on “sed” command
EmpData(Sample Database)
1122|j.b. saxena |g.m. |account |12/12/52|6000
2233|n.k. gupta |d.g.m |sales |31/12/40|9000
4545|anil agarwal |director |account |06/07/47|7500
5656|lalit choudhury |executive|marketing|07/09/50|5000
1265|chanchal singhvi|g.m. |admin |12/09/63|6000
0110|shyam saksena |chairman |marketing|12/12/43|8000
5566|jai sharma |director |account |23/12/89|7000
7733|jayant |d.g.m |sales |29/02/70|6000
1. From the above database substitute the delimiter of first
3 lines with “ : “
2. From the above database substitute the delimiter with “ : ”
3. Insert the string “ XYZ Employees” in the first line.
4. Store the lines pertaining to the directors, d.g.m and
g.m into three separate files.
5. Using address store first 4 lines into a file Empupdate.
6. Find the pattern “account” in the database and replaces
that with “accounts”.
7. Select those lines which do not have a pattern “g.m”.
8. Insert a blank line after every line in the database.
- 1 Answers
- 3183 Views
- I also Faced
- E-Mail Answers
Answer / Prem Sagar
To perform these tasks using the sed command, you can chain several commands together as follows:n
1. Replace the first three lines' delimiter with " by executing `sed -i '3,5s/: /:/g' EmpData`. This command selects lines 3 to 5 and replaces all instances of : with : using the sed replace command (-s) in-place (-i).n
2. Replace the delimiter with " by executing `sed -i 's/://g' EmpData`.n
3. Insert "XYZ Employees" at the beginning of the file using `sed -i '1i "XYZ Employees"' EmpData`. The i option inserts a new line before the specified one (line 1).n
4. To store lines pertaining to directors, d.g.m, and g.m into separate files, you can use `sed -n '/director/,/g.m/p' EmpData > director.txt` for directors, `sed -n '/d.g.m/,/g.m/p' EmpData > dgm.txt`, and `sed -n '/g.m/,/g.m/p' EmpData > gm.txt`. These commands select the lines containing 'director' or 'd.g.m' or 'g.m' and print them (p) using sed.n
5. To store the first 4 lines into a file called Empupdate, you can use `sed -n '1,4p' EmpData > Empupdate`. This command selects and prints lines 1 to 4.n
6. Replace "account" with "accounts" using `sed -i 's/account/accounts/g' EmpData`.n
7. Select those lines which do not have a pattern "g.m" using `grep -v 'g.m' EmpData`. The grep command prints only lines that do not match the specified pattern (-v).n
8. Insert a blank line after every line in the database using `sed '/./{n$a n}' EmpData > newEmpData`. This command selects every line (/) with a dot (.) and inserts a newline ($) after each line (a) to create a blank line before printing (>). The resulting file will be called newEmpData.
| Is This Answer Correct ? | 0 Yes | 0 No |
Is powershell a bash?
What language is shell scripting?
What is path in shell script?
What is meant by $1 in shell script?
What is sed in shell script?
Hi All, Is it possible to create one file name only space or space in file name in UNIX and we can able to run that on Unix?
What does it mean to debug a script?
c program which behaves like a shell(command interpreter). it has its own prompt say "NewShell$".any normal shell command is executed from your shell by starting a child process to execute a system program corrosponding to the command
What is k shell?
What is a shell environment?
What is the difference between a 'thread' and a 'process'?
How to take input values from the user?
ASP 
