i write a file name usertest as follows, #!/bin/sh cnt=`ps -elf | grep usertest | grep -v grep | wc -l` echo $cnt every time i run it, the number it shows bigger that 2. but if i change the file into #!/bin/sh ps -elf | grep usertest | grep -v grep | wc -l it just show ONE line. i try the same process in IRIX, it works well. i do not know why!!! VCD5元,DVD10元 百元数码相机荟萃展卖 加入书友会获精美礼品