Zdravstvuite. Proshu prosheniya za translit i za vozmoznyi offtopic, no che-to ya ne znayu kuda takoi vopros posylat.
Imeetsa fail test.txt. Naprimer takoi: a b a b a c Teper esli sdelat tail -f test.txt | grep a poluchaem output: a b a b a c A esli sdelat tail -f test.txt | sed -e "s/a/a/" | grep a to nikakogo outputa ne prihodit. Pochemu? Spasibo, Konstantin.