Bash control task concurrency script

Bash controls the number of concurrent jobs. The script uses bash to control the number of concurrent jobs. 01 #! /Bin/bash02 #03 04 CMDS [1] = "echo $ USER '01 begin' & sleep 6 & echo $ USER '01 end'" 05 CMDS [2] = "echo $ USER '02 in in' & sleep 3 & echo $ user' 02 end'" 06 CMDS [3] = "echo $ USER '03 in in' & sleep 7 & echo $ USER '03 end' "07 CMDS [4] =" echo $ user' 04 In in '& sleep 4 & echo $ user' 04 end' "08 CMDS [5] = "echo $ USER '05 in in' & sleep 2 & echo $ USER '05 end'" 09 CMDS [6] = "echo $ USER '06 in in' & sleep 5 & echo $ USER '06 end' "10 11N =$ {# CMDS [@]} 12 13MAX = 314 PIDS = ''15for I in $ (seq $ N) 16do17 while [1-gt 0] 18 do19 C = 020 pids = ''21 for PID in $ PIDS22 do23 ps $ PID>/dev/null 2>/dev/null24 if [$? -Eq 0] 25 then26 pids = "$ pids $ PID" 27 (C = C + 1 )) 28 fi29 done30 PIDS = $ pids31 32 [$ C-lt $ MAX] & break33 sleep 134 done35 36 # echo $ I $ {CMDS [$ I]} 37 CMD =$ {CMDS [$ I]} 38 bash-c "$ CMD" & 39 PIDS = "$ PIDS $! "40done41 42 wait