Ubuntu中文论坛

代码： 全选

for i in `who`;do write `awk '{print $1, $2}'` <<< hi; done

代码： 全选

sudo -s
for i in `who|awk '{print $1$2}'|sed s/tty/_tty/`;do write `echo $i|awk -F '_' '{print $1,$2}'` <<<hello\! ;done

代码： 全选

who | awk '{print $1, $2}' | while read line; do write "$line" <<< hi ; done

代码： 全选

happy everyday ~$ who | awk '{print $1, $2}' | while read line; do write "$line" <<< hi ; done
write: catigger pts/0 is not logged in
write: unicode1985 pts/1 is not logged in
write: chenkai036 pts/2 is not logged in
write: wangjiangb pts/3 is not logged in
write: kevinqcs pts/4 is not logged in
write: hellojinjie pts/5 is not logged in
write: zhys9 pts/6 is not logged in
write: asiasoft pts/7 is not logged in
write: wshcdr pts/8 is not logged in
write: unmisha pts/9 is not logged in
write: mybays pts/10 is not logged in
write: warmbupt pts/11 is not logged in
write: Flameshark pts/12 is not logged in
write: davechenww pts/13 is not logged in
write: yongjh pts/14 is not logged in
write: joecgs pts/15 is not logged in
write: jeff613 pts/21 is not logged in
write: spectre pts/22 is not logged in
write: yindajun pts/23 is not logged in

代码： 全选

happy everyday ~$ who | awk '{print $1, $2}' | while read line; do eval write "$line" <<< hi ; done