Henry

The reason for the error “pg_config executable not found” is the missing library. The “libpq-dev” is not installed which can be resolved by installing “libpq-dev”

To fix the error “jupyter: command not found”, open the “.bashrc” file and export the “~/.local/bin” path in it then apply the source command to execute it.

To use “pbcopy” and “pbpaste” commands, install the “xclip” and “xsel” and define the aliases, then utilize the syntax “[command] | pbcopy” to copy

To install and play Among Us, download steam and log in to the steam account. After that, enable the steam gameplay, download, and install Among Us.

Yes, the “mkdir -p” command is safe to use; it creates the parent directory and subdirectories and will not override existing directories/subdirectories.

In Linux, the “/opt” directory is particularly for third-party applications, while the “/usr/local/” is for the software built by system administrators.

To set the environment variables in Linux, use the export command with the syntax “export [Variable_Name]=”Value,” while to unset it, use the syntax “unset name.”

In Linux, to kill all user’s processes using their user-id, consider the “pkill” command or “killall” command to kill all processes by username.

To fix the error “ jq: command not found,” install the jq command or completely remove the installed jq command and re-install it.

To watch Netflix on Linux, access the installed application of Netflix, sign in to the Netflix account, or access Netflix through firefox.

In Linux, the bind mount is a special type of mount utilized for simultaneously mounting the device’s file system in two places.

To find all SSH login attempts, use the “grep,” “journalctl,” or the combination of “cat” and “egrep” commands with the “/var/log/auth.log” file.

In Linux, the “$?” is the special variable that stores the execution status of the last command in terms of “1”(Failure) and “0” (successful)

macOS is not based on Linux; both are the Unix-like operating system but share some similarities. There is quite a difference between macOS and Linux features.

Postfix is the mail transfer agent in Ubuntu that stores all records of the emails in the log file located under the directory “/var/log/mail.log”.

To show the DOSBox in full-screen mode, press the “Ctrl+F10” to lock the mouse and then “Left Alt+Enter” or make changes in the “dosbox-0.74-03.conf” File.

Yes, the “z” option with rsync speeds up the backup in specific scenarios depending on the factors like size, types of files, network, and CPU performance.

The “i686” packages run on processors having 32-bit compatibility while “x86_64” runs on processors having both 64-bit and 32-bit based compatibility.

To view all UUIDs for all available disks on the Linux operating system, use the “blkid”, “lsblk”, “ls”, “hwinfo”, “udevadm”, “tune2fs”, “dumpe2fs” commands.

In Linux, the user can use the “nmap”, “netstat”, “netcat”, “/dev/tcp” or “lsof” tools as an alternative besides the “telnet” tool.

To exit from the tmux window, press the keyboard shortcut key “Ctrl+A” or “Ctrl+B” and then “D” or use the “exit”, “tmux detach” or “tmux kill-session” command.

To switch between multiple versions of Java, list the available versions and switch between them using the “sudo update-java-alternatives –set ” command.

To check the currently used DNS server, consider the “resolv.conf” file or built-in tools such as ”dig”, and “nslookup” or use the “Network” settings (GUI).

In Linux, to check the hard disk performance of the system, the user can consider the utilities such as “hdparm”, “dd ”, “iostat”, or the “Disks” tool.

To check the RAM size in the Linux, utilize the “/proc/meminfo file”, “free”, “top”, “vmstat”, “dmidecode”, “lshw”, or “hwinfo” utilities

To find and kill the zombie process on Linux, list down the zombie process, and send the SIGCHLD signal to its parent process.

To reduce the file size of the scanned PDF, use the command line utilities ghostscript (gs), and “ps2pdf” or utilize the PDF online compression tool.

The binary files in Linux are analyzed through the file, ldd, hexdump, strings, readelf, objdump, strace, ltrace, and xxd utilities.

In Linux, the easiest way to copy the SSH keys file to another machine is using the “ssh-copy-id” with the remote hostname.

In Linux, the terminal and shell environment are colorized using the ANSI color code, lolcat utility, or use the “preferences” option of the terminal.

To display the “top” command result sorted by memory usage, run the “top” in the terminal and press the “Shift + M” from the keyboard to sort it.

To add any user to the existing group, use the “userrmod” command with the syntax “sudo usermod -a -G [Group Name] [User Name]”.

The journalctl is the built-in utility to retrieve systemd logs with respect to time, service, boot-time, Kernel-related tasks, etc.

To use the OR condition in the grep command, specify the patterns separated with “\”, or use the Flags “E” or “e” in the given syntax.

To make the chown recursive, use the syntax “chown -R [Mode] [Directory/Path]” for changing the ownership, or “chown -R :[Gorup] [Directory/Path]” for the group.

The reason for the error is that the source path is not specified. To fix this error, specify the source path and copy the file recursively.

The reasons for this error are, either the root password is not set or the password is being entered incorrectly. To fix this, change/set the root password.

To save the output of the terminal into a file, three methods are utilized which are Redirection Operator, tee utility, or script method.

The TTY is a character-based device used as a medium for entering data, still a crucial part of the operating systems but in software form.

To cut the video with the “ffmpeg” tool, use the “ss” flag for the starting point and the “t” flag for specifying the ending point. For cropping, see the guide.

To use the gedit (GNOME Text Editor) command in Linux, open the terminal and type gedit with options and file name to edit the files.

To rsync a directory in Linux, use the “rsync” utility with the various options which depend upon the user’s requirements.

The cause of the bus error is the access to an invalid address, while the cause of the segmentation is the invalid access to valid memory.

To resolve this error, check if “policykit1” is installed. If it is not, then install it using the given command. Secondly, check the root privileges.

To fix this error, install the header “sudo apt install libpq-dev” or “sudo apt install ruby-dev” command in the terminal.

To get the hardware information in Linux, use the “hwinfo”, “lscpu”, “uname”, “free”, “top”, “lsblk”, lspci “lsscsi”, “inxi”, “lsusb” commands.