Chapter 8Files and User Information Utilities

Logical Partitions

referred to as file systems

like a drive in windows world

$ df (display filesystems) shows your logical partitions

most common are/usr, where binary and executables are stored

/opt, where third party applications are usually located

root (/), where the files that pertain to the operation of the system are kept

Finding Files

-name filename

-type filetype

-mtime [+|-]n

-atime [+|-]n

-user loginid

-group groupid

-perm mode

-size [+|-]n[c]

Finding Files

Finding Files

grep Command

search for pattern "rose” inside of text file “flowers”

$ grep rose flowers

looks for who is on server by piping who output to pattern search for user2

$ who | grep user2

CDE Finding Files

much like find on other GUI systems

specify where you want to search

what you want to search for

criteria much the same as with command line - "content" criteria is like grep command

Sorting

who Command

who by default displays information about all users currently logged on the local system

lists user’s name, terminal, login time, elapsed time since the last activity on the terminal line, and the machine (host) name

who -H prints headers above the info

who -q only lists users currently logged on and the total number

Switching Users

su (switch user) username switches to another user but doesn't change directory location

if you're root, you don't need the password

su - takes you into the user's environment - system reads new user's initialization files

as administrator, you can experience trouble AS the user to help troubleshoot

User ID

Real User ID (RUID) - initial loginEffective User ID (EUID) - who you are after the switchwho am i (only unix command with spaces in it) displays RUID with login info - if switched, still displays real user IDwhoami displays only the login name of the EFFECTIVE userid displays the effective user nameid -a identifies the effective user name, user ID, and user’s groups

Lab 8.2.4 – File Processing Commands (find, grep, sort)

Lab 8.3.3 – User Identification Commands

chapter 8 assessment

Labs/Assessment

1. find any files in your home directory named dante:

Chap 8 Exercises

1. find any files in your home directory named dante:

$ find . -name dante./dante

$ find ~/ -name dante/export/home/user2/dante

Chap 8 Exercises

2. look in this file: /etc/passwd for user2 home directory info

Chap 8 Exercises

2. look in this file: /etc/passwd for user2 home directory info

$ grep user2 /etc/passwduser2:x:1001:10::/export/home/user2:/bin/ksh

Chap 8 Exercises

3. sort the output of the long listing of your home directory

Chap 8 Exercises

3. sort the output of the long listing of your home directory

$ ls -l | sort

Chap 8 Exercises