Answer Posted / jagadeeb choudhury

Cron: is a daemond process its run periodical.Mince you can
run it in every (sec,min,hour,day,date,Month).We can't
remove a cron job we commenting that only.
here 6 fild to schedule a cron job.

At: only run on particular time specifies by user who
schedule that time you can remove a at job.

Ex:-
$at 9:30
>a.txt
>b.txt
[ctl+d]



Thanks,
Jagadeeb@gmail.com

Name the unix command to find how many days the server has been up.

1114

---

What is the difference between grep and grep?

1065

---

Which command is used to kill the last background job?

1292

---

What are the dos commands?

1198

---

Name the various commands that are used for the user information in unix.

1023

---

Explain ‘library functions’ with respect to unix commands?

1114

---

What is rmdir command?

1049

---

How do I clear my terminal history?

1093

---

How do I use nslookup?

1037

---

What is awk used for?

1079

---

What is grep in bash?

1012

---

What does #!/ Bin sh do?

1020

---

What is the use of the tee command?

1056

---

Is there a way to erase all files in the current directory, including all its sub-directories, using only one command?

1339

---

Write a command to display a file’s contents in various formats?

1155

---