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Showing posts from December, 2018

How to generate a bash script with an embeeded tar.gz (self-extract)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 > cat extract.sh #!/bin/bash echo "Extracting file into `pwd`" # searches for the line number where finish the script and start the tar.gz SKIP=` awk '/^__TARFILE_FOLLOWS__/ { print NR + 1; exit 0; }' $0` #remember our file name THIS=` pwd `/$0 # take the tarfile and pipe it into tar tail -n +$SKIP $THIS | tar -xz # Any script here will happen after the tar file extract. echo "Finished" exit 0 # NOTE: Don't place any newline characters after the last line below. __TARFILE_FOLLOWS__ 3) Concatenate The script and the tar file together. 1 2 > cat extract.sh example. tar .gz > example.sh > chmod +x example.sh 4) Now test in another directory. 1 2 3 > cp example.sh /tmp > cd /tmp > . /example .sh

namei -om $PWD - follow a pathname until a terminal point is found

laptop:/tmp/t1/t2/t3/t4$ namei -om $PWD f: /tmp/t1/t2/t3/t4  drwxr-xr-x root  root     /  drwxrwxrwt root  root     tmp  drwxr-xr-x teevi www-data t1  drwxrwxr-- teevi www-data t2  drwxr-xr-x teevi www-data t3  drwxr-xr-- teevi www-data t4