Expert C Programming reading

1. Both operands are pointers to qualified or unqualified versions of compatible types, and the type pointed to by the left has all the qualifiers of the type pointed to by the right. 

char * cp;
const char *ccp;
ccp = cp;

cp = ccp; /* results in a compilation warning */

2.The one "l" NUL ends an ASCII string, The two "l" NULL points to no thing. 

arch linux on IBM X61

https://wiki.archlinux.org/index.php/IBM_ThinkPad_X60s

Recursively delete .svn directories

find . -name ".svn" -exec rm -rf {} \;

source: stackoverflow.com  theandystratton.com