课程第25次
替换文本：# perl -i -pe 's,cat,dog,g'1.txt
# cat 1.txt
dog
dog dog
dog
# sed -i.bak 's/dog/fish/g' 1.txt
# ls
1.txt Desktop initial-setup-ks.cfgPublic Videos
1.txt.bak DocumentsMusic README
anaconda-ks.cfgDownloadsPictures Templates
# cat 1.txt.bak
dog
dog dog
dog
# cat 1.txt
fish
fish fish
fish
# sed -i.bak '1,2s/fish/cow/g' 1.txt
# vim 1.txt
# cat 1.txt
cow
cow cow
fish
cow
lion lion
fish
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
:2,2s#sheep#lion#g # /etc/anacrontab: configuration file for anacron
# See anacron(8) and anacrontab(5) for details.
SHELL=/bin/sh
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
# the maximal random delay added to the base delay of the jobs
RANDOM_DELAY=45
# the jobs will be started during the following hours only
START_HOURS_RANGE=3-22
#period in days delay in minutes job-identifier command
1 5 cron.daily nice run-parts /etc/cron.daily
7 25 cron.weekly nice run-parts /etc/cron.weekly
@monthly 45 cron.monthly nice run-parts /etc/cron.monthly
0 3 mycmd echo $(date) >>/root/anacron.txt
~
页:
[1]