File handling examples

insert lines behind a certain line:   sed -i '/Ini_N/ a\ eee /Ini_N/ a\ sss ' "Config_DPCM.ini~"            replacing a line including 'foo':   sed -i 's/^.*foo.*$/another string/' myfile.txt           replacing a line:   sed -i "s/Ini_T=5./Ini_T=2./g" `find ./ -name Config_DPCM.ini`            Remove empty lines with sed   s            find string in a certain type of files using grep   find   .    -name   "*.txt"   -print     grep -r --include=*.m "versions" ./     name only:     Compare two directories diff -r --exclude="*.yuv" ML-My-Planck MMSE-My-Planck