Linux learning note (3)

Check which shared libraries an executable file is lazy:

LDD commands are available for local executable files.

For cross-compiling, you can use arm-None-Linux-gnueabi-LDD to specify the root directory. You can use arm-None-Linux-gnueabi-LDD -- help to view help.

In addition, you can use: Arm-None-Linux-gnueabi-readelf-a test | grep shared # test is an executable file. In this way, test is a shared file that is directly lazy, there is no path.

Duplicate rows are often deleted during text processing. The following are three methods:

First, use sort + uniq. Note that uniq alone cannot be used.
Sort-N test.txt | uniq

Second, use the sort + awk command. Note that awk alone does not work, for the same reason.

Sort-N $ file | awk '{if ($0! = Line) print; line = $0 }'

Third, use the sort + sed command, which also requires the sort command to be sorted first.

Sort-N $ file | sed '$! N;/^ \ (. * \) \ n \ 1 $ /! P; D'