Answer Posted / pavithra

Using sed command:

sed 's/searchword/replaceword/g' filename --[It finds the
word in file and replaces and displays in the command line]

sed -i '/s/searchword/replaceword/g' filename -- [It edits
the file, finds and replaces the word and saves it and next
time when u open the file it displays the file with replaced
word]

What does the command ' $who | sort –logfile > newfile' do?

1285

---

What is in grep command?

1181

---

What does this command do? Cat food 1 > kitty

1599

---

How do I use grep to find a file?

1123

---

What does 'mkdir' command do in UNIX?

1322

---

What are awk commands?

1174

---

How can we use grep command in unix?

1222

---

Which unix command to make a new directory?

1158

---

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

1167

---

What is command substitution?

1390

---

Explain the terms ‘system calls’ and ‘library functions’ with respect to unix commands?

1225

---

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

1093

---

When i run a programm of orphan process. Instead of getting child's parent (ppid)=1 ..i get 1400 and it varies as per system. How can i findthe right soluion??? My pgm: #include # include int main() { int pid; pid=fork(); if(pid < 0) {exit(-1);} else if(pid==0) { printf("Child Process is Sleeping ..."); sleep(10); printf("Orphan Child's Parent ID : %u ",getppid()); } else { printf("Parent Process Completed ... %u ",getpid()); exit(0); } return 0; } Output:

2278

---

What will the following command do?

1132

---

Explain command to display different lines that are found when compare two files?

1188

---