1singularity(1) singularity(1)
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6 singularity-exec - Run a command within a container
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11 singularity exec [exec options...] <container> <command>
12
16 singularity exec supports the following formats:
17 *.sif Singularity Image Format (SIF). Native to
20 Singularity 3.0+
21 *.sqsh SquashFS format. Native to Singularity 2.4+
24 *.img ext3 format. Native to Singularity versions < 2.4.
27 directory/ sandbox format. Directory containing a valid root
30 file
31 system and optionally Singularity meta-data.
32 instance://* A local running instance of a container. (See the
35 instance
36 command group.)
37 library://* A container hosted on a Library (default
40 ⟨https://cloud.sylabs.io/library)⟩
42 docker://* A container hosted on Docker Hub
45 shub://* A container hosted on Singularity Hub
48 oras://* A container hosted on a supporting OCI registry
51
55 --add-caps=""
56 a comma separated capability list to add
57 --allow-setuid[=false]
60 allow setuid binaries in container (root only)
61 --app=""
64 set an application to run inside a container
65 --apply-cgroups=""
68 apply cgroups from file for container processes (root only)
69 -B, --bind=[]
72 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.
77 -e, --cleanenv[=false]
80 clean environment before running container
81 -c, --contain[=false]
84 use minimal /dev and empty other directories (e.g. /tmp and $HOME)
85 instead of sharing filesystems from your host
86 -C, --containall[=false]
89 contain not only file systems, but also PID, IPC, and environment
90 --disable-cache[=false]
93 dont use cache, and dont create cache
94 --dns=""
97 list of DNS server separated by commas to add in resolv.conf
98 --docker-login[=false]
101 login to a Docker Repository interactively
102 --drop-caps=""
105 a comma separated capability list to drop
106 -f, --fakeroot[=false]
109 run container in new user namespace as uid 0
110 -h, --help[=false]
113 help for exec
114 -H, --home="/builddir"
117 a home directory specification. spec can either be a src path or
118 src:dest pair. src is the source path of the home directory outside
119 the container and dest overrides the home directory within the
120 container.
121 --hostname=""
124 set container hostname
125 -i, --ipc[=false]
128 run container in a new IPC namespace
129 --keep-privs[=false]
132 let root user keep privileges in container (root only)
133 -n, --net[=false]
136 run container in a new network namespace (sets up a bridge network
137 interface by default)
138 --network="bridge"
141 specify desired network type separated by commas, each network will
142 bring up a dedicated interface inside container
143 --network-args=[]
146 specify network arguments to pass to CNI plugins
147 --no-home[=false]
150 do NOT mount users home directory if home is not the current
151 working directory
152 --no-init[=false]
155 do NOT start shim process with --pid
156 --no-nv[=false]
159 --no-privs[=false]
162 drop all privileges from root user in container)
163 --nohttps[=false]
166 do NOT use HTTPS, for communicating with local docker registry
167 --nonet[=false]
170 Disable VM network handling
171 --nv[=false]
174 enable experimental Nvidia support
175 -o, --overlay=[]
178 use an overlayFS image for persistent data storage or as read-only
179 layer of container
180 --passphrase[=false]
183 Enter a passphrase for an encrypted contaner
184 --pem-path=""
187 Enter an path to a PEM formated RSA key for an encrypted container
188 -p, --pid[=false]
191 run container in a new PID namespace
192 --pwd=""
195 initial working directory for payload process inside the container
196 -S, --scratch=[]
199 include a scratch directory within the container that is linked to
200 a temporary dir (use -W to force location)
201 --security=[]
204 enable security features (SELinux, Apparmor, Seccomp)
205 -u, --userns[=false]
208 run container in a new user namespace, allowing Singularity to run
209 completely unprivileged on recent kernels. This disables some features
210 of Singularity, for example it only works with sandbox images.
211 --uts[=false]
214 run container in a new UTS namespace
215 --vm[=false]
218 enable VM support
219 --vm-cpu="1"
222 Number of CPU cores to allocate to Virtual Machine (implies --vm)
223 --vm-err[=false]
226 enable attaching stderr from VM
227 --vm-ip="dhcp"
230 IP Address to assign for container usage. Defaults to DHCP within
231 bridge network.
232 --vm-ram="1024"
235 Amount of RAM in MiB to allocate to Virtual Machine (implies --vm)
236 -W, --workdir=""
239 working directory to be used for /tmp, /var/tmp and $HOME (if
240 -c/--contain was also used)
241 -w, --writable[=false]
244 by default all Singularity containers are available as read only.
245 This option makes the file system accessible as read/write.
246 --writable-tmpfs[=false]
249 makes the file system accessible as read-write with non persistent
250 data (with overlay support only)
251
255 $ singularity exec /tmp/debian.sif cat /etc/debian_version
256 $ singularity exec /tmp/debian.sif python ./hello_world.py
257 $ cat hello_world.py | singularity exec /tmp/debian.sif python
258 $ sudo singularity exec --writable /tmp/debian.sif apt-get update
259 $ singularity exec instance://my_instance ps -ef
260 $ singularity exec library://centos cat /etc/os-release
261
266 singularity(1)
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271 21-Oct-2019 Auto generated by spf13/cobra
272Auto generated by spf13/cobra Oct 2019 singularity(1)