1singularity(1)                                                  singularity(1)
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NAME

6       singularity-exec - Run a command within a container
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SYNOPSIS

11       singularity exec [exec options...]
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DESCRIPTION

16       singularity exec supports the following formats:
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19       *.sif               Singularity Image Format (SIF). Native to Singular‐
20       ity 3.0+
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23       *.sqsh              SquashFS format.  Native to Singularity 2.4+
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26       *.img               ext3 format. Native to Singularity versions < 2.4.
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29       directory/          sandbox format. Directory containing a  valid  root
30       file
31                             system and optionally Singularity meta-data.
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34       instance://*         A  local running instance of a container. (See the
35       instance
36                             command group.)
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39       library://*         A SIF container hosted on a Library
40                             (default https://cloud.sylabs.io/library)
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43       docker://*          A Docker/OCI container  hosted  on  Docker  Hub  or
44       another
45                             OCI registry.
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48       shub://*            A container hosted on Singularity Hub.
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51       oras://*            A SIF container hosted on an OCI registry that sup‐
52       ports
53                             the OCI Registry As Storage (ORAS) specification.
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OPTIONS

58       --add-caps=""      a comma separated capability list to add
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61       --allow-setuid[=false]      allow setuid binaries  in  container  (root
62       only)
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65       --app=""      set an application to run inside a container
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68       --apply-cgroups=""      apply cgroups from file for container processes
69       (root only)
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72       -B, --bind=[]      a user-bind path specification.  spec has the format
73       src[:dest[:opts]], where src and dest are outside and inside paths.  If
74       dest is not given, it is set equal to src.  Mount options ('opts')  may
75       be  specified  as  'ro'  (read-only)  or 'rw' (read/write, which is the
76       default). Multiple bind paths can be given by a comma separated list.
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79       -e, --cleanenv[=false]      clean environment before running container
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82       -c, --contain[=false]      use minimal /dev and empty other directories
83       (e.g. /tmp and $HOME) instead of sharing filesystems from your host
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86       -C,  --containall[=false]       contain not only file systems, but also
87       PID, IPC, and environment
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90       --disable-cache[=false]      dont use cache, and dont create cache
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93       --dns=""      list  of  DNS  server  separated  by  commas  to  add  in
94       resolv.conf
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97       --docker-login[=false]      login to a Docker Repository interactively
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100       --drop-caps=""      a comma separated capability list to drop
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103       --env=[]      pass environment variable to contained process
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106       --env-file=""       pass  environment  variables from file to contained
107       process
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110       -f, --fakeroot[=false]      run container in new user namespace as  uid
111       0
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114       --fusemount=[]       A  FUSE filesystem mount specification of the form
115       ': ' - where  is 'container' or 'host', specifying where the mount will
116       be  performed  ('container-daemon'  or  'host-daemon' will run the FUSE
117       process detached).  is the path to the FUSE  executable,  plus  options
118       for  the  mount.   is  the  location in the container to which the FUSE
119       mount will  be  attached.  E.g.  'container:sshfs  10.0.0.1:/  /sshfs'.
120       Implies --pid.
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123       -h, --help[=false]      help for exec
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126       -H,  --home="/builddir"       a home directory specification.  spec can
127       either be a src path or src:dest pair.  src is the source path  of  the
128       home directory outside the container and dest overrides the home direc‐
129       tory within the container.
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132       --hostname=""      set container hostname
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135       -i, --ipc[=false]      run container in a new IPC namespace
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138       --keep-privs[=false]      let root user keep  privileges  in  container
139       (root only)
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142       -n,  --net[=false]       run container in a new network namespace (sets
143       up a bridge network interface by default)
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146       --network="bridge"      specify desired network type separated by  com‐
147       mas, each network will bring up a dedicated interface inside container
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150       --network-args=[]      specify network arguments to pass to CNI plugins
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153       --no-home[=false]       do  NOT  mount users home directory if /home is
154       not the current working directory
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157       --no-init[=false]      do NOT start shim process with --pid
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160       --no-mount=[]      disable one or more mount xxx options set in  singu‐
161       larity.conf
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164       --no-privs[=false]       drop  all  privileges  from  root user in con‐
165       tainer)
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168       --no-umask[=false]      do not propagate umask to  the  container,  set
169       default 0022 umask
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172       --nohttps[=false]       do  NOT  use HTTPS with the docker:// transport
173       (useful for local docker registries without a certificate)
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176       --nonet[=false]      disable VM network handling
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179       --nv[=false]      enable experimental Nvidia support
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182       -o, --overlay=[]      use an overlayFS image for persistent data  stor‐
183       age or as read-only layer of container
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186       --passphrase[=false]      prompt for an encryption passphrase
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189       --pem-path=""       enter  an  path  to  a  PEM formated RSA key for an
190       encrypted container
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193       -p, --pid[=false]      run container in a new PID namespace
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196       --pwd=""      initial working directory for payload process inside  the
197       container
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200       --rocm[=false]      enable experimental Rocm support
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203       -S,  --scratch=[]      include a scratch directory within the container
204       that is linked to a temporary dir (use -W to force location)
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207       --security=[]      enable security features  (SELinux,  Apparmor,  Sec‐
208       comp)
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211       -u, --userns[=false]      run container in a new user namespace, allow‐
212       ing Singularity to run completely unprivileged on recent kernels.  This
213       disables  some  features of Singularity, for example it only works with
214       sandbox images.
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217       --uts[=false]      run container in a new UTS namespace
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220       --vm[=false]      enable VM support
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223       --vm-cpu="1"      number of CPU cores to allocate  to  Virtual  Machine
224       (implies --vm)
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227       --vm-err[=false]      enable attaching stderr from VM
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230       --vm-ip="dhcp"       IP Address to assign for container usage. Defaults
231       to DHCP within bridge network.
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234       --vm-ram="1024"      amount of  RAM  in  MiB  to  allocate  to  Virtual
235       Machine (implies --vm)
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238       -W,  --workdir=""       working directory to be used for /tmp, /var/tmp
239       and $HOME (if -c/--contain was also used)
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242       -w, --writable[=false]      by default all Singularity  containers  are
243       available as read only. This option makes the file system accessible as
244       read/write.
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247       --writable-tmpfs[=false]       makes  the  file  system  accessible  as
248       read-write with non persistent data (with overlay support only)
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EXAMPLE

253                $ singularity exec /tmp/debian.sif cat /etc/debian_version
254                $ singularity exec /tmp/debian.sif python ./hello_world.py
255                $ cat hello_world.py | singularity exec /tmp/debian.sif python
256                $ sudo singularity exec --writable /tmp/debian.sif apt-get update
257                $ singularity exec instance://my_instance ps -ef
258                $ singularity exec library://centos cat /etc/os-release
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SEE ALSO

264       singularity(1)
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HISTORY

269       11-Mar-2021 Auto generated by spf13/cobra
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273Auto generated by spf13/cobra      Mar 2021                     singularity(1)
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