List of my Linux basic problems.
LINUX
LUBUNTU HOW TO COMPILE AND INSTALL FROM SOURCE CODE
1. Run $ ./configure // nothing happend
2. Run $ make to compile // no makefile found
3. Create build directory and move there $ mkdir build $$ cd build
4. Type from build directory $ cmake .. // compiled with some errores like CMAKE_CXX_COMPILER-NOTFOUND
5. G++ was not installed. I installed it $ sudo apt install g++
Linux apt-get couldn’t find a package
1. If your linux is old You have to change repositories etc/apt/sources.list
2. You have to change this file to new one with new links to repository.
HOW TO BACKUP LUNUX LUBUNTU
1. Use DejaDup $ sudo apt install deja-dup –classic // But it is suit for some folders not for all system backup
2. $ sudo apt install timestart // There is no on lubuntu repository
3. Just copy all folder /var/cache/apt/archives/
4. then install them manualy $ sudo dpkg -i *.deb
CentOS RHEL 8 GUI GRAPHICAL INTERFACE DOESN’T WORK
1. To check if GUI is installed or not type $ ls /usr/bin/*session
2. Try to install with # dnf groupinstall "Server with GUI" -y
UBUNTU commands overview
1. To check ubuntu version type:
$ lsb_release -a It is also saved in etc/issue
2. If you want to move at the root catalog in file manager just type:
CTRL+L you will see at the top highlighted path. Type just / then ENTER. / is the root catalog.
3. All programs are in catalog /bin
4. User’s programs are in /opt catalog
5. To make file writable use:
$ sudo chmod +rwx file.txt
6. tldr command is very usefull, It shows examples of usage:
$ tldr chmod or chmod 644 file.txt first number 6 is a owner right
7. If you unable to copy file in folder in Ubuntu
Check directory permission $ ls -l folder/
To grant permission $ sudo chmod -R 777 directory/
$ sudo -s enable root mode
Networking Linux command
1. $ route // Shows routing table
2. $ netstat // Shows connections
HOW TO GET IP ADDRESS FROM URL IN UBUNTU LINUX
1. Use dig command
2. Use nslookup
ON START LINUX UBUNTU FREEZES AND DOESN’T REACT ON MOUSE OR KEYBOARD
1. Boot with SHIFT button to advanced menu → recovery mode. Some module is failed.
2. Drop to root shell prompt.
3. Previously I’ve changed repositories. So I turn it back. # nano /etc/apt/sources.lisf
4. Change focal back to bionic. # apt update && apt upgrade // got error Failed to restart udev.service
5. Boot with CD → rescue broken system // doesn’t help
6. Recovery mode → update GRUB // doesn’t help
7. Reinstall system
LUBUNTU KEY COMBO TO SWITCH LANGUAGE
1.
MANJARO
1. Install browser chromium
sudo pacman -Syu
sudo pacman -S chromium
2. Install snap-store // $ sudo pacman -S snapd then use gui add-remove software
3. How to clean hard disk to get free space.
3.1` To check disc space $ df
3.2 Remove unwanted .pkg files from /var/cache/pacman/pkg/ or $ pacman -Scc
3.3 How to do pacman autoremove // pacman -Qdtq
3.4. Limit journal $ sudo journalctl --vacuum-size=50M
4. Manjaro doesn't starts. Restore manjaro fix boot errors.
4.2. Press ESC on start to enter GRUB.
4.2.1. Run test memory. // No
4.2.2. Type E to edit GRUB parameters. To load in safe mode without display manager add a 3 to the options at the end of the line (and optionally remove ‘quiet’) so it appears like this:
linux /boot/vmlinuz-4.11-x86_64 root=UUID=0a01099a-1e33-489a-a2de-10104e8492f5 rw 3 type F10 // Nothing
4.2.3. Boot from livecd and use manjaro-chroot -a and update everything # pacman -Syu
KALI
1. KALI doesn't boot up. I got
/dev/mapper/k--vg-root contains a file system with errors, check forced.
Inodes that were part of a corrupted orphan linked list found.
/dev/mapper/k--vg-root: EXPECTED INCONSISTENCY; RUN fsck MANUALLY.
(i.e. without -a or -p options)
fsck exited with status code 4
The root filesystem on /dev/mapper/k--vg-root requires a manual fsck
BusyBox v1.36.1 (Debian 1:1.36.1-3.1+b1) built in shell (ash)
(initrampfs)
1.1. Try to run $ fsck -y /dev/sda1 ; reboot -f to fix disk errors. If this problem will repeat in future again maybe your HDD going to broke. // I got fsck from util-linux thats all
1.2. My bad. I have not sda1 corrupted but /mapper/k--vg-root try $ fsck -y /dev/mapper/k--vg-root // HELPED
2. How to clear garbage and old archives. // sudo apt-get autoclean
2.1 How to clear garbage and old archives. // sudo apt-get autoremove
2.2 sudo apt clean
FEDORA
1. How to clean system space. // dnf system-upgrade clean
1.1. dnf clean packages
1.2. dnf autoremove
1.3. Delete old kernel // dnf remove $(dnf repoquery --installonly --latest-limit=-2 -q)