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bluetooth keyboards
by PETER REGELOUS 14 Apr '23

14 Apr '23

Dear Forum Team Is it true that not many bluetooth keyboards would come with a dongle these days as you don't need it. it just uses the bluetooth built into most motherboards now, or a 3rd party dongle. The types that pair with dongles generally use some other RF protocol. Please let me have your take on the above. Good week-ends to 1 + all. Peter Regelous via UK

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1D1C - tty
by Dhanasekar 14 Apr '23

14 Apr '23

tty - print the file name of the terminal connected to standard input $ tty /dev/pts/0 To Print nothing, only return an exit status. $ tty -s regards, T.Dhanasekar

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1D1C - tsort
by Dhanasekar 13 Apr '23

13 Apr '23

tsort - perform topological sort To perform topological sort $ cat demo.txt a b c d e f g z b c d h $ tsort demo.txt To redirect output to a file $ tsort > demo_out.txt regards, T.Dhanasekar

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1D1C - truncate
by Dhanasekar 12 Apr '23

12 Apr '23

truncate - shrink or extend the size of a file to the specified size To Clear contents of a file with truncate $ truncate -s 0 example.txt To truncate a file to a specific size $ truncate -s 200K example.txt To extend file size $ truncate -s +400K example.txt To reduce file size $ truncate -s -100k example.txt regards, T.Dhanasekar

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1D1C - troff
by Dhanasekar 11 Apr '23

11 Apr '23

troff - it performs typesetting functions and formats documents Troff the input file $ troff example.txt troff command $ troff Hello world! ^D To pipe the output of troff $ troff > output Welcome to Linux world ^D To append the output of troff $ troff >> output Welcome to python ^D regards, T.Dhanasekar

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1D1C - trap
by Dhanasekar 10 Apr '23

10 Apr '23

trap - is used to execute a command when the shell receives any signal is called `trap`. syntax $ trap [options] "[arguments]" [signals] To display the list of all commands associated with each condition $ trap To display the list of all signal names with number $ trap -l To Set `trap` command with signal number of SIGUP, SIGQUIT and SIGKILL $ trap 'echo Trap command executed' 1 3 9 $ press Ctrl+C $ ^CTrap command executed $ trap To Set trap command for ERR and EXIT $ trap 'rm file.txt' err exit $ trap regards, T.Dhanasekar

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1D1C - traceroute
by Dhanasekar 09 Apr '23

09 Apr '23

traceroute - traces path to a network host To find the network path from my machine to google.com $ traceroute google.com To Disable IP address and host name mapping $ traceroute google.com -n $ traceroute ilugc.in -n To Configure Response Wait Time $ traceroute google.com -w 0.1 To configure number of queries per hop $ traceroute google.com -q 5 To Configure the TTL value to start with $ traceroute google.com -f 8 $ traceroute ilugc.in -f 10 regards, T.Dhanasekar

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1D1C - tr
by Dhanasekar 08 Apr '23

08 Apr '23

tr - is used to translate and/or delete characters from stdin input and writes to stdout $ cat example.txt linux os is powerful linux os is versatile linux os is best To change all lowercase letters in the text to uppercase and vice versa $ cat example.txt | tr [:lower:] [:upper:] or $ cat example.txt | tr [a-z] [A-Z] To save the results written to stdout in a file $ cat example.txt | tr [a-z] [A-Z] >output.txt To send input to tr using the input redirection and redirect the output to a file $ tr [a-z] [A-Z] < linux.txt >output.txt To delete characters and remove spaces $ cat domain.txt www. ilugc. in www. chennaipy. org www. google. com $ cat domains.txt | tr -d '' To remove repeated characters in a sequence $ cat domains.txt www. ilugc........... innnn www. chennaipy. org www. google. com $ cat domains.txt | tr -s '' To delete all the letters and only leave the UID $ echo "My UID is $UID" | tr -cd "[:digit:]\n" To break a single line of words (sentence) into multiple lines $ echo "My UID is $UID" $ echo "My UID is $UID" | tr " " "\n" To translate multiple lines of words into a single sentence $ cat uid.txt My UID is 1000 $ tr "\n" " " < uid.txt To translate single character, for instance, a space into a “ : ” $ echo "ilugc.in =>linux,devops,cloud,programming" | tr " " ":" $ echo "ilugc.in =>linux devops cloud programming" | tr " " ":" regards, T.Dhanasekar

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1D1C - tput
by Dhanasekar 07 Apr '23

07 Apr '23

tput - is used to query the terminfo terminal database and check if that terminal supports a specific feature. To Set the Cursor Position using tput cup $ tput cup 5 6 $ tput cup 10 10 To Clear the Screen Using tput clear $ tput clear To Get the Number of Columns and Lines of a Terminal $ tput cols $ tput lines To Execute Multiple tput Commands $ tput -S <<END > clear > cup 2 4 > END To Turn On and Turn Off Highlighting $ echo `tput bold`ilugc`tput sgr0` $ echo `tput sgr0`ilugc`tput sgr0` To Underline Text using smul and rmul $ echo `tput smul`ilugc`tput rmul` $ echo `tput rmul`ilugc`tput rmul` To Hide and Unhide the Cursor using civis and cnorm $ tput civis $ tput cnorm regards, T.Dhanasekar

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JOB | On Premises DevOps Automation Engineer (London/Singapore)
by James Tobin 06 Apr '23

06 Apr '23

Hello, I'm working with an employer that is looking to hire someone to join their global on premises devops automation team. You should have experience in automation and management of platform configuration. They are looking at using Kubernetes or similar for their on premises servers and processes; moving away from virtual machines. You should be articulate and confident in all things ansible and automation; capable of taking center stage in meetings, presentations and tech conferences. The position will be based in London and/or Singapore. I had hoped that some members of this group may like to discuss further. I can be reached using "JamesBTobin (at) Gmail (dot) Com". Kind regards, James

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