Exam (elaborations)
RHCSA Exam | Questions And Answers Latest {} A+ Graded | 100% Verified
- Course
- Institution
RHCSA Exam | Questions And Answers Latest {} A+ Graded | 100% Verified
[Show more]
Content preview
RHCSA Exam | Questions And Answers Latest {2024- 2025} A+ Graded | 100% VerifiedRepeat last command - !!
Repeat last argument in current command - !$
Kernel log message command - dmesg
File usage - du -hsx
h - human, s - summarize,
x - single fs
Umount a busy drive - kill -9 'lsof +D /mnt/cdrom'
(list open files, +D=directory and contents)
Compare file contents - diff
Search for all gzip files, not dirs - find -type f -name *.gz
Command to tell crond what to do - crontab
crontab order - Min, hour, date, month, day, command
Show what's in crond - crontab -l
Turn on firewall for run levels 2-5 - chkconfig iptables on
Check if <cmd> is running - service <cmd> status <=old
,systemctl status <cmd> <=new
Set tasks for crond - crontab -e
e = edit
Mail location - /var/spool/mail
Command to check messages - mail
Check <cmd> run level schedule - chkconfig --list <cmd>
Print a file's number of lines - wc -I <file>
l=line
User account commands - useradd, userdel, usermod
usermod switches - G second group, g main group, u user ID num, d home, s shell
Set user password - passwd --stdin <user>
Delete user account AND home dir - userdel -r
r = remove
Force user password change - chage -d 0 <user>
change + age
-d = last day
Group-file field categories - /etc/group gname:x:gid:users
,User account lock cmd - usermod -L or -U <usr>
U = unlock
Check if user account is locked - less /etc/passwd
user:! means locked
:!! means no password set
Show password parameters - chage -l <login>
l = list
Set password max life - chage -M <# of days>
Firewall settings GUI - system-config-firewall
Scan for open ports - netstat -tulpn (as root)
nmap 192.168.1.10
tu=tcp/udp, l=only listening, p=sh pid, n=numeric address
Yum repo location - /etc/yum.repos.d
Turn <cmd> on for important run levels - chkconfig <cmd> on
cmd to see if crond is running - ps -ef | grep crond
e=every process, f=ASCII process hierarchy
or
service crond status <=old
systemctl status crond <=new
start crond - service crond start <=old
, systemctl start crond <=new
turn <cmd> on for important run levels - chkconfig <cmd> on
check what levels <cmd> is set to run at - chkconfig --list <cmd>
cmd to set instructions for crond - crontab -e
script comment symbol - #
crontab format - min hr date month day command
what day number is Sunday - zero
cmd to get crontab help - man 5 crontab
cmd to view email - mail
where are emails stored - /var/spool/mail
show list of crond tasks - crontab -l
be careful of this when creating crond tasks - the created task will run as the user you are logged in as
cmd for disk usage - du -hsx
h - human, s - summarize, x - single fs
cmd to find all open instances of cdrom - lsof +D /dev/cdrom
list open files, +D is for all instances and included files
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller oneclass. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.48. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now