How to use the strace and ltrace commands: 2-Minute Linux Tips

The video tutorial explains the use of strace and ltrace commands in Linux for monitoring system and library calls made by processes. It demonstrates how to use strace with the PWD command to view system calls and how to redirect the output to a file. The tutorial also covers the ltrace command, which is similar to strace but focuses on library calls, and shows how to generate a summary of these calls.

What is the primary purpose of the strace and ltrace commands?

• To monitor network traffic on a Linux system

• To manage user permissions on a Linux system

• To install new software packages on Linux

• To provide information on system and library calls made by a Linux process

What does the strace command primarily track?

• Network packets

• System calls

• User logins

• File permissions

Why might you want to redirect the output of strace to a file?

• To reduce the size of the output

• To increase the speed of the strace command

• To automatically analyze the output

• Because strace output cannot be redirected through pipes

How does ltrace differ from strace?

• ltrace is used for network monitoring, while strace is for file monitoring

• ltrace tracks system calls, while strace tracks library calls

• ltrace tracks library calls, while strace tracks system calls

• ltrace is a graphical tool, while strace is command-line based

What information does ltrace provide about library calls?

• The number of times each library call was made and the time taken

• The size of each library call

• The memory usage of each library call

• The network bandwidth used by each library call