Changing parent directory (../) with symlinks
I have a symlink
bash
Bash regex capture group
I’m trying to match multiple alphanumeric values (this number could vary) from a string and save them to a bash capture group array. However, I’m only getting the first match:
Bash variable substitution of variable followed by underscore
The variable BUILDNUMBER is set to value 230. I expect 230_ to be printed for the command echo $BUILDNUMBER_ but the output is empty as shown below.
Finding command execution time in hindsight
I’ve just executed a long-running process from the bash prompt. In hindsight, I wish I’d run time on it, or noted down the time at which I kicked it off.
grep files from list
I am trying to run grep against a list of a few hundred files:
How to customize Bash command completion?
In bash, it’s easy enough to set up customized completion of command arguments using the complete built-in. For example, for a hypothetical command with a synopsis of
removing or clearing stack of popd/pushd paths
After pushding too many times, I want to clear the whole stack of paths.
Compare two files for matching lines and store positive results
I have two files. File 1: A0001 C001 B0003 C896 A0024 C234 . B1542 C231 . upto 28412 such lines File 2: A0001 A0024 B1542 . . and 12000 such lines. I want to compare File 2 against File 1 and store the matching lines from File 1. I tried Perl and Bash but none … Read more
whiptail or dialog
I am going to create a script which will use user input, so I decided to use whiptail.
what is the difference between >&2 and &>2
There are two formats for redirecting standard output and standard error: