Usefull Unix Commands

• Find all source files and replace neu where you have alt
  • find . -iname '*.cxx' -exec sed 's/alt/neu/g' -i "{}" ";"
• Find all source files and search for string suche in this files. Print out filename
  • find . -iname '*.cxx' -exec grep -iH suche "{}" ";"

• Find compile flags which are active by default
  • gcc -march=native -Q --help=target -v
• Show all defined preprocessor macros for a specific compiler
  • echo | gcc -E -dM -
  • gcc -dM -E - < /dev/null
  • clang -dM -E -x c /dev/null

• Monitor CPU usage and Memory
  • top -b -p | tee
  • grep | cut -c 42-46 [CPU usage]
  • grep | cut -c 47-52 [Memory]

• iostat, vmstat, sar ???