2

When I use the top command in linux terminal:

top -c

the output like this:

top - 21:54:17 up 197 days,  6:34,  1 user,  load average: 0.10, 0.65, 1.47
Tasks: 255 total,   1 running, 200 sleeping,   0 stopped,  54 zombie
%Cpu(s):  6.0 us,  4.5 sy,  0.0 ni, 87.4 id,  0.5 wa,  1.0 hi,  0.5 si,  0.0 st
MiB Mem :   3625.3 total,    119.0 free,   2408.5 used,   1097.9 buff/cache
MiB Swap:      0.0 total,      0.0 free,      0.0 used.    936.8 avail Mem

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
1398379 root      20   0 2498248  92148  20716 S   3.0   2.5   2055:04 /usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/k+
1403326 root      20   0 1892712 560052  27112 S   2.7  15.1   2502:04 kube-apiserver --advertise-address=172.31.227.20 --allow-privileged=true --authorization-mode=Node+
1428214 root      20   0 1402944 125200   9776 S   1.3   3.4 801:06.55 cilium-agent --config-dir=/tmp/cilium/config-map
3848379 root      20   0  269028  27268   7500 S   1.3   0.7 256:37.39 /usr/local/aegis/aegis_client/aegis_12_43/AliYunDunMonitor
 791206 root      20   0  125488  17484  11720 S   1.0   0.5   0:00.10 /usr/local/aegis/AliSecCheck/AliSecCheck -t rtap -c Rtap20483038711736690048
1399005

I can see part of the command content, how to auto wrap the command when the commend is too long? I have tried:

[root@iZm5e2jhfbrshckqh6qdbuZ poemhub]# top -bcn1 -w100
top - 21:55:33 up 197 days,  6:35,  1 user,  load average: 0.47, 0.70, 1.42
Tasks: 252 total,   2 running, 196 sleeping,   0 stopped,  54 zombie
%Cpu(s):  5.9 us,  5.9 sy,  0.0 ni, 85.3 id,  0.0 wa,  2.9 hi,  0.0 si,  0.0 st
MiB Mem :   3625.3 total,    139.8 free,   2395.4 used,   1090.1 buff/cache
MiB Swap:      0.0 total,      0.0 free,      0.0 used.    949.4 avail Mem

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
 866186 root      20   0   22024   4932   3432 S   6.2   0.1   7:10.58 ./cv-render
1398379 root      20   0 2498248  89164  20720 S   6.2   2.4   2055:06 /usr/bin/kubelet --bootstra+
1404790 65532     20   0 1287016  21224      0 S   6.2   0.6 206:58.70 /coredns -conf /etc/coredns+
      1 root      20   0  387308   7460   3072 S   0.0   0.2   1324:21 /usr/lib/systemd/systemd --+
      2 root      20   0       0      0      0 S   0.0   0.0   0:04.12 [kthreadd]
      3 root       0 -20       0      0      0 I   0.0   0.0   0:00.00 [rcu_gp]
      4 root       0 -20       0      0      0 I   0.0   0.0   0:00.00 [rcu_par_gp]

this just hidden the output, not wrap the output, I still want to see the full output. I also tried like this:

top -c -w 512|fold -w 120 -s

the wrap works, but the command did not output the full, just using + at the end of command.

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2
  • tricking top into thinking the terminal is 1000 columns wide and 15 rows high with stty cols 1000 rows 15 kind of works for me. Commented Jan 12 at 15:48
  • In any case, you can always scroll left or right with the left/righ keys Commented Jan 12 at 15:54

3 Answers 3

Reset to default
2

The command you are looking for is fold.

fold -w 80 -s

the -s option says to break at a space character.

the -w option is the character position at which to insert a newline.

This is by far the simplest solution. ... BUT ... top will mess with you and change the output to truncate the command field even if you run it in -b (batch) mode.

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4
  • I tried to using command like this top -c -w 512|fold -w 120 -s,the command still did not output the full output. Commented Jan 12 at 15:57
  • top needs -b to work in batch mode to over-ride the actual window width, and -n to limit the number of iterations because it is then not in page mode in the terminal. Try top -bc -n1 -w 512 | fold -w $COLUMNS -s. Using awk to do the folding with an indent on the continuation lines would be prettier. Commented Jan 12 at 16:21
  • if the top exceed the width 512, how could I output the full command? the kubernetes command may more than 512. Commented Jan 13 at 4:16
  • Seems the max width is 512. Commented Jan 13 at 5:13
1

You have good answers already giving the -w option and the COLUMNS environment variable. There are some situations where using -w with a numeric argument is less desirable (e.g., when you don't want top -b to output all processes, but only the top n processes), so setting COLUMNS might end up being the thing you want.

I described one of these quirks in this answer a couple of years ago. That question needed to cover more options to the top command than you're asking for here, but who knows? - those additional items may be useful to you soon.

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0

sounds like a programming task to you: simply write a program (in awk, perl, python, C++, Rust, Go, ALGOL, whatever you like) that copies lines from the input to the output until (and inclduing when) it finds the line ending in the string COMMAND, where it takes not of the column in which that starts.

From there on, your program would just copy each line that is at most as long as your desired line length (say, 80 characters), and split any longer line at the appropriate position, inserting the amount of spaces as noted when scanning above, before inserting the remainder of the line (and if necessary splitting again).

Sounds like a cute little programming exercise, which I'm sure you can do by now, considering your question history!

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