wzq@wzq-PC:~/Desktop/redis-5.0.3/src$ gdb redis-server
GNU gdb (Debian 7.12-6+b2) 7.12.0.20161007-git
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from redis-server...done.
(gdb) r
Starting program: /home/wzq/Desktop/redis-5.0.3/src/redis-server
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
8073:C 14 Jan 2019 10:30:29.039 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
8073:C 14 Jan 2019 10:30:29.039 # Redis version=5.0.3, bits=64, commit=00000000, modified=0, pid=8073, just started
8073:C 14 Jan 2019 10:30:29.040 # Warning: no config file specified, using the default config. In order to specify a config file use /home/wzq/Desktop/redis-5.0.3/src/redis-server /path/to/redis.conf
8073:M 14 Jan 2019 10:30:29.040 * Increased maximum number of open files to 10032 (it was originally set to 1024).
[New Thread 0x7ffff67ff700 (LWP 8077)]
[New Thread 0x7ffff5ffe700 (LWP 8078)]
[New Thread 0x7ffff57fd700 (LWP 8079)]_._                                                  _.-``__ ''-._                                             _.-``    `.  `_.  ''-._           Redis 5.0.3 (00000000/0) 64 bit.-`` .-```.  ```\/    _.,_ ''-._                                   (    '      ,       .-`  | `,    )     Running in standalone mode|`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379|    `-._   `._    /     _.-'    |     PID: 8073`-._    `-._  `-./  _.-'    _.-'                                   |`-._`-._    `-.__.-'    _.-'_.-'|                                  |    `-._`-._        _.-'_.-'    |           http://redis.io        `-._    `-._`-.__.-'_.-'    _.-'                                   |`-._`-._    `-.__.-'    _.-'_.-'|                                  |    `-._`-._        _.-'_.-'    |                                  `-._    `-._`-.__.-'_.-'    _.-'                                   `-._    `-.__.-'    _.-'                                       `-._        _.-'                                           `-.__.-'                                               8073:M 14 Jan 2019 10:30:29.042 # Server initialized
8073:M 14 Jan 2019 10:30:29.042 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
8073:M 14 Jan 2019 10:30:29.042 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
8073:M 14 Jan 2019 10:30:29.042 * Ready to accept connections

wzq@wzq-PC:~/Desktop/redis-5.0.3/src$ gdb redis-cli
GNU gdb (Debian 7.12-6+b2) 7.12.0.20161007-git
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from redis-cli...done.
(gdb) r
Starting program: /home/wzq/Desktop/redis-5.0.3/src/redis-cli
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
127.0.0.1:6379>

127.0.0.1:6379> set hello world
OK
127.0.0.1:6379>