Shell Script: Read File Line by Line
Objective: Read the contents of a file line by line in a shell script.
Tag Archives: linux
Shell Script: Get HTTP Content
Objective: Fetch the contents of a HTTP URL and save the contents in a variable in a shell script.
Vim / Vi: Save File Without Root Permissions
Objective: You open a file for editing on vi but you do not have write permissions for that file. You make changes and when you try to save changes, you get the infamous error “E212: Can’t open file for writing” from vim / vi editor. You realise that you forgot to execute vi with sudo. How do you save the file without creating a temporary file?
Linux: Change IO Scheduler of Device
Objective: Change the IO scheduler of a disk (or block device) at run time to improve IO performance or throughput.
Bash: Escape String Variable
Objective: Escape or append a ‘\’ to reserved characters (e.g &, \, |, ?, *, etc) found on a string variable in bash.
Linux: Remove Blank / Empty Lines from File
Objective: Remove all blank and empty lines from a text file on Linux.
Linux: Get UUID from Disk
Objective: Map a UUID (universally unique identifier ) to a device and vice versa on Linux.
Linux: Create RAM Disk Filesystem
Objective: Create a Linux filesystem or partition using RAM for extremely fast access.
Unix / Linux: Time a Command
Objective: Track the amount of time a command takes on Unix / Linux.
Shell Script: Count Variable Length
Objective: Count the number of characters in a shell variable.
