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Install pip with Proxy
Installs pip packages defining a proxy

Remount root in read-write mode.
Saved my day, when my harddrive got stuck in read-only mode.

Check variable has been set

Install pip with Proxy
Installs pip packages defining a proxy

Remove executable bit from all files in the current directory recursively, excluding other directories
Useful if you have copied files from an OS without a permission structure (for example, DOS) and you need to disable all executable files but want to be able to descend into your directories.

All what exists in dir B and not in dir A will be copied from dir B to new or existing dir C
Assumed dir A, B, C are subdirs of the current dir Exact syntax of the command is: rsync -v -r --size-only --compare-dest=/path_to_A/A/ /path_to_B/B/ /path_to_C/C/ (do not omit end-slashes, since that would copy only the names and not the contents of subdirs of dir B to dir C) You can replace --size-only with --checksum for more thorough file differences validation Useful switch: -n, --dry-run perform a trial run with no changes made

Alternative size (human readable) of files and directories (biggest last)

Count number of bytes that are different between 2 binary files

Short and sweet output from dig(1)
Turn off almost all of dig's output except for what you'd see in a zone file. This can also be put into ~/.digrc.

List .log files open by a pid
Uses lsof to display the full path of ".log" files opened by a specified PID.


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