linux - Bash grabbing directory name to use in loop -

i want grab names of directorys create tar.gz file each

for example, directorys beginning a:

count = 10  ((k = 1 ; k < $count ; k++));     tar -cf adirname.tar.gz adirname     sleep 1 done 

how can this?

this create tarball each a* directory.

for dir in a*/;     tar -cf "${dir%/}".tar.gz "$dir" done 

the wildcard expands list of directory names loop over. trailing slash sets matches off directories included in expansion; trim tarball's filename simple variable substitution (${variable%suffix} expands variable's value suffix trimmed end if present; there corresponding ${variable#prefix} , number of other substitutions; see shell's man page.)

the double quotes mandatory, although script work without them long there no file names whitespace in them. common oversight in many shell scripting tutorials.