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Rename all files in current directory by names from text file 'zzz'
This one has a better performance, as it is a one pass count with awk. For this script it might not matter, but for others it is a good optiomization.
list all files are greater than 10mb
make usable on OSX with filenames containing spaces. note: will still break if filenames contain newlines... possible, but who does that?!
This command will ask for remote sudo password before executing a remote command.
A way to display directory structure
This will show you the permissions on the directory you are currently in
Sometime you need to monitor file or direcory change in dimension or other attributes. This command output file (called myfile in the example) attributes in the top of the screen, updating each 1 second.
You should change update time, command ( e.g., ls -all ) or target ( myfile, mydir, etc...).
zsh globbing and glob qualifier:
'**/*' = recursive
om = ouput by modification (last access)
[1,20] = twenty files.
The '-t' switch is provided to ls so that the files are ordered with the most recent at the top. For a more 'find' like output the following can be used.
print -rl **/*(om[1,20])
zsh: list of files sorted by size, greater than 100mb, head the top 5. '**/*' is recursive, and the glob qualifiers provide '.' = regular file, 'L' size, which is followed by 'm' = 'megabyte', and finally '+100' = a value of 100
Find top 5 big files
I find it useful, when cleaning up deleting unwanted files to make more space, to list in size order so I can delete the largest first.
Note that using "q" shows files with non-printing characters in name.
In this sample output (above), I found two copies of the same iso file both of which are immediate "delete candidates" for me.
Long listing alternative
I find it very handy to be able to quickly see the most recently modified/created files in a directory.
Note that the "q" option will reveal any files with non-printable characters in their filename.
list only directories in reverse order
On the Mac, the 'ls' function can sort based on month/day/time, but seems to lack ability to filter on the Year field (#9 among the long listed fields). The sorted list continuously increases the 'START' year for the most recently accessed set of files. The final month printed will be the highest month that appeared in that START year. The command does its magic on the current directory, and suitably discards all entries that are themselves directories. If you expect files dating prior to 2002, change the START year accordingly.