Chapter 8 Files 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

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 login Effective User ID (EUID) - who you are after the switch who am i (only unix command with spaces in it) displays RUID with login info - if switched, still displays real user ID whoami displays only the login name of the EFFECTIVE user id displays the effective user name id -a identifies the effective user name, user ID, and user’s groups

Lab – File Processing Commands (find, grep, sort) Lab – 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/passwd user2: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