Killing rogue programs in Linux The kill command included by default with the Linux suite of commands may be used to terminate a process by passing kill a process ID (PID). By default, kill just tells the process to die, but if the process has made previous arrangements with the…
Read MoreA disturbing amount of people do not know you can reopen your last tab in the Firefox browser with Control+Shift+T. If you use Windows you can drag and snap windows so you can work on stuff side by side. Apparently, pressing F5 on notepad.exe adds a timestamp to the current…
Read MoreRunning a website in 2021 is easy, but there are many things to remember. For one, ensure that all bills are paid automatically. It is very embarrassing when your SSL certificate expires and everyone can see your incompetence. Paying these bills on time is important. Having fast web hosting and…
Read MoreThis command will capture a screenshot of the desktop and save it to the home directory. jason@neo:~$ import -window root "$HOME/$(date ‘+%y%m%d_%T’).png"jason@neo:~$ import -window root "$HOME/$(date ‘+%y%m%d_%T’).png" This is how to do this with the scrot utility. jason@neo:~$ scrot Desktop-%H:%M:%S-%d-%m.jpgjason@neo:~$ scrot Desktop-%H:%M:%S-%d-%m.jpg Characters preceded by a ‘%’ are interpreted by…
Read MoreTo read a file from the Internet using wget and print it in the terminal, use this command. ┌─[jason@jason-desktop]─[~/Documents] └──╼ $wget -qO – https://i.mjh.nz/au/Brisbane/raw-tv.m3u8┌─[jason@jason-desktop]─[~/Documents] └──╼ $wget -qO – https://i.mjh.nz/au/Brisbane/raw-tv.m3u8 View an image from the Internet with wget and the ImageMagik display utility. ┌─[jason@jason-desktop]─[~/Documents] └──╼ $wget -qO – https://i.4cdn.org/g/1603231784644.png | display┌─[jason@jason-desktop]─[~/Documents]…
Read MoreTo get a nice warm screen color instead of a glaring white screen at night, use this very useful program. Redshift will remove blue light from your computer screen and then this will help with sleep. ┌─[jason@jason-desktop]─[/] └──╼ $sudo apt install redshift-gtk┌─[jason@jason-desktop]─[/] └──╼ $sudo apt install redshift-gtk Start Redshift from…
Read MoreSome very useful bash shell tips for using the Linux shell in 2022. These are the best way to use the shell quickly and efficiently.
Read MoreRun the urxvt terminal as a transparent colored terminal window. This is very useful indeed. urxvt -fn "fixed" +sr +st -fg "#FFFFFF" -bg "#000033" -bd "#302c64" \ -ip +sb -title "*-Home-${HOME}-Shell-${SHELL}-Display-${DISPLAY}*" \ -tint DarkSlateGrey -fade 50 -fadecolor redurxvt -fn "fixed" +sr +st -fg "#FFFFFF" -bg "#000033" -bd "#302c64" \ -ip…
Read MoreThere are some tips for Ubuntu that are not as well known as they should be. One tip is searching the bash history. Press Control-R and a prompt will appear. (reverse-i-search)`sudo’: sudo apt-get install libxml2-utils(reverse-i-search)`sudo’: sudo apt-get install libxml2-utils Type a search like “sudo” for example, and the first search…
Read MoreVery nice bash shell prompt This is a very useful Linux shell prompt with color. export PS1="\[\033[38;5;165m\]\d\[$(tput sgr0)\] \[$(tput sgr0)\]\[\033[38;5;51m\]\W\[$(tput sgr0)\] \[$(tput sgr0)\]\[\033[38;5;84m\]\H\[$(tput sgr0)\]@\[$(tput sgr0)\]\[\033[38;5;229m\]\u\[$(tput sgr0)\]:\l>\[$(tput sgr0)\]\[\033[38;5;231m\]\\$\[$(tput sgr0)\] "export PS1="\[\033[38;5;165m\]\d\[$(tput sgr0)\] \[$(tput sgr0)\]\[\033[38;5;51m\]\W\[$(tput sgr0)\] \[$(tput sgr0)\]\[\033[38;5;84m\]\H\[$(tput sgr0)\]@\[$(tput sgr0)\]\[\033[38;5;229m\]\u\[$(tput sgr0)\]:\l>\[$(tput sgr0)\]\[\033[38;5;231m\]\\$\[$(tput sgr0)\] " This prompt will look like this. Mon Mar…
Read MoreHow to check the installed Ubuntu version with the command line. Use this command to check the installed version of the Ubuntu distribution. 4.4 Sat Mar 07 jason@Yog-Sothoth 0: $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=18.04 DISTRIB_CODENAME=bionic DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"4.4 Sat Mar 07 jason@Yog-Sothoth 0: $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=18.04 DISTRIB_CODENAME=bionic DISTRIB_DESCRIPTION="Ubuntu…
Read MoreAwk and bash are a very good combination for extracting certain text strings from a text file or the output of a program. Here I am extracting only the values that are surrounded by square brackets. 4.4 Mon Jan 27 jason@Yog-Sothoth 0: $ lspci | awk -vRS="]" -vFS="[" ‘{print $2}’…
Read MoreVIM is a very useful and versatile editor for Linux. This is how to use it to its full potential. Some great VIM tricks to help for a Linux user or programmer. To read the output of a command into a text file, use the :r command in the command…
Read MoreIf you need to perform a command a second time on a different file, you can use command replacement with the ^ symbol. e.g. cp foo.txt /to/some/directory then ^foo^bar, expanding to: cp bar.txt /to/some/directory. To find information about a particular command, the apropos utility can be very helpful, this will…
Read MoreAdd a new directory to the PATH to allow running an application from it without typing the full path every time you wish to run it. PATH=$PATH:/usr/local/binPATH=$PATH:/usr/local/bin Or you may have something like this in your .bashrc to add this every time you log in. PATH="/home/jason/perl5/bin${PATH:+:${PATH}}"; export PATH;PATH="/home/jason/perl5/bin${PATH:+:${PATH}}"; export PATH;…
Read MoreSSH keysVirtual Private NetworkUse sudo instead of suVulnerability updatesLogin failure delayIptablesPasswords Securing a Linux server is very important. There are many attacks against UNIX servers and the security of corporate networks must be protected by many layered security devices and comprehensive security plans to deal with any problems experienced by…
Read MoreSSH keysVirtual Private NetworkUse sudo instead of suVulnerability updatesLogin failure delayIptablesPasswordsHow to login as root in UbuntuInstall some nice themes and wallpapers in UbuntuGet weather information from the command line in LinuxAdd a nice menu to the Ubuntu MATE panel easily How to login as root in Ubuntu To login…
Read MoreThis sed sample will filter out all HTML opening and closing tags in HTML sed -e ‘s/<[^>]*>//g’ blog.txtsed -e ‘s/<[^>]*>//g’ blog.txt This is an example of the usage of this one-liner. 4.4 Sun Nov 11 jason@Yog-Sothoth 0: $ sed -e ‘s/<[^>]*>//g’ index.php <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">…
Read MorePrint a lost of information about your current terminal using the tcsh shell and a nice command. Yog-Sothoth:~> telltc Tcsh thinks your terminal has the following characteristics: It has 217 columns and 55 lines It has a meta key It can not use tabs It has automatic margins…
Read MoreThis is a very interesting one-liner. This will batch rename files according to wildcards. jason@Yog-Sothoth » Pictures » $ for i in *.png; do mv -vi — "${i}" "$(date +%s%3N).${i#*.}"; done This renames files with a filename generated using the UNIX epoch. I guess this could be useful to someone…
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