Question

Objective:
The objective of this lab is to work with files of UNIX file system.

Procedure:
1. OpenyourUnixshellandtrythesecommands:

Ø Create a new file and add some text in it v cat > filename

• Ø View a file
  v cat /etc/passwd v more /etc/passwd v more filename

• Ø Copy file1 ,making file2 v cp file1 file2

• Ø Rename file1 as file2 v mv file1 file2

• Ø Delete file1 as file2 vrm file

//Deletefile
// Double-check first

v rm -i file
Ø Counts the lines, words, characters in file

vwc file
Ø Search file for a string

v grep Andrw /etc/passwd v grep ’printf(’ hobby.c
v grep ^loca /usr/dict/words

// List lines containing ‘Andrw’ in /etc/passwd

//Lines containing ‘printf(‘ in hobby.c

//Lines starting with ‘loca’ in /usr/dict/words

1

• Ø Output can be redirected to a file with’>’ v ls > dir.txt
  v cal 1997 > year1997

• Ø Output can be appended to a file with ’>>’ v cal 1997 > years
  v cal 1998 >> years

• Ø Concatenate two files v cat f1 f2 > fs

• Ø Input redirection (less common) uses ‘<‘ v wc < years

• Ø Combine input and output redirection v wc < years > year-counts

0. Do screenshot of each steps you have completed.

Answer 1

root@tryit-renewing:-# touch file1 root@tryit-renewing:-.# 1s file file1 root@tryit-renewing:-# cat-file1 hello everyone... file1 . . . . root@tryit-renewing : N# root@tryit-renewing:-# cat file1 hello everyone... I am file! root@tryit-renewing:-#

www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin ackup:x:34:34:backup:/var/backups:/usr/sbin/nologin list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin irc : х: 39:39: ircd: /var/run/ircd:/usr/sbin/nologin gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin systemd-network:x:100:182:systemd Network Management,,, :/run/systemd/netif:/usr/sbin/nologin systemd-resolve:x:101:103:systemd Resolver,,,:/run/systemd/resolve:/usr/sbin/nologin syslog:x:182:106::/home/syslog:/usr/sbin/nologin messagebus:x:103:107::/nonexistent:/usr/sbin/nologin apt:x:104:65534::/nonexistent:/usr/sbin/nologin ubuntu:x:1800:1000: :/home/ubuntu:/bin/bash insmasq:x:105:65534:dnsmasq,,,:/var/lib/misc:/usr/sbin/nologin 1xd:x:999:999::/var/lib/1xd:/bin/sh root@tryit-renewing:-# 1

root@tryit-renewing:- # touch file2 root@tryit-renewing:-.# cp filel file2 root@tryit-renewing:-# cat file2 hello everyone... I am file! root@tryit-renewing :N# root@tryit-renewing:-.# mv file1 file2 root@tryit-renewing:-# 1s file file2 root@tryit-renewing:-# vrm file1 bash: vrm: command not found root@tryit-renewing:-.# rn file! bash: rn: command not found root@tryit-renewing:-.# rm file1 rm: cannot remove 'file1' No such file or root@tryit-renewing : ~# 1 directory