xmengnet/the-art-of-command-line
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Edits to #219.

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Joshua Levy 2015-07-23 16:45:37 -07:00
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@ -100,7 +100,7 @@ Notes:
- See also `lsof` for open sockets and files. - See also `lsof` for open sockets and files.
- See `uptime` or `w` to know the how long the system is running. Follow the value after the word 'up' in the output. - See `uptime` or `w` to know the how long the system has been running.
- Use `alias` to create shortcuts for commonly used commands. For example, `alias ll='ls -latr'` creates a new alias `ll`. - Use `alias` to create shortcuts for commonly used commands. For example, `alias ll='ls -latr'` creates a new alias `ll`.
@ -253,7 +253,7 @@ Notes:
- Know how to connect to a running process with `gdb` and get its stack traces. - Know how to connect to a running process with `gdb` and get its stack traces.
- Use `/proc`. It's amazingly helpful sometimes when debugging live problems. Examples: `/proc/cpuinfo`, `/proc/meminfo`, `/proc/cmdline, ``/proc/xxx/cwd`, `/proc/xxx/exe`, `/proc/xxx/fd/`, `/proc/xxx/smaps` (where xxx is the process id or pid). - Use `/proc`. It's amazingly helpful sometimes when debugging live problems. Examples: `/proc/cpuinfo`, `/proc/meminfo`, `/proc/cmdline`, `/proc/xxx/cwd`, `/proc/xxx/exe`, `/proc/xxx/fd/`, `/proc/xxx/smaps` (where `xxx` is the process id or pid).
- When debugging why something went wrong in the past, `sar` can be very helpful. It shows historic statistics on CPU, memory, network, etc. - When debugging why something went wrong in the past, `sar` can be very helpful. It shows historic statistics on CPU, memory, network, etc.
@ -441,9 +441,7 @@ A few examples of piecing together commands:
- `lshw`, `lscpu`, `lspci`, `lsusb`, `dmidecode`: hardware information, including CPU, BIOS, RAID, graphics, devices, etc. - `lshw`, `lscpu`, `lspci`, `lsusb`, `dmidecode`: hardware information, including CPU, BIOS, RAID, graphics, devices, etc.
- `lsmod`: List currently loaded kernel modules. - `lsmod` and `modifno`: List and show details of kernel modules.
- `modinfo`: Show details of a particular kernel module.
- `fortune`, `ddate`, and `sl`: um, well, it depends on whether you consider steam locomotives and Zippy quotations "useful" - `fortune`, `ddate`, and `sl`: um, well, it depends on whether you consider steam locomotives and Zippy quotations "useful"