| Copy FOLDER_1 into PATH_B and preserve all attributes | |
| sudo rsync -avihXP --info=progress2 --stats /PATH_A/FOLDER_1/ /PATH_B/ | |
| * use --dry-run to test | |
| * for encoding char problems between Mac/Linux : https://serverfault.com/questions/638316/rsync-iconv-option-on-mac-not-working-sync-from-remote-linux-server-to-local | |
| ** rsync initiated from Mac : --iconv=utf-8-mac,utf-8 | |
| ** rsync initiated from Linux : --iconv=utf-8,utf-8-mac |
| #https://stackoverflow.com/a/10965292 | |
| [ -n "$var" ] && echo "var is set and not empty" | |
| [ -z "$var" ] && echo "var is unset or empty" | |
| [ "${var+x}" = "x" ] && echo "var is set" # may or may not be empty | |
| [ -n "${var+x}" ] && echo "var is set" # may or may not be empty | |
| [ -z "${var+x}" ] && echo "var is unset" | |
| [ -z "${var-x}" ] && echo "var is set and empty" |
Guide to :
Some other informations :
| # Solutions from https://stackoverflow.com/a/20855353 | |
| # SOLUTION 1 : analyse at the current level of execution (do not step into code) | |
| # get https://www.f-hauri.ch/vrac/cours_truc-et-astuces_2012-04-03/add/elap.bash-v2 |
| traefik: | |
| image: traefik:v2.1.6 | |
| container_name: traefik | |
| volumes: | |
| - "traefik.enable=true" | |
| - /var/run/docker.sock:/var/run/docker.sock:ro | |
| - ./traefik-conf.yml:/etc/traefik/traefik.yml | |
| - ./traefik-services.yml:/etc/traefik/services.yml | |
| labels: | |
| - "traefik.http.routers.blog.entrypoints=web_main" |
| # launch a shell with an empty env | |
| # https://unix.stackexchange.com/a/291913 | |
| env -i bash --noprofile --norc | |
| # source var file and show a specific var | |
| env -i bash --noprofile --norc -c ". somefile.sh; echo $VAR;" | |
| # backup/restore env | |
| # https://unix.stackexchange.com/questions/284382/export-save-and-import-source-shell-variables |
| # count number of active task inside of all user crontab | |
| # sample with excluding a string containing "str" | |
| for c in $(sudo ls /var/spool/cron); do sudo crontab -u $c -l 2>/dev/null | grep -v -e '^$' | grep -v -e '^#' | grep -v "crontab;" | grep -v "str"; done | wc -l |
| #!/bin/bash | |
| # This script is designed to work only with recent bash implementations, not ash/dash etc. | |
| # @file show-cron-jobs.sh | |
| # | |
| # published at: | |
| # https://gist.github.com/myshkin-uk/d667116d3e2d689f23f18f6cd3c71107 | |
| # | |
| # @NOTE DGC 2-Sep-2019 | |
| # There is one comment there that the script doesn't run as expected. |
| # https://stackoverflow.com/a/38731052 | |
| # variable substitution, leading tab retained, overwrite file, echo to stdout | |
| tee /path/to/file <<EOF | |
| ${variable} | |
| EOF | |
| # no variable substitution, leading tab retained, overwrite file, echo to stdout |