Shell Script: Get HTTP Content
Objective: Fetch the contents of a HTTP URL and save the contents in a variable in a shell script.
Tag Archives: unix
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?
Bash: Escape String Variable
Objective: Escape or append a ‘\’ to reserved characters (e.g &, \, |, ?, *, etc) found on a string variable in bash.
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.
Shell Script: Convert Lowercase to Uppercase
Objective: Convert the contents of a file or the contents of a shell string variable from lowercase to uppercase.
Solaris GNU Utilities
Most of the Solaris utilities (eg. find, grep, awk, sed) are sort of crippled when compared to their GNU counterparts. The GNU versions of the utilities are relatively flexible, in the sense that they most often support additional useful features.
Unix / Linux: Count Files in Directory
Objective: Count the number of files in a directory on Unix or Linux.
Unix / Linux: Print IO Statistics of Running dd Process
Let’s say you have a dd process that is running. By default, dd will only print IO statistics once the job has been completed or if it is interrupted by a Ctrl-C (SIGINT) command. While the job is running, you will probably have no idea how much data has been copied, the current progress or the copying speed. But fret not, there is actually a way to get the IO statistics of a running dd process.
Shell Script: Convert Uppercase to Lowercase
Objective: Convert the contents of a file or the contents of a shell string variable from uppercase to lowercase.
