Commands by alfplayer (0)

  • bash: commands not found

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Realtime apache hits per second
Change the cut range for hits per 10 sec, minute and so on... Grep can be used to filter on url or source IP.

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

ping a range of IP addresses
nmap accepts a wide variety of addressing notation, multiple targets/ranges, etc.

Function to remove a directory from your PATH
Function to remove a specified path from your PATH environment variable.

list block devices
Shows all block devices in a tree with descruptions of what they are.

Clean the /boot directory
On Fedora clean the boot directory; erase older kernel

Run local bash script on remote server
Run local scripts on remote server. "-T Disable pseudo-tty allocation"

Repoint an existing symlink to a new location
Instead of deleting an existing symlink and then re-creating it pointing at the new location, it is possible to perform the same action with this one command. Interesting discussion on whether this is possible to do atomically here: http://answers.google.com/answers/threadview?id=526119

Comment out a line in a file
This will comment out a line, specified by line number, in a given file.

Create a CD/DVD ISO image from disk.
Many like to use 'dd' for creating CD/DVD iso images. This is bad. Very bad. The reason this is, is 'dd' doesn't have any built-in error checking. So, you don't know if you got all the bits or not. As such, it is not the right tool for the job. Instead, 'reaom' (read optical media) from the wodim package is what you should be using. It has built-in error checking. Similarly, if you want to burn your newly creating ISO, stay away from 'dd', and use: $ wodim -v -eject /path/to/image.iso


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