. i have it downloaded using:</p>
  
  <pre><code>wget http://www.openwall.com/john/j/john-1.8.0.tar.xz
  </code></pre>
  
  <p>then i unpacked it with:</p>
  
  <pre><code>tar -xzvf john-1.8.0.tar.gz
  </code></pre>
  
  <p>then, i cd into the src directory as per the instructions and run:</p>
  
  <pre><code>sudo make clean linux-x86-64
  </code></pre>
  
  <p>and this error is being returned (and i am trying to figure out what it means/ how to fix it)</p>
  
  <pre><code>rm -f ../run/john ../run/unshadow ../run/unafs ../run/unique
  ../run/john.bin ../run/john.com ../run/unshadow.com ../run/unafs.com 
  ../run/unique.com ../run/john.exe ../run/unshadow.exe ../run/unafs.exe 
  ../run/unique.exe
  rm -f ../run/john.exe john-macosx-* *.o *.bak core
  rm -f detect bench generic.h arch.h tmp.s
  cp /dev/null Makefile.dep
  ln -sf x86-64.h arch.h
  make ../run/john ../run/unshadow ../run/unafs ../run/unique \
  JOHN_OBJS="DES_fmt.o DES_std.o DES_bs.o DES_bs_b.o BSDI_fmt.o MD5_fmt.o 
  MD5_std.o BF_fmt.o BF_std.o AFS_fmt.o LM_fmt.o trip_fmt.o dummy.o  
  batch.o bench.o charset.o common.o compiler.o config.o cracker.o 
  crc32.o external.o formats.o getopt.o idle.o inc.o john.o list.o 
  loader.o logger.o math.o memory.o misc.o options.o params.o path.o 
  recovery.o rpp.o rules.o signals.o single.o status.o tty.o wordlist.o 
  unshadow.o unafs.o unique.o c3_fmt.o x86-64.o" \
  CFLAGS="-c -Wall -Wdeclaration-after-statement -O2 -fomit-frame-pointer  
  -DHAVE_CRYPT" \
  LDFLAGS="-s  -lcrypt"
  make[1]: Entering directory '/home/mike/john-1.8.0/src'
  gcc -c -Wall -Wdeclaration-after-statement -O2 -fomit-frame-pointer  -  
  DHAVE_CRYPT -funroll-loops DES_fmt.c
  make[1]: gcc: Command not found
  Makefile:896: recipe for target 'DES_fmt.o' failed
  make[1]: *** [DES_fmt.o] Error 127
  make[1]: Leaving directory '/home/mike/john-1.8.0/src'
  Makefile:183: recipe for target 'linux-x86-64' failed
  make: *** [linux-x86-64] Error 2
  </code></pre>