#!/bin/shfilesize=`ls-lnohup.out|awk'{print$5}'`echo"`date+%Y-%m-%d_%H:%M:%S`fileSize:$filesizebit">>clearNohup.logif[$filesize-gt1073741824]thenecho"`date+%Y-%m-%d_%H:%M:%S`$filesizebiggerthan1G,wewillbackupandclear...">>clearNohup.logcp-fnohup.outnohup.out.bak>nohup.outecho"`date+%Y-%m-%d_%H:%M:%S`filebackupandclaerover!">>clearNohup.logelseecho"`date+%Y-%m-%d_%H:%M:%S`$filesizelessthan1G,donothing!">>clearNohup.logfi手動執行時候沒有報錯，正常執行；在crontab執行時候一直在報錯.系統是centOS6報錯:clearNohup.sh:line4:[:-gt:unaryoperatorexpected求大神指點！