pi@raspberrypi:~ $ /opt/vc/bin/vcgencmd version Jul 9 2019 14:40:53 Copyright (c) 2012 Broadcom version 6c3fe3f096a93de3b34252ad98cdccadeb534be2 (clean) (release) (start) pi@raspberrypi:~ $ uname -a Linux raspberrypi 4.19.57-v7+ #1244 SMP Thu Jul 4 18:45:25 BST 2019 armv7l GNU/Linux pi@raspberrypi:~ $ /opt/vc/bin/vcgencmd measure_temp temp=45.1'C |
read [argument1] [argument2] ...
sed -e "/^$/d"
type command1 command2 ...
xargs [argument1] [argument2] ...
| DOT_BASHRC=~/.bashrc | |
| # -n True if the length of string is non-zero. | |
| # -r True if file exists and is readable. | |
| if [ -n "$BASH" ] && [ -r "$DOT_BASHRC" ]; then | |
| echo "load $DOT_BASHRC by ~/.profile" | |
| source "$DOT_BASHRC" | |
| fi |
(venv) ➜ k8s git:(develop) ✗ brew install aws-iam-authenticator Updating Homebrew... ==> Auto-updated Homebrew! Updated 3 taps (homebrew/core, homebrew/cask and caskroom/cask). ==> New Formulae .. ==> Downloading https://homebrew.bintray.com/bottles/
aws-iam-authenticator-0.4.0.mojave.bottle.tar.gz ==> Downloading from https://akamai.bintray.com/52... ######################################################################## 100.0% ==> Pouring aws-iam-authenticator-0.4.0.mojave.bottle.tar.gz 🍺 /usr/local/Cellar/aws-iam-authenticator/0.4.0: 5 files, 31.1MB
| #!/usr/bin/env python a=0 b=1 c=2 d=3 e=4 f=5 print(a, b, c, d, e, f) |
| #!/usr/bin/env python a, b, c, d, e, f = range(6) print(a, b, c, d, e, f) |
| #!/usr/bin/env python3.6 from enum import IntEnum,auto class Vars(IntEnum): a=0 b=auto() c=auto() d=auto() e=auto() f=auto() print("{}, {}, {}, {}, {}, {}".format(Vars.a, Vars.b, Vars.c, Vars.d, Vars.e, Vars.f)) |
| $ python2.7 test_init_vars.py (0, 1, 2, 3, 4, 5) $ python3.6 test_init_vars.py 0 1 2 3 4 5 (0, 1, 2, 3, 4, 5) $ python3.6 test_init_vars_by_range.py 0 1 2 3 4 5 $ python2.7 test_init_vars_by_enum.py Traceback (most recent call last): File "test_init_vars_by_enum.py", line 3, in from enum import IntEnum,auto ImportError: cannot import name auto 0, 1, 2, 3, 4, 5 |
| current_mk_abspathname := $(abspath $(lastword $(MAKEFILE_LIST))) | |
| current_mk_absdir := $(dir $(current_mk_abspathname)) | |
| all: | |
| @echo "Makefile absolute pathname: $(current_mk_abspathname)" ; \ | |
| echo "Makefile absolute path: $(current_mk_absdir)" |
| /build$ make -v | |
| GNU Make 4.1 | |
| Built for x86_64-pc-linux-gnu | |
| Copyright (C) 1988-2014 Free Software Foundation, Inc. | |
| License GPLv3+: GNU GPL version 3 or later | |
| This is free software: you are free to change and redistribute it. | |
| There is NO WARRANTY, to the extent permitted by law. | |
| /build$ lsb_release -a | |
| No LSB modules are available. | |
| Distributor ID: Ubuntu | |
| Description: Ubuntu 16.04.4 LTS | |
| Release: 16.04 | |
| Codename: xenial | |
| /build$ make -f 2019-03-21/01-abspath-mk.mk | |
| Makefile absolute pathname: /build/2019-03-21/01-abspath-mk.mk | |
| Makefile absolute path: /build/2019-03-21/ |
| #/bin/bash | |
| # 2019 Ben Wei <ben@juluos.org> | |
| # | |
| # This is a example script for CI tests for blog | |
| # if not defined in environment variable | |
| # you can use the following command to defined it | |
| # | |
| # export TEST_SSH_HOST="your_ssh_host" | |
| # | |
| function run_cases() | |
| { | |
| local case_name="$1" | |
| local args="" | |
| while [ ! "x$1" = "x" ]; do | |
| printf -v __ %q "$1" | |
| args="$args \"$__\"" | |
| shift | |
| done | |
| if [ "x${TEST_SSH_HOST}" = "x" ]; then | |
| TEST_SSH_HOST=test-server | |
| fi | |
| ssh ${TEST_SSH_HOST} "cd test-cases; /bin/bash ./tests.sh $args" | |
| return $? | |
| } |
| #!/bin/bash | |
| i=1 | |
| while [ ! "x$1" = "x" ]; do | |
| echo "argv[$i]=[$1]" | |
| shift | |
| i=$((i + 1)) | |
| done |
| #!/usr/bin/env bash | |
| # Copyright (C) 2019 by Ben Wei <ben@juluos.org> | |
| # Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted. | |
| # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL | |
| # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, | |
| # OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF | |
| # CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| ###### | |
| # sample code of blog | |
| ## tested with bash 4.3.48 x86_64-pc-linux-gnu ubuntu-16.04.4 LTS | |
| verbose=0 | |
| clog() | |
| { | |
| if [ $verbose -gt 0 ]; then | |
| echo $@ | |
| fi | |
| } | |
| syntax() | |
| { | |
| cat << EOF >/dev/stdout | |
| syntax: [options] <message 1> [message 2] [message 3] | |
| options -v verbose of clog | |
| EOF | |
| exit 1 | |
| } | |
| while [ 1 ]; do | |
| if [[ "$1" =~ "-".* ]]; then | |
| if [ "$1" == "-v" ]; then | |
| verbose=1 | |
| fi | |
| shift | |
| else | |
| break | |
| fi | |
| done | |
| if [ -z "$1" ]; then | |
| syntax | |
| fi | |
| arguments=("$1" "$2" "$3") | |
| argc=${#arguments[@]} | |
| if [ "$argc" -eq 0 ]; then | |
| syntax | |
| fi | |
| for ((i=0; i<${argc} ; i++)); do | |
| if [ "x${arguments[$i]}" = "x" ]; then continue; fi | |
| clog "input argument[$i]: ${arguments[$i]}" | |
| done | |
| exit 0 |
| # origin result | |
| bash bash_arguments_example.sh -v "a b" "ff 11" | |
| input argument[0]: a b | |
| input argument[1]: ff 11 | |
| # with debuging option | |
| $ bash -x bash_arguments_example.sh -v "a b" "ff 11" | |
| + verbose=0 | |
| + '[' 1 ']' | |
| + [[ -v =~ -.* ]] | |
| + '[' -v == -v ']' | |
| + verbose=1 | |
| + shift | |
| + '[' 1 ']' | |
| + [[ a b =~ -.* ]] | |
| + break | |
| + '[' -z 'a b' ']' | |
| + arguments=("$1" "$2" "$3") | |
| + argc=3 | |
| + '[' 3 -eq 0 ']' | |
| + (( i=0 )) | |
| + (( i<3 )) | |
| + '[' 'xa b' = x ']' | |
| + clog 'input argument[0]: a b' | |
| + '[' 1 -gt 0 ']' | |
| + echo input 'argument[0]:' a b | |
| input argument[0]: a b | |
| + (( i++ )) | |
| + (( i<3 )) | |
| + '[' 'xff 11' = x ']' | |
| + clog 'input argument[1]: ff 11' | |
| + '[' 1 -gt 0 ']' | |
| + echo input 'argument[1]:' ff 11 | |
| input argument[1]: ff 11 | |
| + (( i++ )) | |
| + (( i<3 )) | |
| + '[' x = x ']' | |
| + continue | |
| + (( i++ )) | |
| + (( i<3 )) | |
| + exit 0 |
