Modern Unix

Modern Unix command

  • tee: Outputting to stdout and a File

  • bat: modern of cat

  • exa: modern of ls, e.g. $exa --git -l --tree

  • fd: modern of find, e.g. $fd ^foo

  • rg: modern of grep

  • jq: sed for json data

  • cheat: cheatsheet, modern of man

  • tldr: modern of man

  • btm: modern of top, bottom

  • glances: modern of top

  • dog: DNS client, modern of dig

  • hyperfine: benchmarking tool

  • gping: modern of ping

  • curlie: modern of curl

  • dust: modern of du, disk usage statistic by file

  • duf: modern of du, show disk free space

  • wrk: monitoring and benchmark

  • tmux: terminal multiplexer: project session-* multi windows -* panes

tmux - terminal multiplexer

  • ctrl+b+c/& : create/exit new window

  • ctrl+b+%/"/x : split pane vertically/horizontally/exit

ssh - send file to remote ssh host

  • $SSH username@ip-address: login into a remote Linux machine using SSH

  • $put file: upload ‘file’ from local to remote computer

  • $get file: Download ‘file’ from remote to local computer

  • $quit: Logout

tar - compression

$ tar cvzf archive_name.tar dirname/: compress $ tar xvf archive_name.tar: uncompress

sed - text processor

sed 's/.$//' filename: Print file content in reverse order $sed -n '1!G;h;$p' thegeekstuff.txt: Add line number for all non-empty-lines in a file

awk - remove duplicate lines using awk

awk '!($0 in array) { array[$0]; print }' temp

sort - sort file in ascending order

sort names.txt

xargs - execute util

modern way to find and execute

fd -t f -e jpg -x tar -czf images.tar.gz

search all jpg images in the system and archive it.

ls *.jpg | xargs -n1 -i cp {} /external-hard-drive/directory

Download all the URLs mentioned in the url-list.txt file

cat url-list.txt | xargs wget –c

service - check the status of all the services.

  • service --status-all

IO direction

  • cmd < file: Input of cmd from file

  • cmd1 <(cmd2): Output of cmd2 as file input to cmd1

  • cmd > file: Standard output (stdout) of cmd to file

  • cmd > /dev/null: Discard stdout of cmd

  • cmd >> file: Append stdout to file

  • cmd 2> file: Error output (stderr) of cmd to file

  • cmd 1>&2: stdout to same place as stderr

  • cmd 2>&1: stderr to same place as stdout

  • cmd &> file: Every output of cmd to file

Pipes

  • cmd1 | cmd2: stdout of cmd1 to cmd2

  • cmd1 |& cmd2: stderr of cmd1 to cmd2

  • cmd1 ; cmd2: Run cmd1 then cmd2

  • cmd1 && cmd2: Run cmd2 if cmd1 is successful

  • cmd1 || cmd2: Run cmd2 if cmd1 is not successful

  • cmd &: Run cmd in a subshell

back Line data on osx

/Users/mac/Library/Containers/jp.naver.line.mac/Data/Library/Containers

parallels keyboard settings (osx)

  • cmd left = home

  • shift cmd left = shifthome

  • cmd right= end

  • shift cmd right= shift end

  • cmd= ctrl

  1. create virtual postscript driver > system perf > add new printer

  2. Choose IP > choose Line Printer Daemon - LPD

  3. In the Address field, type in localhost

  4. preview > print > change preview to layout > change pages per sheet to 2

  5. change back from layout to preview > turn scale to x%

setting OS PATH in the following order

conda ngc /usr/local/sbin 1. /usr/local/bin 2. /usr/bin 3. /bin 4. /usr/sbin 5. /sbins snap/bin

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

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