Linux

List files

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Change dir

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Print working dir

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Copy file

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Move/rename

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Remove file

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Make directory

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Create empty file

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Show file contents

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Page through file

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First lines

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Last lines

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Find files

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which

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Home shortcut

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grep

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grep -i

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grep -r

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pipe

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redirect out

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append

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stdin redirect

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wc -l

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sort

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uniq

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cut

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sed

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awk

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tee

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chmod

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chown

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rwx

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755 meaning

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sudo

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root user

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whoami

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passwd

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file owner group

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ps

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top

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kill

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kill -9

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background job

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jobs

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nohup

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systemctl

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service status

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journalctl

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cron

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crontab -e

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env vars

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export

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PATH

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alias

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ping

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curl

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ssh

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scp

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netstat/ss

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apt/yum

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