Show all deb packages installed on the system

dpkg -l

Update the package list - do this after you change the source in /etc/apt/sources.list .

apt-get update

This command lists all known encodings

iconv -l

List all packages installed on the system

yum list

Show space used by rpm packages installed sorted by size (fedora, redhat and like)

rpm -q -a --qf "%10{SIZE}\t%{NAME}\n" | sort -k1,1n

Recursively list all files in the current folder and all the sub folders

ls -R

ls -R1

Save the list of all files in a folder in windows - recursively.

dir /s /b>FileList.txt

[tags]command, dir, directory, folder, windows, list, ls ,recursive[/tags]

This command will list all the files a folder without their extensions. Comes handy when doing shell scripting

perl -e 'while(<*.*>){s/\..{3}$//i;print "File \"$_\"\n";}print "\n";'

Save the list of all files in a folder - recursively.

find .|sed 's/\.\///;'

Another option is

ls -R -1

Kind of like the DOS command ‘dir /s‘

[tags]dir,ls,command,linux,folder,list,recursive,directory[/tags]