Answer Posted / sricharan

touch:
It can be used to create 0 byte empty file.
syntax: touch filename.txt
we can create multiple file using touch command.
syntax: touch file1.txt file2.txt file3.txt ..... filen.txt
touch commnad is also used to update time stamp
Syntax:touch filename

cat:
It can be use to view the file.
Syntax:cat filename
It can be use to append the existing file.
syntax: cat >> filename
It can be use to concatinate n number of files to one file.
syntax: cat file1 file2 file3 file4 >> newfile
cat is also used to create a file
syntax: cat filename

What is the size of time_t?

1219

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What is awk used for?

1134

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Describe the zip/unzip command using gzip.

1160

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How can you see the command line history?

1143

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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:

2272

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What does #!/ Bin sh do?

1068

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Is ‘du’ a command? If so, what is its use?

1155

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What is used to type command?

1064

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Which unix command lists files/folders in alphabetical order?

1764

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What is ‘ps’ command for?

1187

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What is unix command?

1265

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What is the use of finger command?

1219

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Which unix command to make a new directory?

1152

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What is the use of find command in unix?

1155

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Why is it called a shebang?

1188

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