Exercice 1)
ls -R --full-time TR/
ls -lR --time-style=full-iso TR/

Exercice 2)
ls -d TR/lib/krb5/*5[4-9]*  TR/lib/krb5/*6[0-7]* TR/lib/kernel/*5[4-9]* TR/lib/kernel/*6[0-7]*

Exercice 3)
find TR/ -mindepth 6 -newer TR/lib/krb5/plugins/inout.dev

Exercice 4)
find TR/ -mindepth 8 -maxdepth 8 -type d -exec mkdir '{}'/NEW \;

Exercice 5)
find TR/ -mindepth 8 -maxdepth 8 -execdir tar cvf archive.tar '{}' +

Exercice 6)
Voir utf8tocode.sh