How do I list one filename per output line in Linux

Question

I m using ls -a command to get the file names in a directory  but the output is in a single line    Like this           bash history   ssh  updater error log txt   I need a built-in alternative to get filenames  each on a new line  like this             bash history    ssh   updater error log txt

User · Answer

you can use ls -1  ls -l will also do the work

User · Answer

Yes  you can easily make ls output one filename per line   ls -a   cat   Explanation  The command ls senses if the output is to a terminal or to a file or pipe and adjusts accordingly   So  if you pipe ls -a to python it should work without any special measures

User · Answer

You can also use ls -w1 This allows to set number of columns  From manpage of ls     -w  --width COLS           set output width to COLS   0 means no limit

User · Answer

Use the -1 option  note this is a  one  digit  not a lowercase letter  L    like this    ls -1a     First  though  make sure your ls supports -1  GNU coreutils  installed on standard Linux systems  and Solaris do  but if in doubt  use man ls or ls --help or check the documentation  E g      man ls            -1     list one file per line   Avoid   n  with -q or -b

User · Answer

ls   tr  quot  quot   quot  n quot

User · Answer

Ls is designed for human consumption  and you should not parse its output   In shell scripts  there are a few cases where parsing the output of ls does work is the simplest way of achieving the desired effect  Since ls might mangle non-ASCII and control characters in file names  these cases are a subset of those that do not require obtaining a file name from ls   In python  there is absolutely no reason to invoke ls  Python has all of ls s functionality built-in  Use os listdir to list the contents of a directory and os stat or os to obtain file metadata  Other functions in the os modules are likely to be relevant to your problem as well     If you re accessing remote files over ssh  a reasonably robust way of listing file names is through sftp   echo ls -1   sftp remote-site dir   This prints one file name per line  and unlike the ls utility  sftp does not mangle nonprintable characters  You will still not be able to reliably list directories where a file name contains a newline  but that s rarely done  remember this as a potential security issue  not a usability issue    In python  beware that shell metacharacters must be escapes in remote dir    command line    echo ls -1   sftp     remote site         remote dir remote files   os popen command line  read   split   n     For more complex interactions  look up sftp s batch mode in the documentation   On some systems  Linux  Mac  OS  X  perhaps some other unices  but definitely not Windows   a different approach is to mount a remote filesystem through ssh with sshfs  and then work locally

User · Answer

Easy  as long as your filenames don t include newlines   find   -maxdepth 1   If you re piping this into another command  you should probably prefer to separate your filenames by null bytes  rather than newlines  since null bytes cannot occur in a filename  but newlines may    find   -maxdepth 1 -print0   Printing that on a terminal will probably display as one line  because null bytes are not normally printed  Some programs may need a specific option to handle null-delimited input  such as sort s -z  Your own script similarly would need to account for this

[linux] How do I list one filename per output line in Linux?

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