Shell Programming and Scripting

I have the small script to arrange files of a descending way.

Code:

ls -l |sort -r -k4

i wanted for example if I place -d one arranges only the folders or -a to arranges only the files.

Cheers

Code:

ls -l | grep -v '^total ' | if [ "$1" = "-d" ]
then
 grep '^d'
else
 grep -v '^d'
fi | sort -r -k4

hi When I execute the script the following mistake goes out.

Code:

root@ubuntu:~# sh scrph.cap
scrph.cap: 6: ls: not found
scrph.cap: 6:  grep: not found

Sort for files.

Code:

find . -type f -ls |sort -r -k4

Sort for folders.

Code:

find . -type d -ls |sort -r -k4

Maybe you need adjust the sort column.

For example when i execute the command sh scriptejemplo.cap -d /home one arranges only the folders.

sh scriptejemplo.cap -a /home one arranges only the files. of the directory home.

You should move past calling "sh scriptname args" to putting a first line of "$#/bin/sh" (or wherever) in your script and "chmod u+x scriptname". See man 2 exec. Then, you just call "scriptname args".

You might move on to ksh, too, as sh has real limitations and ksh offers a proper superset of the sh commands and such. ksh93 is free. ubuntu should come with at least pdksh, which is not the real deal but better than sh!

If a script says "'ls' is not known", it is saying your $PATH is not exported so it could not find it in /usr/bin/ls or /bin/ls or wherever. Just setting an variable only affects it in the memory of the current instance of sh. In sh you must:

Code:

PATH=dir1:dir2:dir3 ; export PATH

but in ksh you can say it more cleanly:

Code:

export PATH=dir1:dir2:dir3

A directory can have thing other than files and dirs in it, like devices, symbolic links and named pipes, so my code does dirs or everything else.

i have changed script

Code:

#!bin/bash
cd $1
ls -lS $1

I can to see the files for descending size /miscript.sh /root for example.
How i can to place at the end of the command, if I place -d one arranges only the folders or -a to arranges only the files.

Code:

./miscript.sh /root -d Folders
./miscript.sh /root -a Documents