Linux Commands – learn cli the hard way – Flashcards
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pwd
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print working directory
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hostname
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my computer's hostname
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mkdir
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make directory
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cd
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change directory
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ls
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list directory
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rmdir
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remove directory
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pushd
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push directory
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popd
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pop directory
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cp
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copy a file or directory
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mv
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move a file or directory
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less
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page through a file
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cat
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print the whole file
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xargs
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execute arguments
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find
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find files
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grep
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find things inside files
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man
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read a manual page
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apropos
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find what man page is appropriate
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env
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look at your environment
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echo
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print some arguments
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export
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export/set a new environmental variable
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exit
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exit the shell
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sudo
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DANGER! become super user root DANGER!
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chmod
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change permission modifiers
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chown
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change ownership
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|
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Takes the output from the command on the left and "pipes" it into the command on the right
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<
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Takes the input from the command on the right to the program on the left
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>
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Takes the output of the command on the left and writes it to the file on the right
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>>
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Takes the output of the command on the left and appends it to the file on the right
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*
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matching anything in a wildcard like *.txt
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find
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find STARTDIR -name WILDCARD -print
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tac
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used to look at a file backwards, one line at a time
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df -h
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Displays information about mounted filesystems including usage statistics about currently used and available space
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mount
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used to attach a filesystem. without options and arguments will list all of the currently mounted filesystems along with information that will indicate whether they are mounted as read only or writable.
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file
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tells you the type of a file that a file is (i.e text file, directory, executable etc)
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diff
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compare 2 files
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diff3
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compare 3 files
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rsync
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used to backup files or entire directories with the -r flag. Specify the source and then the target
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gzip
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zip a file or directory with the gzip compression type
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gunzip
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unzip gzip files
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xz
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zip a file or directory with the xz compression type
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tar xvf mydir.tar
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extract all the files in mydir.tar into the mydir directory
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dd if=/dev/sda of=/dev/sdb
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copy entire contents of one disk to another
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who
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list currently logged on users
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whoami
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identify currently logged on user
