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simon / Bash

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bash.md Raw

bash

  • log everything to a file:
#!/bin/bash
(
...
) 2>&1 | tee -a file
  • more subshells may potentially be needed:
#!/bin/bash
((
...
) 2>&1) | tee -a file
  • create a file from a heredoc:
cat << EOF > /tmp/yourfilehere

These contents will be written to the file.
        This line is indented.
EOF
  • find files holding a mountpoint open:
$ dmsetup info -c | grep root

data-root        254   8 L--w    1    1      0 LVM-C6c8ojMf4YLaSZearY2kTlKbL23Hue9RFUByBbzCncyPWemQGMz9EnmHyNjfJdxy
$ lsof | grep "254,8"