# "i" key - enters insert mode# "ESC" key - switch to command mode# In command mode:wq# save and quit:q!# force quit without savedd# delete entire lined5# delete next 5 linesu# undoA# jump to end of line and switch to insert mode0# jump to start of the line$# jump to end of the line10G# jump to line 10/<string> # search for stringn# jump to next matchN# search in opposite direction:%s/old/new# replace 'old' with 'new' throughout the file