RHKN
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Set of flashcards Details
| Flashcards | 67 |
|---|---|
| Language | Deutsch |
| Category | Technology |
| Level | Other |
| Created / Updated | 03.02.2025 / 03.02.2025 |
| Weblink |
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SSH
ssh-keygen (key genereiren)
vi /etc/hosts (Eintrag des Servers)
ssh-copy-id <name vom hosts eintrag> (Public key zum zielserver kopieren)
Probleme mit /.autorelabel
mount -o remount,rw /
rm -rf /.autorelabel
restorecon -Rv /
Anzeige der konfigurieten Time date Settings
timedatectl status
Building Images from Containerfile
podman build -t i<magename> <pathContainerFile>
Anzeigen der defualt extends, set to 2M
vgdisplay
- -s 2M ond vgcreate
copy test.txt to every new useradd
cp text.txt /etc/skel
suche files ggrösser 200M und ls -d
find / -size +200M -type f -exec ls -l {} \;
but command sleep inifity with lowest prio in student auto start config
echo "nice -n 19 sleep infinity &" >> .bash_profile
Use systemd mount that is provided by default to mount the /tmp directory persistently using tmpfs driver (without fstab)
systemctl enable tmp.mount (wihtout --now)
create a simple systemd unit with sleep.service
- sleep 3600 command
- unit is stored in the appropriate location
- unit is automatically startet in mutil-user.target
if ist stops für any reasen it will automatically restart
cp /usr/lib/systemd/system/tuned.service /etc/systemd/system/sleep.service
vi:
- Description=Sleep3600
- Type=Simple
- ExecStart=/usr/bin/sleep 3600
- Restart=on-failure
-WantedBy=multi-user.target
Systemctl enable sleep.service
systemctl start sleep.service
checke deine registries fpr container
grep unqualified /etc/containers/registries.conf
Wo setzt man ein Label das man für fstab auch noch verwenden kann?
mkfs.xzz -L LABELNAME /dev/sda3
find all files and dir whicht is created by user natasha an copy it to /root/natashafiles
find / -user natasha -exec cp -rf {} /root/natashafiles/ \;
wo sollen lokale skripts platziert werden?
/usr/local/bin
Build applicatio rhcsa that m^orint message when logged in as ablerate user
vi /usr/local/bin/rhcsa
- #!/bin/bash
echo "Welcome etc"
paste /usr/local/bin/rhcsa in file in. /home/user/.bash_profile
Find all files with the name "passwd" and copy them into directory /mnt/copy
- sudo find / -name passwd -exec cp {} /mnt/copy \;
Find all files owned by the user "Rohit" and copy them in direcory /mnt/rohit
- sudo find / -user rohit -exec cp {} /mnt/rohit \;
The user owner should have all rights on directory "Dir"
- chmod u+x Dir (chmod 7xx DIR)
Create a compressed archieve of /etc directory and name it as /root/com.gz
- tar cvzf /root/com.gz /etc (mit Komprimierung)
Create a archieve of /etc directory and name it as /root/com.gz
- tar -cvf /root/com.gz /etc (ohne Komprimierung)
Copy the lines containing the word "root" in /etc/passwd and copy them into a file /mnt/pass
- grep "root" /etc/passwd >> /mnt/pass
Configure the repositories https://xyz.server.com/basos & https://xyz.server.com/appstream
- vi /etc/yum.repos.d/local.repo
[BaseOS]
name=baseOS
baseurl=https://xyz.server.com/baseos
enabled=1
gpgcheck=0
[AppStream]
name=AppStream
baseurl=https://xyz.server.com/appstrem
enabled=1
gpgcheck=0
Change tuned profile from virtual-guest to balanced
- dnf install tuned
- tuned-adm profile balanced
- tuned-adm active
Configure NTP server to run xyz.
- dnf install chrony
- vi /etc/crony.conf
- server <ip> iburst
- systemctl restart cronyd
- chronyc sources -v
- timedatectl
- timectl set-ntp true (falls es nicht true sist)
Create a group newgroup:
a) create a user harsh and make newgroup as secondary group
b) create a user nitin do not add to newggroup. nitin should have no login shell
c) assign al the above users password redhat
a) - groupadd newgroup
- useradd harsh -G newgroup
b) useradd nitin -s /sbin/nologin
c) passwd nitin/harsh
Copy the file /etc/fstab to /var/fstab
a) the user owner of /var/fstab should be root
b) the user natasha should have read and write access
c) the grou Mac should have no access
a) chwon root /var/fstab
b) useradd natashe & setafcl -m u:natasha:rw- /var/fstab
c) groupadd Mac
- setafcl -m g:Max:--- /var/fstab
Create a directoy /linux
a) Make the group owner to be Mac
b) Ensure that all files within /linus the grorup owner is Mac
c) Ensure that for all future files within /linux the group owner is Mac
d) Ensure that no user other that the user-owner of /linux is able to delet the content within /linux
a) - chown :Mac /linux
b) chwon -R :Mac linux
c) chmod g+s /linux
d) chmod +t /linux
LVM:
a) Create a LV named LV1 of size 8G
b) Extend the LV, LV1 by 2G
c) Create a LV named LV2 with 10 extend where each size is extend is 8Mb
a) - vgcreate VG1 /dev/sdX1
- lvcreate -name LV1 -L 8G VG1
- mount
b)- (vgextend LV1 /dev/sdX3)
- lvextend -r -L +2G /dev/VG1/LV1
c) vgcreate -s 8M VG2 /dev/sdX2
- lvcreate -name LV2 -l 10 /dev/
Create Filesystem from Stratis
- dnf install stratisd
- systemctl enable stratisd
- stratis pool create poolX /dev/sde
- stratis pool list
- stratis filesystem create poolX fsX
- stratis filesystem list
- vi /etc/fstab
- defaults,x-systemd.requires=stratisd.service
Execute the command /usr/local/bin/backup at 10:00a, on Feb 4. every yewr
- 0 10 4 2 * /user/local/bin/backup
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