Delete all SYSTEM V memory and semaphores on UNIX-like systems

Question

How can I remove all unused semaphores and shared memory with a single command on a UNIX-like system like Ubuntu?

Answer 1

Here, save and try this script (kill_ipcs.sh) in your shell:

#!/bin/bash

ME=`whoami`

IPCS_S=`ipcs -s | egrep "0x[0-9a-f]+ [0-9]+" | grep $ME | cut -f2 -d" "`
IPCS_M=`ipcs -m | egrep "0x[0-9a-f]+ [0-9]+" | grep $ME | cut -f2 -d" "`
IPCS_Q=`ipcs -q | egrep "0x[0-9a-f]+ [0-9]+" | grep $ME | cut -f2 -d" "`


for id in $IPCS_M; do
  ipcrm -m $id;
done

for id in $IPCS_S; do
  ipcrm -s $id;
done

for id in $IPCS_Q; do
  ipcrm -q $id;
done

We use it whenever we run IPCS programs on a university student’s server. Some people do not always clean, so ... this is necessary: ​​P

Answer 2

ipcs -s | grep $USERNAME | perl -e 'while (<STDIN>) { @a=split(/\s+/); print `ipcrm sem $a[1]`}'

or

ipcs -s | grep $USERNAME | awk ' { print $2 } ' | xargs ipcrm sem

Change $ USERNAME to your real username.

Answer 3

, , ipcs , ipcrm. , . , , .

Answer 4

Mac OS:

for n in `ipcs -b -m | egrep ^m | awk '{ print $2; }'`; do ipcrm -m $n; done

Answer 5

, -, :

ipcs -a | grep `whoami`

linux :

ipcs | nawk -v u=`whoami` '/Shared/,/^$/{ if($6==0&&$3==u) print "ipcrm shm",$2,";"}/Semaphore/,/^$/{ if($3==u) print "ipcrm sem",$2,";"}' | /bin/sh

:

ipcs -a | nawk -v u=`whoami` '$5==u &&(($1=="m" && $9==0)||($1=="s")){print "ipcrm -"$1,$2,";"}' | /bin/sh

di.uoa.gr

,

sems/shared mem -

Answer 6

FreeBSD:

#!/usr/local/bin/bash
for i in $(ipcs -a | grep "^s" | awk '{ print $2 }');
do
        echo "ipcrm -s $i"
        ipcrm -s $i
done

Answer 7

1

ipcs -q | sed "$ d; 1,2d" |  awk '{ print "Removing " $2; system("ipcrm -q " $2) }'

ipcs -q

sed "$ d; 1,2d " ("$ d") ("1,2d")

awk , "ipcrm -q" w.r.t. 2 (coz $2)

Answer 8

, NFS, ? , , , API, , semaphore - , , .

? , NFS?

, , , .

Answer 9

bvamos, , sem :

NAME ipcrm - , ipcrm [-M | -m id | -Q | -q id | -S | -s id]...

ipcrm [shm | msg | sem] id...

us ipcrm -m, id

#!/bin/bash

set IPCS_M = ipcs -m | egrep "0x[0-9a-f]+ [0-9]+" | grep $USERNAME | cut -f2 -d" "

for id in $IPCS_M; do
  ipcrm -m $id;
done

ipcrm -m,

#!/bin/bash

set IPCS_M = ipcs -m | egrep "0x[0-9a-f]+ [0-9]+" | grep $USERNAME | cut -f1 -d" "

for id in $IPCS_M; do
  ipcrm -M $id;
done

us ipcrm -q, id

#!/bin/bash

set IPCS_Q = ipcs -q | egrep "0x[0-9a-f]+ [0-9]+" | grep $USERNAME | cut -f2 -d" "

for id in $IPCS_Q; do
  ipcrm -q $id;
done

ipcrm -q,

#!/bin/bash

set IPCS_Q = ipcs -q | egrep "0x[0-9a-f]+ [0-9]+" | grep $USERNAME | cut -f1 -d" "

for id in $IPCS_Q; do
  ipcrm -Q $id;
done

us ipcrm -s, id

#!/bin/bash

set IPCS_S = ipcs -s | egrep "0x[0-9a-f]+ [0-9]+" | grep $USERNAME | cut -f2 -d" "

for id in $IPCS_S; do
  ipcrm -s $id;
done

ipcrm -s,

#!/bin/bash

set IPCS_S = ipcs -s | egrep "0x[0-9a-f]+ [0-9]+" | grep $USERNAME | cut -f1 -d" "

for id in $IPCS_S; do
  ipcrm -S $id;
done

Answer 10

FreeBSD

#!/bin/sh
for i in $(ipcs -m | awk '{ print $2 }' | sed 1,2d);
do
    echo "ipcrm -m $i"
    ipcrm -m $i
done

#!/bin/sh
for i in $(ipcs -s | awk '{ print $2 }' | sed 1,2d);
do
    echo "ipcrm -s $i"
    ipcrm -s $i
done

Answer 11

#!/bin/bash
ipcs -m | grep `whoami` | awk '{ print $2 }' | xargs -n1 ipcrm -m
ipcs -s | grep `whoami` | awk '{ print $2 }' | xargs -n1 ipcrm -s
ipcs -q | grep `whoami` | awk '{ print $2 }' | xargs -n1 ipcrm -q

Answer 12

rkhunter gives me a check for suspicious shared memory segments [Warning]

I am trying to clear memory segments using the script above. but I warn again