Commands by elzapp (4)

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Perl oneliner to print access rights in octal format
This prints file access rights in octal - useful when "stat" is unavailable.

Show directories in the PATH, one per line
Shorter version.

Create a mirror of a local folder, on a remote server
Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Top Command in batch mode
running top command in batch mode. it is usefull if you want to redirect the output in a file.

Compress blank lines

Remove Backup Files
Remove all text backup files.

Quickly generate an MD5 hash for a text string using OpenSSL
Here Strings / A variant of here documents, the format is:

pngcrush all .png files in the directory
Find all pngs in directory structure and pngcrush them, none destructive. You can just remove the "{}.crush" part if you want destructive.

Force logout after 24 hours idle
Shell timeout variables (TMOUT) can be very liberal about what is classified as 'activity', like having an editor open. This command string will terminate the login shell for an user with more than a day's idle time.

remove execute bit only from files. recursively

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