CSCI $4760/5760$ Assignment $1$

Submission: Take screen shots $($using Windows Snipping Tools to cut and paste into a Word

document$)$ to show the commands and results clearly. DO NOT print the whole screen.

Name the document as YourLastName$\_$Assign$1.$ If not specified, each question is $10$ pts$.$

Use tar and bzip$2$ to create a compressed archive of the $/$etc$/$sysconfig directory. Store the

archive under $/$tmp as etc.tar.bz$2.$

Search for all files in the entire directory structure that have been modified in the past $30$

days and save the file listing in the $\frac{?}{va}\frac{r}{t}m\frac{p}{?}$ modfiles.txt file.

$(20$pts$)$ Create user accounts called user$10,$ user$20,$ and user$30.$ Set their passwords to

user$10,$ user$20,$ and user$30($same as user name$).$ Make accounts for user$30$ to expire on

December $31,2024.$

Create user $40$ with UID $1040(-u),$ home directory $/$usr$/$user $40(-d),$ and shell $\frac{?}{bi}\frac{n}{s}h(-s).$

Create a group called group $10$ and add users user $20$ and user $30$ as secondary members.

Perform a case$-$insensitive search for all lines in the $/$etc$/$passwd file that begin with the

pattern "user". Then search for the pattern "nologin" in the passwd file and exclude $(-$v$)$

the lines in the output that contain this pattern.

Create file lnfile$1$ under $\frac{?}{tmp}$ and create one hard link $\frac{?}{tm}\frac{p}{lnfile2}$ and one soft link

$/$boot$/$file$1.$ Edit lnfile$1$ using the links and confirm.

$(20$pts$)$ Create a group called group $30$ with GID $3000,$ and add user $30$ and user $40$ to this

group. Create a directory called $/$sdata$,$ enable setgid bit on it$,$ and add write permission

bit for the group. Set ownership and owning group to root and group$30.$ Create a file

called file $1$ under $/$sdata as user user$30$ and modify the file as user $40$ Successfully.

$(20$pts$)$ Create directory $/$ dir$1$ with full permissions for everyone. Disallow non$-$owners to

remove files. Test by creating file $\frac{?}{tm}\frac{p}{d}ir\frac{11}{s}$tkfile$1$ as user$10$ and removing it as user

user$80.$