Is unix os free?
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1)How to schedule a job,that will periodically execute in second by crontab? 2)I know only second specific time to execute the job. like 10 10 * * * sleep 40&&ps -l>/dev/pts/1 It will execute at 10:10:40 AM but do not know how to execute 15 second,30 second so on at 10:10 am.
briefly describe the shell's responsibilities?
Is unix os free?
What is unix mtime?
What are the file permissions and access modes in unix?
What is difference between unix and windows?
What is unix full form?
Explain what is inode?
What is the difference between soft link and hard link in Unix operating system ?
What are the layers of unix operating system?
How do I check disk space in unix?
Explain system bootup in unix.