1 2 3 4 5 6 7 | #!/bin/bash if [[ -e /tmp/adb.log ]] then echo "Exists" else echo "Not Exists" fi |
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1 2 3 4 5 6 | if [[ -z "$emptyString" ]] then echo "Empty" else echo "Not Empty" fi |
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Here is a reference material from Stackoverflowhttp://stackoverflow.com/questions/3767267/check-if-file-exists
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | -d FILE FILE exists and is a directory -e FILE FILE exists -f FILE FILE exists and is a regular file -h FILE FILE exists and is a symbolic link (same as -L) -r FILE FILE exists and is readable -s FILE FILE exists and has a size greater than zero -w FILE FILE exists and is writable -x FILE FILE exists and is executable -z STRING the length of STRING is zero |
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For more detailed information, please visit http://linux.about.com/library/cmd/blcmdl1_test.htm