How do I grep multiple patterns in unix?
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What does $? Mean in unix?
What is difference between unix and windows?
Explain how do you create special files like named pipes and device files?
What is a unix shell?
What are the requirements for a swapper to work?
What does unix like mean?
What is hardlink and softlink in unix?
What is a regular file in unix?
Name the data structure used to maintain file identification?
Differentiate relative path from an absolute path?
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.
Explain the importance of directories in a unix system